Improve issue search (#2387)

* Improve issue indexer

* Fix new issue sqlite bug

* Different test indexer paths for each db

* Add integration indexer paths to make clean

.gitignore

@@ -53,5 +53,8 @@ coverage.all
 /integrations/gitea-integration-mysql
 /integrations/gitea-integration-pgsql
 /integrations/gitea-integration-sqlite
+/integrations/indexers-mysql
+/integrations/indexers-pgsql
+/integrations/indexers-sqlite
 /integrations/mysql.ini
 /integrations/pgsql.ini

Makefile

@@ -63,7 +63,11 @@ all: build
 .PHONY: clean
 clean:
 	$(GO) clean -i ./...
-	rm -rf $(EXECUTABLE) $(DIST) $(BINDATA) integrations*.test integrations/gitea-integration-pgsql/ integrations/gitea-integration-mysql/ integrations/gitea-integration-sqlite/ integrations/mysql.ini integrations/pgsql.ini
+	rm -rf $(EXECUTABLE) $(DIST) $(BINDATA) \
+		integrations*.test \
+		integrations/gitea-integration-pgsql/ integrations/gitea-integration-mysql/ integrations/gitea-integration-sqlite/ \
+		integrations/indexers-mysql/ integrations/indexers-pgsql integrations/indexers-sqlite \
+		integrations/mysql.ini integrations/pgsql.ini
 
 required-gofmt-version:
 	@$(GO) version  | grep -q '\(1.7\|1.8\)' || { echo "We require go version 1.7 or 1.8 to format code" >&2 && exit 1; }

integrations/integration_test.go

@@ -57,7 +57,14 @@ func TestMain(m *testing.M) {
 		fmt.Printf("Error initializing test database: %v\n", err)
 		os.Exit(1)
 	}
-	os.Exit(m.Run())
+	exitCode := m.Run()
+
+	if err = os.RemoveAll(setting.Indexer.IssuePath); err != nil {
+		fmt.Printf("os.RemoveAll: %v\n", err)
+		os.Exit(1)
+	}
+
+	os.Exit(exitCode)
 }
 
 func initIntegrationTest() {

integrations/issue_test.go

@@ -18,8 +18,10 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func getIssuesSelection(htmlDoc *HTMLDoc) *goquery.Selection {
-	return htmlDoc.doc.Find(".issue.list").Find("li").Find(".title")
+func getIssuesSelection(t testing.TB, htmlDoc *HTMLDoc) *goquery.Selection {
+	issueList := htmlDoc.doc.Find(".issue.list")
+	assert.EqualValues(t, 1, issueList.Length())
+	return issueList.Find("li").Find(".title")
 }
 
 func getIssue(t *testing.T, repoID int64, issueSelection *goquery.Selection) *models.Issue {
@@ -31,6 +33,18 @@ func getIssue(t *testing.T, repoID int64, issueSelection *goquery.Selection) *mo
 	return models.AssertExistsAndLoadBean(t, &models.Issue{RepoID: repoID, Index: int64(index)}).(*models.Issue)
 }
 
+func assertMatch(t testing.TB, issue *models.Issue, keyword string) {
+	matches := strings.Contains(strings.ToLower(issue.Title), keyword) ||
+		strings.Contains(strings.ToLower(issue.Content), keyword)
+	for _, comment := range issue.Comments {
+		matches = matches || strings.Contains(
+			strings.ToLower(comment.Content),
+			keyword,
+		)
+	}
+	assert.True(t, matches)
+}
+
 func TestNoLoginViewIssues(t *testing.T) {
 	prepareTestEnv(t)
 
@@ -38,19 +52,18 @@ func TestNoLoginViewIssues(t *testing.T) {
 	MakeRequest(t, req, http.StatusOK)
 }
 
-func TestNoLoginViewIssuesSortByType(t *testing.T) {
+func TestViewIssuesSortByType(t *testing.T) {
 	prepareTestEnv(t)
 
 	user := models.AssertExistsAndLoadBean(t, &models.User{ID: 1}).(*models.User)
 	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
-	repo.Owner = models.AssertExistsAndLoadBean(t, &models.User{ID: repo.OwnerID}).(*models.User)
 
 	session := loginUser(t, user.Name)
 	req := NewRequest(t, "GET", repo.RelLink()+"/issues?type=created_by")
 	resp := session.MakeRequest(t, req, http.StatusOK)
 
 	htmlDoc := NewHTMLParser(t, resp.Body)
-	issuesSelection := getIssuesSelection(htmlDoc)
+	issuesSelection := getIssuesSelection(t, htmlDoc)
 	expectedNumIssues := models.GetCount(t,
 		&models.Issue{RepoID: repo.ID, PosterID: user.ID},
 		models.Cond("is_closed=?", false),
@@ -67,6 +80,26 @@ func TestNoLoginViewIssuesSortByType(t *testing.T) {
 	})
 }
 
+func TestViewIssuesKeyword(t *testing.T) {
+	prepareTestEnv(t)
+
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
+
+	const keyword = "first"
+	req := NewRequestf(t, "GET", "%s/issues?q=%s", repo.RelLink(), keyword)
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	issuesSelection := getIssuesSelection(t, htmlDoc)
+	assert.EqualValues(t, 1, issuesSelection.Length())
+	issuesSelection.Each(func(_ int, selection *goquery.Selection) {
+		issue := getIssue(t, repo.ID, selection)
+		assert.False(t, issue.IsClosed)
+		assert.False(t, issue.IsPull)
+		assertMatch(t, issue, keyword)
+	})
+}
+
 func TestNoLoginViewIssue(t *testing.T) {
 	prepareTestEnv(t)
 

integrations/mysql.ini.tmpl

@@ -10,6 +10,9 @@ PASSWD   = {{TEST_MYSQL_PASSWORD}}
 SSL_MODE = disable
 PATH     = data/gitea.db
 
+[indexer]
+ISSUE_INDEXER_PATH = integrations/indexers-mysql/issues.bleve
+
 [repository]
 ROOT = integrations/gitea-integration-mysql/gitea-repositories
 

integrations/pgsql.ini.tmpl

@@ -10,6 +10,9 @@ PASSWD   = {{TEST_PGSQL_PASSWORD}}
 SSL_MODE = disable
 PATH     = data/gitea.db
 
+[indexer]
+ISSUE_INDEXER_PATH = integrations/indexers-pgsql/issues.bleve
+
 [repository]
 ROOT = integrations/gitea-integration-pgsql/gitea-repositories
 

integrations/sqlite.ini

@@ -5,6 +5,9 @@ RUN_MODE = prod
 DB_TYPE  = sqlite3
 PATH     = :memory:
 
+[indexer]
+ISSUE_INDEXER_PATH = integrations/indexers-sqlite/issues.bleve
+
 [repository]
 ROOT = integrations/gitea-integration-sqlite/gitea-repositories
 

models/fixtures/issue.yml

@@ -5,7 +5,7 @@
   poster_id: 1
   assignee_id: 1
   name: issue1
-  content: content1
+  content: content for the first issue
   is_closed: false
   is_pull: false
   num_comments: 2
@@ -18,7 +18,7 @@
   index: 2
   poster_id: 1
   name: issue2
-  content: content2
+  content: content for the second issue
   milestone_id: 1
   is_closed: false
   is_pull: true
@@ -32,7 +32,7 @@
   index: 3
   poster_id: 1
   name: issue3
-  content: content4
+  content: content for the third issue
   is_closed: false
   is_pull: true
   created_unix: 946684820
@@ -44,7 +44,7 @@
   index: 1
   poster_id: 2
   name: issue4
-  content: content4
+  content: content for the fourth issue
   is_closed: true
   is_pull: false
 
@@ -54,7 +54,7 @@
   index: 4
   poster_id: 2
   name: issue5
-  content: content5
+  content: content for the fifth issue
   is_closed: true
   is_pull: false
 -

models/issue.go

@@ -155,6 +155,17 @@ func (issue *Issue) loadPullRequest(e Engine) (err error) {
 	return nil
 }
 
+func (issue *Issue) loadComments(e Engine) (err error) {
+	if issue.Comments != nil {
+		return nil
+	}
+	issue.Comments, err = findComments(e, FindCommentsOptions{
+		IssueID: issue.ID,
+		Type:    CommentTypeUnknown,
+	})
+	return err
+}
+
 func (issue *Issue) loadAttributes(e Engine) (err error) {
 	if err = issue.loadRepo(e); err != nil {
 		return
@@ -191,14 +202,8 @@ func (issue *Issue) loadAttributes(e Engine) (err error) {
 		}
 	}
 
-	if issue.Comments == nil {
-		issue.Comments, err = findComments(e, FindCommentsOptions{
-			IssueID: issue.ID,
-			Type:    CommentTypeUnknown,
-		})
-		if err != nil {
-			return fmt.Errorf("getCommentsByIssueID [%d]: %v", issue.ID, err)
-		}
+	if err = issue.loadComments(e); err != nil {
+		return
 	}
 
 	return nil
@@ -577,7 +582,7 @@ func updateIssueCols(e Engine, issue *Issue, cols ...string) error {
 	if _, err := e.Id(issue.ID).Cols(cols...).Update(issue); err != nil {
 		return err
 	}
-	UpdateIssueIndexer(issue)
+	UpdateIssueIndexer(issue.ID)
 	return nil
 }
 
@@ -907,8 +912,6 @@ func newIssue(e *xorm.Session, doer *User, opts NewIssueOptions) (err error) {
 		return err
 	}
 
-	UpdateIssueIndexer(opts.Issue)
-
 	if len(opts.Attachments) > 0 {
 		attachments, err := getAttachmentsByUUIDs(e, opts.Attachments)
 		if err != nil {
@@ -947,6 +950,8 @@ func NewIssue(repo *Repository, issue *Issue, labelIDs []int64, uuids []string)
 		return fmt.Errorf("Commit: %v", err)
 	}
 
+	UpdateIssueIndexer(issue.ID)
+
 	if err = NotifyWatchers(&Action{
 		ActUserID: issue.Poster.ID,
 		ActUser:   issue.Poster,
@@ -1448,7 +1453,7 @@ func updateIssue(e Engine, issue *Issue) error {
 	if err != nil {
 		return err
 	}
-	UpdateIssueIndexer(issue)
+	UpdateIssueIndexer(issue.ID)
 	return nil
 }
 

models/issue_comment.go

@@ -520,7 +520,14 @@ func CreateComment(opts *CreateCommentOptions) (comment *Comment, err error) {
 		return nil, err
 	}
 
-	return comment, sess.Commit()
+	if err = sess.Commit(); err != nil {
+		return nil, err
+	}
+
+	if opts.Type == CommentTypeComment {
+		UpdateIssueIndexer(opts.Issue.ID)
+	}
+	return comment, nil
 }
 
 // CreateIssueComment creates a plain issue comment.
@@ -645,8 +652,12 @@ func GetCommentsByRepoIDSince(repoID, since int64) ([]*Comment, error) {
 
 // UpdateComment updates information of comment.
 func UpdateComment(c *Comment) error {
-	_, err := x.Id(c.ID).AllCols().Update(c)
-	return err
+	if _, err := x.Id(c.ID).AllCols().Update(c); err != nil {
+		return err
+	} else if c.Type == CommentTypeComment {
+		UpdateIssueIndexer(c.IssueID)
+	}
+	return nil
 }
 
 // DeleteComment deletes the comment
@@ -672,5 +683,10 @@ func DeleteComment(comment *Comment) error {
 		return err
 	}
 
-	return sess.Commit()
+	if err := sess.Commit(); err != nil {
+		return err
+	} else if comment.Type == CommentTypeComment {
+		UpdateIssueIndexer(comment.IssueID)
+	}
+	return nil
 }

models/issue_indexer.go

@@ -6,112 +6,21 @@ package models
 
 import (
 	"fmt"
-	"os"
-	"strconv"
-	"strings"
 
+	"code.gitea.io/gitea/modules/indexer"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
-
-	"github.com/blevesearch/bleve"
-	"github.com/blevesearch/bleve/analysis/analyzer/simple"
-	"github.com/blevesearch/bleve/search/query"
 )
 
-// issueIndexerUpdateQueue queue of issues that need to be updated in the issues
-// indexer
-var issueIndexerUpdateQueue chan *Issue
-
-// issueIndexer (thread-safe) index for searching issues
-var issueIndexer bleve.Index
-
-// issueIndexerData data stored in the issue indexer
-type issueIndexerData struct {
-	ID     int64
-	RepoID int64
-
-	Title   string
-	Content string
-}
-
-// numericQuery an numeric-equality query for the given value and field
-func numericQuery(value int64, field string) *query.NumericRangeQuery {
-	f := float64(value)
-	tru := true
-	q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
-	q.SetField(field)
-	return q
-}
-
-// SearchIssuesByKeyword searches for issues by given conditions.
-// Returns the matching issue IDs
-func SearchIssuesByKeyword(repoID int64, keyword string) ([]int64, error) {
-	terms := strings.Fields(strings.ToLower(keyword))
-	indexerQuery := bleve.NewConjunctionQuery(
-		numericQuery(repoID, "RepoID"),
-		bleve.NewDisjunctionQuery(
-			bleve.NewPhraseQuery(terms, "Title"),
-			bleve.NewPhraseQuery(terms, "Content"),
-		))
-	search := bleve.NewSearchRequestOptions(indexerQuery, 2147483647, 0, false)
-	search.Fields = []string{"ID"}
-
-	result, err := issueIndexer.Search(search)
-	if err != nil {
-		return nil, err
-	}
-
-	issueIDs := make([]int64, len(result.Hits))
-	for i, hit := range result.Hits {
-		issueIDs[i] = int64(hit.Fields["ID"].(float64))
-	}
-	return issueIDs, nil
-}
+// issueIndexerUpdateQueue queue of issue ids to be updated
+var issueIndexerUpdateQueue chan int64
 
 // InitIssueIndexer initialize issue indexer
 func InitIssueIndexer() {
-	_, err := os.Stat(setting.Indexer.IssuePath)
-	if err != nil {
-		if os.IsNotExist(err) {
-			if err = createIssueIndexer(); err != nil {
-				log.Fatal(4, "CreateIssuesIndexer: %v", err)
-			}
-			if err = populateIssueIndexer(); err != nil {
-				log.Fatal(4, "PopulateIssuesIndex: %v", err)
-			}
-		} else {
-			log.Fatal(4, "InitIssuesIndexer: %v", err)
-		}
-	} else {
-		issueIndexer, err = bleve.Open(setting.Indexer.IssuePath)
-		if err != nil {
-			log.Fatal(4, "InitIssuesIndexer, open index: %v", err)
-		}
-	}
-	issueIndexerUpdateQueue = make(chan *Issue, setting.Indexer.UpdateQueueLength)
+	indexer.InitIssueIndexer(populateIssueIndexer)
+	issueIndexerUpdateQueue = make(chan int64, setting.Indexer.UpdateQueueLength)
 	go processIssueIndexerUpdateQueue()
-	// TODO close issueIndexer when Gitea closes
-}
-
-// createIssueIndexer create an issue indexer if one does not already exist
-func createIssueIndexer() error {
-	mapping := bleve.NewIndexMapping()
-	docMapping := bleve.NewDocumentMapping()
-
-	docMapping.AddFieldMappingsAt("ID", bleve.NewNumericFieldMapping())
-	docMapping.AddFieldMappingsAt("RepoID", bleve.NewNumericFieldMapping())
-
-	textFieldMapping := bleve.NewTextFieldMapping()
-	textFieldMapping.Analyzer = simple.Name
-	docMapping.AddFieldMappingsAt("Title", textFieldMapping)
-	docMapping.AddFieldMappingsAt("Content", textFieldMapping)
-
-	mapping.AddDocumentMapping("issues", docMapping)
-
-	var err error
-	issueIndexer, err = bleve.New(setting.Indexer.IssuePath, mapping)
-	return err
 }
 
 // populateIssueIndexer populate the issue indexer with issue data
@@ -127,57 +36,64 @@ func populateIssueIndexer() error {
 		if len(repos) == 0 {
 			return nil
 		}
-		batch := issueIndexer.NewBatch()
 		for _, repo := range repos {
 			issues, err := Issues(&IssuesOptions{
 				RepoID:   repo.ID,
 				IsClosed: util.OptionalBoolNone,
 				IsPull:   util.OptionalBoolNone,
 			})
-			if err != nil {
-				return fmt.Errorf("Issues: %v", err)
+			updates := make([]indexer.IssueIndexerUpdate, len(issues))
+			for i, issue := range issues {
+				updates[i] = issue.update()
 			}
-			for _, issue := range issues {
-				err = batch.Index(issue.indexUID(), issue.issueData())
-				if err != nil {
-					return fmt.Errorf("batch.Index: %v", err)
-				}
+			if err = indexer.BatchUpdateIssues(updates...); err != nil {
+				return fmt.Errorf("BatchUpdate: %v", err)
 			}
 		}
-		if err = issueIndexer.Batch(batch); err != nil {
-			return fmt.Errorf("index.Batch: %v", err)
-		}
 	}
 }
 
 func processIssueIndexerUpdateQueue() {
 	for {
 		select {
-		case issue := <-issueIndexerUpdateQueue:
-			if err := issueIndexer.Index(issue.indexUID(), issue.issueData()); err != nil {
+		case issueID := <-issueIndexerUpdateQueue:
+			issue, err := GetIssueByID(issueID)
+			if err != nil {
+				log.Error(4, "issuesIndexer.Index: %v", err)
+				continue
+			}
+			if err = indexer.UpdateIssue(issue.update()); err != nil {
 				log.Error(4, "issuesIndexer.Index: %v", err)
 			}
 		}
 	}
 }
 
-// indexUID a unique identifier for an issue used in full-text indices
-func (issue *Issue) indexUID() string {
-	return strconv.FormatInt(issue.ID, 36)
-}
-
-func (issue *Issue) issueData() *issueIndexerData {
-	return &issueIndexerData{
-		ID:      issue.ID,
-		RepoID:  issue.RepoID,
-		Title:   issue.Title,
-		Content: issue.Content,
+func (issue *Issue) update() indexer.IssueIndexerUpdate {
+	comments := make([]string, 0, 5)
+	for _, comment := range issue.Comments {
+		if comment.Type == CommentTypeComment {
+			comments = append(comments, comment.Content)
+		}
+	}
+	return indexer.IssueIndexerUpdate{
+		IssueID: issue.ID,
+		Data: &indexer.IssueIndexerData{
+			RepoID:   issue.RepoID,
+			Title:    issue.Title,
+			Content:  issue.Content,
+			Comments: comments,
+		},
 	}
 }
 
 // UpdateIssueIndexer add/update an issue to the issue indexer
-func UpdateIssueIndexer(issue *Issue) {
-	go func() {
-		issueIndexerUpdateQueue <- issue
-	}()
+func UpdateIssueIndexer(issueID int64) {
+	select {
+	case issueIndexerUpdateQueue <- issueID:
+	default:
+		go func() {
+			issueIndexerUpdateQueue <- issueID
+		}()
+	}
 }

models/pull.go

@@ -640,6 +640,8 @@ func NewPullRequest(repo *Repository, pull *Issue, labelIDs []int64, uuids []str
 		return fmt.Errorf("Commit: %v", err)
 	}
 
+	UpdateIssueIndexer(pull.ID)
+
 	if err = NotifyWatchers(&Action{
 		ActUserID: pull.Poster.ID,
 		ActUser:   pull.Poster,

modules/indexer/indexer.go

@@ -5,10 +5,39 @@
 package indexer
 
 import (
-	"code.gitea.io/gitea/models"
+	"fmt"
+	"strconv"
+
+	"github.com/blevesearch/bleve"
+	"github.com/blevesearch/bleve/search/query"
 )
 
-// NewContext start indexer service
-func NewContext() {
-	models.InitIssueIndexer()
+// indexerID a bleve-compatible unique identifier for an integer id
+func indexerID(id int64) string {
+	return strconv.FormatInt(id, 36)
+}
+
+// idOfIndexerID the integer id associated with an indexer id
+func idOfIndexerID(indexerID string) (int64, error) {
+	id, err := strconv.ParseInt(indexerID, 36, 64)
+	if err != nil {
+		return 0, fmt.Errorf("Unexpected indexer ID %s: %v", indexerID, err)
+	}
+	return id, nil
+}
+
+// numericEqualityQuery a numeric equality query for the given value and field
+func numericEqualityQuery(value int64, field string) *query.NumericRangeQuery {
+	f := float64(value)
+	tru := true
+	q := bleve.NewNumericRangeInclusiveQuery(&f, &f, &tru, &tru)
+	q.SetField(field)
+	return q
+}
+
+func newMatchPhraseQuery(matchPhrase, field, analyzer string) *query.MatchPhraseQuery {
+	q := bleve.NewMatchPhraseQuery(matchPhrase)
+	q.FieldVal = field
+	q.Analyzer = analyzer
+	return q
 }

modules/indexer/issue.go

@@ -0,0 +1,143 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package indexer
+
+import (
+	"os"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/blevesearch/bleve"
+	"github.com/blevesearch/bleve/analysis/analyzer/custom"
+	"github.com/blevesearch/bleve/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/analysis/token/unicodenorm"
+	"github.com/blevesearch/bleve/analysis/tokenizer/unicode"
+)
+
+// issueIndexer (thread-safe) index for searching issues
+var issueIndexer bleve.Index
+
+// IssueIndexerData data stored in the issue indexer
+type IssueIndexerData struct {
+	RepoID   int64
+	Title    string
+	Content  string
+	Comments []string
+}
+
+// IssueIndexerUpdate an update to the issue indexer
+type IssueIndexerUpdate struct {
+	IssueID int64
+	Data    *IssueIndexerData
+}
+
+const issueIndexerAnalyzer = "issueIndexer"
+
+// InitIssueIndexer initialize issue indexer
+func InitIssueIndexer(populateIndexer func() error) {
+	_, err := os.Stat(setting.Indexer.IssuePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err = createIssueIndexer(); err != nil {
+				log.Fatal(4, "CreateIssuesIndexer: %v", err)
+			}
+			if err = populateIndexer(); err != nil {
+				log.Fatal(4, "PopulateIssuesIndex: %v", err)
+			}
+		} else {
+			log.Fatal(4, "InitIssuesIndexer: %v", err)
+		}
+	} else {
+		issueIndexer, err = bleve.Open(setting.Indexer.IssuePath)
+		if err != nil {
+			log.Error(4, "Unable to open issues indexer (%s)."+
+				" If the error is due to incompatible versions, try deleting the indexer files;"+
+				" gitea will recreate them with the appropriate version the next time it runs."+
+				" Deleting the indexer files will not result in loss of data.",
+				setting.Indexer.IssuePath)
+			log.Fatal(4, "InitIssuesIndexer, open index: %v", err)
+		}
+	}
+}
+
+// createIssueIndexer create an issue indexer if one does not already exist
+func createIssueIndexer() error {
+	mapping := bleve.NewIndexMapping()
+	docMapping := bleve.NewDocumentMapping()
+
+	docMapping.AddFieldMappingsAt("RepoID", bleve.NewNumericFieldMapping())
+
+	textFieldMapping := bleve.NewTextFieldMapping()
+	docMapping.AddFieldMappingsAt("Title", textFieldMapping)
+	docMapping.AddFieldMappingsAt("Content", textFieldMapping)
+	docMapping.AddFieldMappingsAt("Comments", textFieldMapping)
+
+	const unicodeNormNFC = "unicodeNormNFC"
+	if err := mapping.AddCustomTokenFilter(unicodeNormNFC, map[string]interface{}{
+		"type": unicodenorm.Name,
+		"form": unicodenorm.NFC,
+	}); err != nil {
+		return err
+	} else if err = mapping.AddCustomAnalyzer(issueIndexerAnalyzer, map[string]interface{}{
+		"type":          custom.Name,
+		"char_filters":  []string{},
+		"tokenizer":     unicode.Name,
+		"token_filters": []string{unicodeNormNFC, lowercase.Name},
+	}); err != nil {
+		return err
+	}
+
+	mapping.DefaultAnalyzer = issueIndexerAnalyzer
+	mapping.AddDocumentMapping("issues", docMapping)
+
+	var err error
+	issueIndexer, err = bleve.New(setting.Indexer.IssuePath, mapping)
+	return err
+}
+
+// UpdateIssue update the issue indexer
+func UpdateIssue(update IssueIndexerUpdate) error {
+	return issueIndexer.Index(indexerID(update.IssueID), update.Data)
+}
+
+// BatchUpdateIssues perform a batch update of the issue indexer
+func BatchUpdateIssues(updates ...IssueIndexerUpdate) error {
+	batch := issueIndexer.NewBatch()
+	for _, update := range updates {
+		err := batch.Index(indexerID(update.IssueID), update.Data)
+		if err != nil {
+			return err
+		}
+	}
+	return issueIndexer.Batch(batch)
+}
+
+// SearchIssuesByKeyword searches for issues by given conditions.
+// Returns the matching issue IDs
+func SearchIssuesByKeyword(repoID int64, keyword string) ([]int64, error) {
+	indexerQuery := bleve.NewConjunctionQuery(
+		numericEqualityQuery(repoID, "RepoID"),
+		bleve.NewDisjunctionQuery(
+			newMatchPhraseQuery(keyword, "Title", issueIndexerAnalyzer),
+			newMatchPhraseQuery(keyword, "Content", issueIndexerAnalyzer),
+			newMatchPhraseQuery(keyword, "Comments", issueIndexerAnalyzer),
+		))
+	search := bleve.NewSearchRequestOptions(indexerQuery, 2147483647, 0, false)
+
+	result, err := issueIndexer.Search(search)
+	if err != nil {
+		return nil, err
+	}
+
+	issueIDs := make([]int64, len(result.Hits))
+	for i, hit := range result.Hits {
+		issueIDs[i], err = idOfIndexerID(hit.ID)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return issueIDs, nil
+}

routers/init.go

@@ -13,7 +13,6 @@ import (
 	"code.gitea.io/gitea/models/migrations"
 	"code.gitea.io/gitea/modules/cron"
 	"code.gitea.io/gitea/modules/highlight"
-	"code.gitea.io/gitea/modules/indexer"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/mailer"
 	"code.gitea.io/gitea/modules/markup"
@@ -63,7 +62,7 @@ func GlobalInit() {
 
 		// Booting long running goroutines.
 		cron.NewContext()
-		indexer.NewContext()
+		models.InitIssueIndexer()
 		models.InitSyncMirrors()
 		models.InitDeliverHooks()
 		models.InitTestPullRequests()

routers/repo/issue.go

@@ -22,6 +22,7 @@ import (
 	"code.gitea.io/gitea/modules/auth"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/indexer"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markdown"
 	"code.gitea.io/gitea/modules/notification"
@@ -142,7 +143,7 @@ func Issues(ctx *context.Context) {
 	var issueIDs []int64
 	var err error
 	if len(keyword) > 0 {
-		issueIDs, err = models.SearchIssuesByKeyword(repo.ID, keyword)
+		issueIDs, err = indexer.SearchIssuesByKeyword(repo.ID, keyword)
 		if len(issueIDs) == 0 {
 			forceEmpty = true
 		}

vendor/github.com/blevesearch/bleve/README.md

@@ -4,6 +4,7 @@
 [![Join the chat at https://gitter.im/blevesearch/bleve](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/blevesearch/bleve?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![codebeat](https://codebeat.co/badges/38a7cbc9-9cf5-41c0-a315-0746178230f4)](https://codebeat.co/projects/github-com-blevesearch-bleve)
 [![Go Report Card](https://goreportcard.com/badge/blevesearch/bleve)](https://goreportcard.com/report/blevesearch/bleve)
+[![Sourcegraph](https://sourcegraph.com/github.com/blevesearch/bleve/-/badge.svg)](https://sourcegraph.com/github.com/blevesearch/bleve?badge)  [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
 modern text indexing in go - [blevesearch.com](http://www.blevesearch.com/)
 
@@ -33,29 +34,33 @@ Discuss usage and development of bleve in the [google group](https://groups.goog
 
 ## Indexing
 
-		message := struct{
-			Id   string
-			From string
-			Body string
-		}{
-			Id:   "example",
-			From: "marty.schoch@gmail.com",
-			Body: "bleve indexing is easy",
-		}
-
-		mapping := bleve.NewIndexMapping()
-		index, err := bleve.New("example.bleve", mapping)
-		if err != nil {
-			panic(err)
-		}
-		index.Index(message.Id, message)
+```go
+message := struct{
+	Id   string
+	From string
+	Body string
+}{
+	Id:   "example",
+	From: "marty.schoch@gmail.com",
+	Body: "bleve indexing is easy",
+}
+
+mapping := bleve.NewIndexMapping()
+index, err := bleve.New("example.bleve", mapping)
+if err != nil {
+	panic(err)
+}
+index.Index(message.Id, message)
+```
 
 ## Querying
 
-		index, _ := bleve.Open("example.bleve")
-		query := bleve.NewQueryStringQuery("bleve")
-		searchRequest := bleve.NewSearchRequest(query)
-		searchResult, _ := index.Search(searchRequest)
+```go
+index, _ := bleve.Open("example.bleve")
+query := bleve.NewQueryStringQuery("bleve")
+searchRequest := bleve.NewSearchRequest(query)
+searchResult, _ := index.Search(searchRequest)
+```
 
 ## License
 

vendor/github.com/blevesearch/bleve/analysis/analyzer/custom/custom.go

@@ -0,0 +1,145 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package custom
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "custom"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
+
+	var err error
+	var charFilters []analysis.CharFilter
+	charFiltersValue, ok := config["char_filters"]
+	if ok {
+		switch charFiltersValue := charFiltersValue.(type) {
+		case []string:
+			charFilters, err = getCharFilters(charFiltersValue, cache)
+			if err != nil {
+				return nil, err
+			}
+		case []interface{}:
+			charFiltersNames, err := convertInterfaceSliceToStringSlice(charFiltersValue, "char filter")
+			if err != nil {
+				return nil, err
+			}
+			charFilters, err = getCharFilters(charFiltersNames, cache)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			return nil, fmt.Errorf("unsupported type for char_filters, must be slice")
+		}
+	}
+
+	var tokenizerName string
+	tokenizerValue, ok := config["tokenizer"]
+	if ok {
+		tokenizerName, ok = tokenizerValue.(string)
+		if !ok {
+			return nil, fmt.Errorf("must specify tokenizer as string")
+		}
+	} else {
+		return nil, fmt.Errorf("must specify tokenizer")
+	}
+
+	tokenizer, err := cache.TokenizerNamed(tokenizerName)
+	if err != nil {
+		return nil, err
+	}
+
+	var tokenFilters []analysis.TokenFilter
+	tokenFiltersValue, ok := config["token_filters"]
+	if ok {
+		switch tokenFiltersValue := tokenFiltersValue.(type) {
+		case []string:
+			tokenFilters, err = getTokenFilters(tokenFiltersValue, cache)
+			if err != nil {
+				return nil, err
+			}
+		case []interface{}:
+			tokenFiltersNames, err := convertInterfaceSliceToStringSlice(tokenFiltersValue, "token filter")
+			if err != nil {
+				return nil, err
+			}
+			tokenFilters, err = getTokenFilters(tokenFiltersNames, cache)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			return nil, fmt.Errorf("unsupported type for token_filters, must be slice")
+		}
+	}
+
+	rv := analysis.Analyzer{
+		Tokenizer: tokenizer,
+	}
+	if charFilters != nil {
+		rv.CharFilters = charFilters
+	}
+	if tokenFilters != nil {
+		rv.TokenFilters = tokenFilters
+	}
+	return &rv, nil
+}
+
+func init() {
+	registry.RegisterAnalyzer(Name, AnalyzerConstructor)
+}
+
+func getCharFilters(charFilterNames []string, cache *registry.Cache) ([]analysis.CharFilter, error) {
+	charFilters := make([]analysis.CharFilter, len(charFilterNames))
+	for i, charFilterName := range charFilterNames {
+		charFilter, err := cache.CharFilterNamed(charFilterName)
+		if err != nil {
+			return nil, err
+		}
+		charFilters[i] = charFilter
+	}
+
+	return charFilters, nil
+}
+
+func getTokenFilters(tokenFilterNames []string, cache *registry.Cache) ([]analysis.TokenFilter, error) {
+	tokenFilters := make([]analysis.TokenFilter, len(tokenFilterNames))
+	for i, tokenFilterName := range tokenFilterNames {
+		tokenFilter, err := cache.TokenFilterNamed(tokenFilterName)
+		if err != nil {
+			return nil, err
+		}
+		tokenFilters[i] = tokenFilter
+	}
+
+	return tokenFilters, nil
+}
+
+func convertInterfaceSliceToStringSlice(interfaceSlice []interface{}, objType string) ([]string, error) {
+	stringSlice := make([]string, len(interfaceSlice))
+	for i, interfaceObj := range interfaceSlice {
+		stringObj, ok := interfaceObj.(string)
+		if ok {
+			stringSlice[i] = stringObj
+		} else {
+			return nil, fmt.Errorf(objType + " name must be a string")
+		}
+	}
+
+	return stringSlice, nil
+}

vendor/github.com/blevesearch/bleve/analysis/analyzer/simple/simple.go

@@ -1,46 +0,0 @@
-//  Copyright (c) 2014 Couchbase, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// 		http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package simple
-
-import (
-	"github.com/blevesearch/bleve/analysis"
-	"github.com/blevesearch/bleve/analysis/token/lowercase"
-	"github.com/blevesearch/bleve/analysis/tokenizer/letter"
-	"github.com/blevesearch/bleve/registry"
-)
-
-const Name = "simple"
-
-func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
-	tokenizer, err := cache.TokenizerNamed(letter.Name)
-	if err != nil {
-		return nil, err
-	}
-	toLowerFilter, err := cache.TokenFilterNamed(lowercase.Name)
-	if err != nil {
-		return nil, err
-	}
-	rv := analysis.Analyzer{
-		Tokenizer: tokenizer,
-		TokenFilters: []analysis.TokenFilter{
-			toLowerFilter,
-		},
-	}
-	return &rv, nil
-}
-
-func init() {
-	registry.RegisterAnalyzer(Name, AnalyzerConstructor)
-}

vendor/github.com/blevesearch/bleve/analysis/token/unicodenorm/unicodenorm.go

@@ -0,0 +1,79 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package unicodenorm
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+	"golang.org/x/text/unicode/norm"
+)
+
+const Name = "normalize_unicode"
+
+const NFC = "nfc"
+const NFD = "nfd"
+const NFKC = "nfkc"
+const NFKD = "nfkd"
+
+var forms = map[string]norm.Form{
+	NFC:  norm.NFC,
+	NFD:  norm.NFD,
+	NFKC: norm.NFKC,
+	NFKD: norm.NFKD,
+}
+
+type UnicodeNormalizeFilter struct {
+	form norm.Form
+}
+
+func NewUnicodeNormalizeFilter(formName string) (*UnicodeNormalizeFilter, error) {
+	form, ok := forms[formName]
+	if !ok {
+		return nil, fmt.Errorf("no form named %s", formName)
+	}
+	return &UnicodeNormalizeFilter{
+		form: form,
+	}, nil
+}
+
+func MustNewUnicodeNormalizeFilter(formName string) *UnicodeNormalizeFilter {
+	filter, err := NewUnicodeNormalizeFilter(formName)
+	if err != nil {
+		panic(err)
+	}
+	return filter
+}
+
+func (s *UnicodeNormalizeFilter) Filter(input analysis.TokenStream) analysis.TokenStream {
+	for _, token := range input {
+		token.Term = s.form.Bytes(token.Term)
+	}
+	return input
+}
+
+func UnicodeNormalizeFilterConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.TokenFilter, error) {
+	formVal, ok := config["form"].(string)
+	if !ok {
+		return nil, fmt.Errorf("must specify form")
+	}
+	form := formVal
+	return NewUnicodeNormalizeFilter(form)
+}
+
+func init() {
+	registry.RegisterTokenFilter(Name, UnicodeNormalizeFilterConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/character/character.go

@@ -1,76 +0,0 @@
-//  Copyright (c) 2016 Couchbase, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// 		http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package character
-
-import (
-	"unicode/utf8"
-
-	"github.com/blevesearch/bleve/analysis"
-)
-
-type IsTokenRune func(r rune) bool
-
-type CharacterTokenizer struct {
-	isTokenRun IsTokenRune
-}
-
-func NewCharacterTokenizer(f IsTokenRune) *CharacterTokenizer {
-	return &CharacterTokenizer{
-		isTokenRun: f,
-	}
-}
-
-func (c *CharacterTokenizer) Tokenize(input []byte) analysis.TokenStream {
-
-	rv := make(analysis.TokenStream, 0, 1024)
-
-	offset := 0
-	start := 0
-	end := 0
-	count := 0
-	for currRune, size := utf8.DecodeRune(input[offset:]); currRune != utf8.RuneError; currRune, size = utf8.DecodeRune(input[offset:]) {
-		isToken := c.isTokenRun(currRune)
-		if isToken {
-			end = offset + size
-		} else {
-			if end-start > 0 {
-				// build token
-				rv = append(rv, &analysis.Token{
-					Term:     input[start:end],
-					Start:    start,
-					End:      end,
-					Position: count + 1,
-					Type:     analysis.AlphaNumeric,
-				})
-				count++
-			}
-			start = offset + size
-			end = start
-		}
-		offset += size
-	}
-	// if we ended in the middle of a token, finish it
-	if end-start > 0 {
-		// build token
-		rv = append(rv, &analysis.Token{
-			Term:     input[start:end],
-			Start:    start,
-			End:      end,
-			Position: count + 1,
-			Type:     analysis.AlphaNumeric,
-		})
-	}
-	return rv
-}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/letter/letter.go

@@ -1,33 +0,0 @@
-//  Copyright (c) 2016 Couchbase, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// 		http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package letter
-
-import (
-	"unicode"
-
-	"github.com/blevesearch/bleve/analysis"
-	"github.com/blevesearch/bleve/analysis/tokenizer/character"
-	"github.com/blevesearch/bleve/registry"
-)
-
-const Name = "letter"
-
-func TokenizerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Tokenizer, error) {
-	return character.NewCharacterTokenizer(unicode.IsLetter), nil
-}
-
-func init() {
-	registry.RegisterTokenizer(Name, TokenizerConstructor)
-}

vendor/github.com/blevesearch/bleve/config_app.go

@@ -1,23 +0,0 @@
-//  Copyright (c) 2014 Couchbase, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// 		http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// +build appengine appenginevm
-
-package bleve
-
-// in the appengine environment we cannot support disk based indexes
-// so we do no extra configuration in this method
-func initDisk() {
-
-}

vendor/github.com/blevesearch/bleve/document/field_geopoint.go

@@ -0,0 +1,137 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package document
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/numeric"
+)
+
+var GeoPrecisionStep uint = 9
+
+type GeoPointField struct {
+	name              string
+	arrayPositions    []uint64
+	options           IndexingOptions
+	value             numeric.PrefixCoded
+	numPlainTextBytes uint64
+}
+
+func (n *GeoPointField) Name() string {
+	return n.name
+}
+
+func (n *GeoPointField) ArrayPositions() []uint64 {
+	return n.arrayPositions
+}
+
+func (n *GeoPointField) Options() IndexingOptions {
+	return n.options
+}
+
+func (n *GeoPointField) Analyze() (int, analysis.TokenFrequencies) {
+	tokens := make(analysis.TokenStream, 0)
+	tokens = append(tokens, &analysis.Token{
+		Start:    0,
+		End:      len(n.value),
+		Term:     n.value,
+		Position: 1,
+		Type:     analysis.Numeric,
+	})
+
+	original, err := n.value.Int64()
+	if err == nil {
+
+		shift := GeoPrecisionStep
+		for shift < 64 {
+			shiftEncoded, err := numeric.NewPrefixCodedInt64(original, shift)
+			if err != nil {
+				break
+			}
+			token := analysis.Token{
+				Start:    0,
+				End:      len(shiftEncoded),
+				Term:     shiftEncoded,
+				Position: 1,
+				Type:     analysis.Numeric,
+			}
+			tokens = append(tokens, &token)
+			shift += GeoPrecisionStep
+		}
+	}
+
+	fieldLength := len(tokens)
+	tokenFreqs := analysis.TokenFrequency(tokens, n.arrayPositions, n.options.IncludeTermVectors())
+	return fieldLength, tokenFreqs
+}
+
+func (n *GeoPointField) Value() []byte {
+	return n.value
+}
+
+func (n *GeoPointField) Lon() (float64, error) {
+	i64, err := n.value.Int64()
+	if err != nil {
+		return 0.0, err
+	}
+	return geo.MortonUnhashLon(uint64(i64)), nil
+}
+
+func (n *GeoPointField) Lat() (float64, error) {
+	i64, err := n.value.Int64()
+	if err != nil {
+		return 0.0, err
+	}
+	return geo.MortonUnhashLat(uint64(i64)), nil
+}
+
+func (n *GeoPointField) GoString() string {
+	return fmt.Sprintf("&document.GeoPointField{Name:%s, Options: %s, Value: %s}", n.name, n.options, n.value)
+}
+
+func (n *GeoPointField) NumPlainTextBytes() uint64 {
+	return n.numPlainTextBytes
+}
+
+func NewGeoPointFieldFromBytes(name string, arrayPositions []uint64, value []byte) *GeoPointField {
+	return &GeoPointField{
+		name:              name,
+		arrayPositions:    arrayPositions,
+		value:             value,
+		options:           DefaultNumericIndexingOptions,
+		numPlainTextBytes: uint64(len(value)),
+	}
+}
+
+func NewGeoPointField(name string, arrayPositions []uint64, lon, lat float64) *GeoPointField {
+	return NewGeoPointFieldWithIndexingOptions(name, arrayPositions, lon, lat, DefaultNumericIndexingOptions)
+}
+
+func NewGeoPointFieldWithIndexingOptions(name string, arrayPositions []uint64, lon, lat float64, options IndexingOptions) *GeoPointField {
+	mhash := geo.MortonHash(lon, lat)
+	prefixCoded := numeric.MustNewPrefixCodedInt64(int64(mhash), 0)
+	return &GeoPointField{
+		name:           name,
+		arrayPositions: arrayPositions,
+		value:          prefixCoded,
+		options:        options,
+		// not correct, just a place holder until we revisit how fields are
+		// represented and can fix this better
+		numPlainTextBytes: uint64(8),
+	}
+}

vendor/github.com/blevesearch/bleve/geo/README.md

@@ -0,0 +1,9 @@
+# geo support in bleve
+
+First, all of this geo code is a Go adaptation of the [Lucene 5.3.2 sandbox geo support](https://lucene.apache.org/core/5_3_2/sandbox/org/apache/lucene/util/package-summary.html).
+
+## Notes
+
+- All of the APIs will use float64 for lon/lat values.
+- When describing a point in function arguments or return values, we always use the order lon, lat.
+- High level APIs will use TopLeft and BottomRight to describe bounding boxes.  This may not map cleanly to min/max lon/lat when crossing the dateline.  The lower level APIs will use min/max lon/lat and require the higher-level code to split boxes accordingly.

vendor/github.com/blevesearch/bleve/geo/geo.go

@@ -0,0 +1,170 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package geo
+
+import (
+	"fmt"
+	"math"
+
+	"github.com/blevesearch/bleve/numeric"
+)
+
+// GeoBits is the number of bits used for a single geo point
+// Currently this is 32bits for lon and 32bits for lat
+var GeoBits uint = 32
+
+var minLon = -180.0
+var minLat = -90.0
+var maxLon = 180.0
+var maxLat = 90.0
+var minLonRad = minLon * degreesToRadian
+var minLatRad = minLat * degreesToRadian
+var maxLonRad = maxLon * degreesToRadian
+var maxLatRad = maxLat * degreesToRadian
+var geoTolerance = 1E-6
+var lonScale = float64((uint64(0x1)<<GeoBits)-1) / 360.0
+var latScale = float64((uint64(0x1)<<GeoBits)-1) / 180.0
+
+// MortonHash computes the morton hash value for the provided geo point
+// This point is ordered as lon, lat.
+func MortonHash(lon, lat float64) uint64 {
+	return numeric.Interleave(scaleLon(lon), scaleLat(lat))
+}
+
+func scaleLon(lon float64) uint64 {
+	rv := uint64((lon - minLon) * lonScale)
+	return rv
+}
+
+func scaleLat(lat float64) uint64 {
+	rv := uint64((lat - minLat) * latScale)
+	return rv
+}
+
+// MortonUnhashLon extracts the longitude value from the provided morton hash.
+func MortonUnhashLon(hash uint64) float64 {
+	return unscaleLon(numeric.Deinterleave(hash))
+}
+
+// MortonUnhashLat extracts the latitude value from the provided morton hash.
+func MortonUnhashLat(hash uint64) float64 {
+	return unscaleLat(numeric.Deinterleave(hash >> 1))
+}
+
+func unscaleLon(lon uint64) float64 {
+	return (float64(lon) / lonScale) + minLon
+}
+
+func unscaleLat(lat uint64) float64 {
+	return (float64(lat) / latScale) + minLat
+}
+
+// compareGeo will compare two float values and see if they are the same
+// taking into consideration a known geo tolerance.
+func compareGeo(a, b float64) float64 {
+	compare := a - b
+	if math.Abs(compare) <= geoTolerance {
+		return 0
+	}
+	return compare
+}
+
+// RectIntersects checks whether rectangles a and b intersect
+func RectIntersects(aMinX, aMinY, aMaxX, aMaxY, bMinX, bMinY, bMaxX, bMaxY float64) bool {
+	return !(aMaxX < bMinX || aMinX > bMaxX || aMaxY < bMinY || aMinY > bMaxY)
+}
+
+// RectWithin checks whether box a is within box b
+func RectWithin(aMinX, aMinY, aMaxX, aMaxY, bMinX, bMinY, bMaxX, bMaxY float64) bool {
+	rv := !(aMinX < bMinX || aMinY < bMinY || aMaxX > bMaxX || aMaxY > bMaxY)
+	return rv
+}
+
+// BoundingBoxContains checks whether the lon/lat point is within the box
+func BoundingBoxContains(lon, lat, minLon, minLat, maxLon, maxLat float64) bool {
+	return compareGeo(lon, minLon) >= 0 && compareGeo(lon, maxLon) <= 0 &&
+		compareGeo(lat, minLat) >= 0 && compareGeo(lat, maxLat) <= 0
+}
+
+const degreesToRadian = math.Pi / 180
+const radiansToDegrees = 180 / math.Pi
+
+// DegreesToRadians converts an angle in degrees to radians
+func DegreesToRadians(d float64) float64 {
+	return d * degreesToRadian
+}
+
+// RadiansToDegrees converts an angle in radians to degress
+func RadiansToDegrees(r float64) float64 {
+	return r * radiansToDegrees
+}
+
+var earthMeanRadiusMeters = 6371008.7714
+
+func RectFromPointDistance(lon, lat, dist float64) (float64, float64, float64, float64, error) {
+	err := checkLongitude(lon)
+	if err != nil {
+		return 0, 0, 0, 0, err
+	}
+	err = checkLatitude(lat)
+	if err != nil {
+		return 0, 0, 0, 0, err
+	}
+	radLon := DegreesToRadians(lon)
+	radLat := DegreesToRadians(lat)
+	radDistance := (dist + 7e-2) / earthMeanRadiusMeters
+
+	minLatL := radLat - radDistance
+	maxLatL := radLat + radDistance
+
+	var minLonL, maxLonL float64
+	if minLatL > minLatRad && maxLatL < maxLatRad {
+		deltaLon := asin(sin(radDistance) / cos(radLat))
+		minLonL = radLon - deltaLon
+		if minLonL < minLonRad {
+			minLonL += 2 * math.Pi
+		}
+		maxLonL = radLon + deltaLon
+		if maxLonL > maxLonRad {
+			maxLonL -= 2 * math.Pi
+		}
+	} else {
+		// pole is inside distance
+		minLatL = math.Max(minLatL, minLatRad)
+		maxLatL = math.Min(maxLatL, maxLatRad)
+		minLonL = minLonRad
+		maxLonL = maxLonRad
+	}
+
+	return RadiansToDegrees(minLonL),
+		RadiansToDegrees(maxLatL),
+		RadiansToDegrees(maxLonL),
+		RadiansToDegrees(minLatL),
+		nil
+}
+
+func checkLatitude(latitude float64) error {
+	if math.IsNaN(latitude) || latitude < minLat || latitude > maxLat {
+		return fmt.Errorf("invalid latitude %f; must be between %f and %f", latitude, minLat, maxLat)
+	}
+	return nil
+}
+
+func checkLongitude(longitude float64) error {
+	if math.IsNaN(longitude) || longitude < minLon || longitude > maxLon {
+		return fmt.Errorf("invalid longitude %f; must be between %f and %f", longitude, minLon, maxLon)
+	}
+	return nil
+}

vendor/github.com/blevesearch/bleve/geo/geo_dist.go

@@ -0,0 +1,98 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package geo
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+)
+
+type distanceUnit struct {
+	conv     float64
+	suffixes []string
+}
+
+var inch = distanceUnit{0.0254, []string{"in", "inch"}}
+var yard = distanceUnit{0.9144, []string{"yd", "yards"}}
+var feet = distanceUnit{0.3048, []string{"ft", "feet"}}
+var kilom = distanceUnit{1000, []string{"km", "kilometers"}}
+var nauticalm = distanceUnit{1852.0, []string{"nm", "nauticalmiles"}}
+var millim = distanceUnit{0.001, []string{"mm", "millimeters"}}
+var centim = distanceUnit{0.01, []string{"cm", "centimeters"}}
+var miles = distanceUnit{1609.344, []string{"mi", "miles"}}
+var meters = distanceUnit{1, []string{"m", "meters"}}
+
+var distanceUnits = []*distanceUnit{
+	&inch, &yard, &feet, &kilom, &nauticalm, &millim, &centim, &miles, &meters,
+}
+
+// ParseDistance attempts to parse a distance string and return distance in
+// meters.  Example formats supported:
+// "5in" "5inch" "7yd" "7yards" "9ft" "9feet" "11km" "11kilometers"
+// "3nm" "3nauticalmiles" "13mm" "13millimeters" "15cm" "15centimeters"
+// "17mi" "17miles" "19m" "19meters"
+// If the unit cannot be determined, the entire string is parsed and the
+// unit of meters is assumed.
+// If the number portion cannot be parsed, 0 and the parse error are returned.
+func ParseDistance(d string) (float64, error) {
+	for _, unit := range distanceUnits {
+		for _, unitSuffix := range unit.suffixes {
+			if strings.HasSuffix(d, unitSuffix) {
+				parsedNum, err := strconv.ParseFloat(d[0:len(d)-len(unitSuffix)], 64)
+				if err != nil {
+					return 0, err
+				}
+				return parsedNum * unit.conv, nil
+			}
+		}
+	}
+	// no unit matched, try assuming meters?
+	parsedNum, err := strconv.ParseFloat(d, 64)
+	if err != nil {
+		return 0, err
+	}
+	return parsedNum, nil
+}
+
+// ParseDistanceUnit attempts to parse a distance unit and return the
+// multiplier for converting this to meters.  If the unit cannot be parsed
+// then 0 and the error message is returned.
+func ParseDistanceUnit(u string) (float64, error) {
+	for _, unit := range distanceUnits {
+		for _, unitSuffix := range unit.suffixes {
+			if u == unitSuffix {
+				return unit.conv, nil
+			}
+		}
+	}
+	return 0, fmt.Errorf("unknown distance unit: %s", u)
+}
+
+// Haversin computes the distance between two points.
+// This implemenation uses the sloppy math implemenations which trade off
+// accuracy for performance.  The distance returned is in kilometers.
+func Haversin(lon1, lat1, lon2, lat2 float64) float64 {
+	x1 := lat1 * degreesToRadian
+	x2 := lat2 * degreesToRadian
+	h1 := 1 - cos(x1-x2)
+	h2 := 1 - cos((lon1-lon2)*degreesToRadian)
+	h := (h1 + cos(x1)*cos(x2)*h2) / 2
+	avgLat := (x1 + x2) / 2
+	diameter := earthDiameter(avgLat)
+
+	return diameter * asin(math.Min(1, math.Sqrt(h)))
+}

vendor/github.com/blevesearch/bleve/geo/parse.go

@@ -0,0 +1,140 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package geo
+
+import (
+	"reflect"
+	"strings"
+)
+
+// ExtractGeoPoint takes an arbitrary interface{} and tries it's best to
+// interpret it is as geo point.  Supported formats:
+// Container:
+// slice length 2 (GeoJSON)
+//  first element lon, second element lat
+// map[string]interface{}
+//  exact keys lat and lon or lng
+// struct
+//  w/exported fields case-insensitive match on lat and lon or lng
+// struct
+//  satisfying Later and Loner or Lnger interfaces
+//
+// in all cases values must be some sort of numeric-like thing: int/uint/float
+func ExtractGeoPoint(thing interface{}) (lon, lat float64, success bool) {
+	var foundLon, foundLat bool
+
+	thingVal := reflect.ValueOf(thing)
+	thingTyp := thingVal.Type()
+
+	// is it a slice
+	if thingVal.IsValid() && thingVal.Kind() == reflect.Slice {
+		// must be length 2
+		if thingVal.Len() == 2 {
+			first := thingVal.Index(0)
+			if first.CanInterface() {
+				firstVal := first.Interface()
+				lon, foundLon = extractNumericVal(firstVal)
+			}
+			second := thingVal.Index(1)
+			if second.CanInterface() {
+				secondVal := second.Interface()
+				lat, foundLat = extractNumericVal(secondVal)
+			}
+		}
+	}
+
+	// is it a map
+	if l, ok := thing.(map[string]interface{}); ok {
+		if lval, ok := l["lon"]; ok {
+			lon, foundLon = extractNumericVal(lval)
+		} else if lval, ok := l["lng"]; ok {
+			lon, foundLon = extractNumericVal(lval)
+		}
+		if lval, ok := l["lat"]; ok {
+			lat, foundLat = extractNumericVal(lval)
+		}
+	}
+
+	// now try reflection on struct fields
+	if thingVal.IsValid() && thingVal.Kind() == reflect.Struct {
+		for i := 0; i < thingVal.NumField(); i++ {
+			fieldName := thingTyp.Field(i).Name
+			if strings.HasPrefix(strings.ToLower(fieldName), "lon") {
+				if thingVal.Field(i).CanInterface() {
+					fieldVal := thingVal.Field(i).Interface()
+					lon, foundLon = extractNumericVal(fieldVal)
+				}
+			}
+			if strings.HasPrefix(strings.ToLower(fieldName), "lng") {
+				if thingVal.Field(i).CanInterface() {
+					fieldVal := thingVal.Field(i).Interface()
+					lon, foundLon = extractNumericVal(fieldVal)
+				}
+			}
+			if strings.HasPrefix(strings.ToLower(fieldName), "lat") {
+				if thingVal.Field(i).CanInterface() {
+					fieldVal := thingVal.Field(i).Interface()
+					lat, foundLat = extractNumericVal(fieldVal)
+				}
+			}
+		}
+	}
+
+	// last hope, some interfaces
+	// lon
+	if l, ok := thing.(loner); ok {
+		lon = l.Lon()
+		foundLon = true
+	} else if l, ok := thing.(lnger); ok {
+		lon = l.Lng()
+		foundLon = true
+	}
+	// lat
+	if l, ok := thing.(later); ok {
+		lat = l.Lat()
+		foundLat = true
+	}
+
+	return lon, lat, foundLon && foundLat
+}
+
+// extract numeric value (if possible) and returns a float64
+func extractNumericVal(v interface{}) (float64, bool) {
+	val := reflect.ValueOf(v)
+	typ := val.Type()
+	switch typ.Kind() {
+	case reflect.Float32, reflect.Float64:
+		return val.Float(), true
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return float64(val.Int()), true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return float64(val.Uint()), true
+	}
+
+	return 0, false
+}
+
+// various support interfaces which can be used to find lat/lon
+type loner interface {
+	Lon() float64
+}
+
+type later interface {
+	Lat() float64
+}
+
+type lnger interface {
+	Lng() float64
+}

vendor/github.com/blevesearch/bleve/geo/sloppy.go

@@ -0,0 +1,212 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package geo
+
+import (
+	"math"
+)
+
+var earthDiameterPerLatitude []float64
+var sinTab []float64
+var cosTab []float64
+var asinTab []float64
+var asinDer1DivF1Tab []float64
+var asinDer2DivF2Tab []float64
+var asinDer3DivF3Tab []float64
+var asinDer4DivF4Tab []float64
+
+const radiusTabsSize = (1 << 10) + 1
+const radiusDelta = (math.Pi / 2) / (radiusTabsSize - 1)
+const radiusIndexer = 1 / radiusDelta
+const sinCosTabsSize = (1 << 11) + 1
+const asinTabsSize = (1 << 13) + 1
+const oneDivF2 = 1 / 2.0
+const oneDivF3 = 1 / 6.0
+const oneDivF4 = 1 / 24.0
+
+// 1.57079632673412561417e+00 first 33 bits of pi/2
+var pio2Hi = math.Float64frombits(0x3FF921FB54400000)
+
+// 6.07710050650619224932e-11 pi/2 - PIO2_HI
+var pio2Lo = math.Float64frombits(0x3DD0B4611A626331)
+
+var asinPio2Hi = math.Float64frombits(0x3FF921FB54442D18) // 1.57079632679489655800e+00
+var asinPio2Lo = math.Float64frombits(0x3C91A62633145C07) // 6.12323399573676603587e-17
+var asinPs0 = math.Float64frombits(0x3fc5555555555555)    //  1.66666666666666657415e-01
+var asinPs1 = math.Float64frombits(0xbfd4d61203eb6f7d)    // -3.25565818622400915405e-01
+var asinPs2 = math.Float64frombits(0x3fc9c1550e884455)    //  2.01212532134862925881e-01
+var asinPs3 = math.Float64frombits(0xbfa48228b5688f3b)    // -4.00555345006794114027e-02
+var asinPs4 = math.Float64frombits(0x3f49efe07501b288)    //  7.91534994289814532176e-04
+var asinPs5 = math.Float64frombits(0x3f023de10dfdf709)    //  3.47933107596021167570e-05
+var asinQs1 = math.Float64frombits(0xc0033a271c8a2d4b)    // -2.40339491173441421878e+00
+var asinQs2 = math.Float64frombits(0x40002ae59c598ac8)    //  2.02094576023350569471e+00
+var asinQs3 = math.Float64frombits(0xbfe6066c1b8d0159)    // -6.88283971605453293030e-01
+var asinQs4 = math.Float64frombits(0x3fb3b8c5b12e9282)    //  7.70381505559019352791e-02
+
+var twoPiHi = 4 * pio2Hi
+var twoPiLo = 4 * pio2Lo
+var sinCosDeltaHi = twoPiHi/sinCosTabsSize - 1
+var sinCosDeltaLo = twoPiLo/sinCosTabsSize - 1
+var sinCosIndexer = 1 / (sinCosDeltaHi + sinCosDeltaLo)
+var sinCosMaxValueForIntModulo = ((math.MaxInt64 >> 9) / sinCosIndexer) * 0.99
+var asinMaxValueForTabs = math.Sin(73.0 * degreesToRadian)
+
+var asinDelta = asinMaxValueForTabs / (asinTabsSize - 1)
+var asinIndexer = 1 / asinDelta
+
+func init() {
+	// initializes the tables used for the sloppy math functions
+
+	// sin and cos
+	sinTab = make([]float64, sinCosTabsSize)
+	cosTab = make([]float64, sinCosTabsSize)
+	sinCosPiIndex := (sinCosTabsSize - 1) / 2
+	sinCosPiMul2Index := 2 * sinCosPiIndex
+	sinCosPiMul05Index := sinCosPiIndex / 2
+	sinCosPiMul15Index := 3 * sinCosPiIndex / 2
+	for i := 0; i < sinCosTabsSize; i++ {
+		// angle: in [0,2*PI].
+		angle := float64(i)*sinCosDeltaHi + float64(i)*sinCosDeltaLo
+		sinAngle := math.Sin(angle)
+		cosAngle := math.Cos(angle)
+		// For indexes corresponding to null cosine or sine, we make sure the value is zero
+		// and not an epsilon. This allows for a much better accuracy for results close to zero.
+		if i == sinCosPiIndex {
+			sinAngle = 0.0
+		} else if i == sinCosPiMul2Index {
+			sinAngle = 0.0
+		} else if i == sinCosPiMul05Index {
+			sinAngle = 0.0
+		} else if i == sinCosPiMul15Index {
+			sinAngle = 0.0
+		}
+		sinTab[i] = sinAngle
+		cosTab[i] = cosAngle
+	}
+
+	// asin
+	asinTab = make([]float64, asinTabsSize)
+	asinDer1DivF1Tab = make([]float64, asinTabsSize)
+	asinDer2DivF2Tab = make([]float64, asinTabsSize)
+	asinDer3DivF3Tab = make([]float64, asinTabsSize)
+	asinDer4DivF4Tab = make([]float64, asinTabsSize)
+	for i := 0; i < asinTabsSize; i++ {
+		// x: in [0,ASIN_MAX_VALUE_FOR_TABS].
+		x := float64(i) * asinDelta
+		asinTab[i] = math.Asin(x)
+		oneMinusXSqInv := 1.0 / (1 - x*x)
+		oneMinusXSqInv05 := math.Sqrt(oneMinusXSqInv)
+		oneMinusXSqInv15 := oneMinusXSqInv05 * oneMinusXSqInv
+		oneMinusXSqInv25 := oneMinusXSqInv15 * oneMinusXSqInv
+		oneMinusXSqInv35 := oneMinusXSqInv25 * oneMinusXSqInv
+		asinDer1DivF1Tab[i] = oneMinusXSqInv05
+		asinDer2DivF2Tab[i] = (x * oneMinusXSqInv15) * oneDivF2
+		asinDer3DivF3Tab[i] = ((1 + 2*x*x) * oneMinusXSqInv25) * oneDivF3
+		asinDer4DivF4Tab[i] = ((5 + 2*x*(2+x*(5-2*x))) * oneMinusXSqInv35) * oneDivF4
+	}
+
+	// earth radius
+	a := 6378137.0
+	b := 6356752.31420
+	a2 := a * a
+	b2 := b * b
+	earthDiameterPerLatitude = make([]float64, radiusTabsSize)
+	earthDiameterPerLatitude[0] = 2.0 * a / 1000
+	earthDiameterPerLatitude[radiusTabsSize-1] = 2.0 * b / 1000
+	for i := 1; i < radiusTabsSize-1; i++ {
+		lat := math.Pi * float64(i) / (2*radiusTabsSize - 1)
+		one := math.Pow(a2*math.Cos(lat), 2)
+		two := math.Pow(b2*math.Sin(lat), 2)
+		three := math.Pow(float64(a)*math.Cos(lat), 2)
+		four := math.Pow(b*math.Sin(lat), 2)
+		radius := math.Sqrt((one + two) / (three + four))
+		earthDiameterPerLatitude[i] = 2 * radius / 1000
+	}
+}
+
+// earthDiameter returns an estimation of the earth's diameter at the specified
+// latitude in kilometers
+func earthDiameter(lat float64) float64 {
+	index := math.Mod(math.Abs(lat)*radiusIndexer+0.5, float64(len(earthDiameterPerLatitude)))
+	if math.IsNaN(index) {
+		return 0
+	}
+	return earthDiameterPerLatitude[int(index)]
+}
+
+var pio2 = math.Pi / 2
+
+func sin(a float64) float64 {
+	return cos(a - pio2)
+}
+
+// cos is a sloppy math (faster) implementation of math.Cos
+func cos(a float64) float64 {
+	if a < 0.0 {
+		a = -a
+	}
+	if a > sinCosMaxValueForIntModulo {
+		return math.Cos(a)
+	}
+	// index: possibly outside tables range.
+	index := int(a*sinCosIndexer + 0.5)
+	delta := (a - float64(index)*sinCosDeltaHi) - float64(index)*sinCosDeltaLo
+	// Making sure index is within tables range.
+	// Last value of each table is the same than first, so we ignore it (tabs size minus one) for modulo.
+	index &= (sinCosTabsSize - 2) // index % (SIN_COS_TABS_SIZE-1)
+	indexCos := cosTab[index]
+	indexSin := sinTab[index]
+	return indexCos + delta*(-indexSin+delta*(-indexCos*oneDivF2+delta*(indexSin*oneDivF3+delta*indexCos*oneDivF4)))
+}
+
+// asin is a sloppy math (faster) implementation of math.Asin
+func asin(a float64) float64 {
+	var negateResult bool
+	if a < 0 {
+		a = -a
+		negateResult = true
+	}
+	if a <= asinMaxValueForTabs {
+		index := int(a*asinIndexer + 0.5)
+		delta := a - float64(index)*asinDelta
+		result := asinTab[index] + delta*(asinDer1DivF1Tab[index]+delta*(asinDer2DivF2Tab[index]+delta*(asinDer3DivF3Tab[index]+delta*asinDer4DivF4Tab[index])))
+		if negateResult {
+			return -result
+		}
+		return result
+	}
+	// value > ASIN_MAX_VALUE_FOR_TABS, or value is NaN
+	// This part is derived from fdlibm.
+	if a < 1 {
+		t := (1.0 - a) * 0.5
+		p := t * (asinPs0 + t*(asinPs1+t*(asinPs2+t*(asinPs3+t*(asinPs4+t+asinPs5)))))
+		q := 1.0 + t*(asinQs1+t*(asinQs2+t*(asinQs3+t*asinQs4)))
+		s := math.Sqrt(t)
+		z := s + s*(p/q)
+		result := asinPio2Hi - ((z + z) - asinPio2Lo)
+		if negateResult {
+			return -result
+		}
+		return result
+	}
+	// value >= 1.0, or value is NaN
+	if a == 1.0 {
+		if negateResult {
+			return -math.Pi / 2
+		}
+		return math.Pi / 2
+	}
+	return math.NaN()
+}

vendor/github.com/blevesearch/bleve/index.go

@@ -49,6 +49,17 @@ func (b *Batch) Index(id string, data interface{}) error {
 	return nil
 }
 
+// IndexAdvanced adds the specified index operation to the
+// batch which skips the mapping.  NOTE: the bleve Index is not updated
+// until the batch is executed.
+func (b *Batch) IndexAdvanced(doc *document.Document) (err error) {
+	if doc.ID == "" {
+		return ErrorEmptyID
+	}
+	b.internal.Update(doc)
+	return nil
+}
+
 // Delete adds the specified delete operation to the
 // batch.  NOTE: the bleve Index is not updated until
 // the batch is executed.
@@ -99,12 +110,15 @@ func (b *Batch) Reset() {
 // them.
 //
 // The DocumentMapping used to index a value is deduced by the following rules:
-// 1) If value implements Classifier interface, resolve the mapping from Type().
-// 2) If value has a string field or value at IndexMapping.TypeField.
+// 1) If value implements mapping.bleveClassifier interface, resolve the mapping
+//    from BleveType().
+// 2) If value implements mapping.Classifier interface, resolve the mapping
+//    from Type().
+// 3) If value has a string field or value at IndexMapping.TypeField.
 // (defaulting to "_type"), use it to resolve the mapping. Fields addressing
 // is described below.
-// 3) If IndexMapping.DefaultType is registered, return it.
-// 4) Return IndexMapping.DefaultMapping.
+// 4) If IndexMapping.DefaultType is registered, return it.
+// 5) Return IndexMapping.DefaultMapping.
 //
 // Each field or nested field of the value is identified by a string path, then
 // mapped to one or several FieldMappings which extract the result for analysis.

vendor/github.com/blevesearch/bleve/index/index.go

@@ -48,6 +48,8 @@ type Index interface {
 	Advanced() (store.KVStore, error)
 }
 
+type DocumentFieldTermVisitor func(field string, term []byte)
+
 type IndexReader interface {
 	TermFieldReader(term []byte, field string, includeFreq, includeNorm, includeTermVectors bool) (TermFieldReader, error)
 
@@ -64,7 +66,7 @@ type IndexReader interface {
 	FieldDictPrefix(field string, termPrefix []byte) (FieldDict, error)
 
 	Document(id string) (*document.Document, error)
-	DocumentFieldTerms(id IndexInternalID, fields []string) (FieldTerms, error)
+	DocumentVisitFieldTerms(id IndexInternalID, fields []string, visitor DocumentFieldTermVisitor) error
 
 	Fields() ([]string, error)
 

vendor/github.com/blevesearch/bleve/index/upsidedown/analysis.go

@@ -90,7 +90,7 @@ func (udc *UpsideDownCouch) Analyze(d *document.Document) *index.AnalysisResult
 
 	rv.Rows = append(make([]index.IndexRow, 0, rowsCapNeeded), rv.Rows...)
 
-	backIndexTermEntries := make([]*BackIndexTermEntry, 0, rowsCapNeeded)
+	backIndexTermsEntries := make([]*BackIndexTermsEntry, 0, len(fieldTermFreqs))
 
 	// walk through the collated information and process
 	// once for each indexed field (unique name)
@@ -99,11 +99,11 @@ func (udc *UpsideDownCouch) Analyze(d *document.Document) *index.AnalysisResult
 		includeTermVectors := fieldIncludeTermVectors[fieldIndex]
 
 		// encode this field
-		rv.Rows, backIndexTermEntries = udc.indexField(docIDBytes, includeTermVectors, fieldIndex, fieldLength, tokenFreqs, rv.Rows, backIndexTermEntries)
+		rv.Rows, backIndexTermsEntries = udc.indexField(docIDBytes, includeTermVectors, fieldIndex, fieldLength, tokenFreqs, rv.Rows, backIndexTermsEntries)
 	}
 
 	// build the back index row
-	backIndexRow := NewBackIndexRow(docIDBytes, backIndexTermEntries, backIndexStoredEntries)
+	backIndexRow := NewBackIndexRow(docIDBytes, backIndexTermsEntries, backIndexStoredEntries)
 	rv.Rows = append(rv.Rows, backIndexRow)
 
 	return rv

vendor/github.com/blevesearch/bleve/index/upsidedown/dump.go

@@ -127,10 +127,12 @@ func (i *IndexReader) DumpDoc(id string) chan interface{} {
 		}
 		// build sorted list of term keys
 		keys := make(keyset, 0)
-		for _, entry := range back.termEntries {
-			tfr := NewTermFrequencyRow([]byte(*entry.Term), uint16(*entry.Field), idBytes, 0, 0)
-			key := tfr.Key()
-			keys = append(keys, key)
+		for _, entry := range back.termsEntries {
+			for i := range entry.Terms {
+				tfr := NewTermFrequencyRow([]byte(entry.Terms[i]), uint16(*entry.Field), idBytes, 0, 0)
+				key := tfr.Key()
+				keys = append(keys, key)
+			}
 		}
 		sort.Sort(keys)
 

vendor/github.com/blevesearch/bleve/index/upsidedown/index_reader.go

@@ -101,15 +101,7 @@ func (i *IndexReader) Document(id string) (doc *document.Document, err error) {
 	return
 }
 
-func (i *IndexReader) DocumentFieldTerms(id index.IndexInternalID, fields []string) (index.FieldTerms, error) {
-	back, err := backIndexRowForDoc(i.kvreader, id)
-	if err != nil {
-		return nil, err
-	}
-	if back == nil {
-		return nil, nil
-	}
-	rv := make(index.FieldTerms, len(fields))
+func (i *IndexReader) DocumentVisitFieldTerms(id index.IndexInternalID, fields []string, visitor index.DocumentFieldTermVisitor) error {
 	fieldsMap := make(map[uint16]string, len(fields))
 	for _, f := range fields {
 		id, ok := i.index.fieldCache.FieldNamed(f, false)
@@ -117,12 +109,34 @@ func (i *IndexReader) DocumentFieldTerms(id index.IndexInternalID, fields []stri
 			fieldsMap[id] = f
 		}
 	}
-	for _, entry := range back.termEntries {
-		if field, ok := fieldsMap[uint16(*entry.Field)]; ok {
-			rv[field] = append(rv[field], *entry.Term)
-		}
+
+	tempRow := BackIndexRow{
+		doc: id,
+	}
+
+	keyBuf := GetRowBuffer()
+	if tempRow.KeySize() > len(keyBuf) {
+		keyBuf = make([]byte, 2*tempRow.KeySize())
 	}
-	return rv, nil
+	defer PutRowBuffer(keyBuf)
+	keySize, err := tempRow.KeyTo(keyBuf)
+	if err != nil {
+		return err
+	}
+
+	value, err := i.kvreader.Get(keyBuf[:keySize])
+	if err != nil {
+		return err
+	}
+	if value == nil {
+		return nil
+	}
+
+	return visitBackIndexRow(value, func(field uint32, term []byte) {
+		if field, ok := fieldsMap[uint16(field)]; ok {
+			visitor(field, term)
+		}
+	})
 }
 
 func (i *IndexReader) Fields() (fields []string, err error) {

vendor/github.com/blevesearch/bleve/index/upsidedown/reader.go

@@ -24,46 +24,57 @@ import (
 )
 
 type UpsideDownCouchTermFieldReader struct {
-	count       uint64
-	indexReader *IndexReader
-	iterator    store.KVIterator
-	term        []byte
-	tfrNext     *TermFrequencyRow
-	keyBuf      []byte
-	field       uint16
+	count              uint64
+	indexReader        *IndexReader
+	iterator           store.KVIterator
+	term               []byte
+	tfrNext            *TermFrequencyRow
+	tfrPrealloc        TermFrequencyRow
+	keyBuf             []byte
+	field              uint16
+	includeTermVectors bool
 }
 
 func newUpsideDownCouchTermFieldReader(indexReader *IndexReader, term []byte, field uint16, includeFreq, includeNorm, includeTermVectors bool) (*UpsideDownCouchTermFieldReader, error) {
-	dictionaryRow := NewDictionaryRow(term, field, 0)
-	val, err := indexReader.kvreader.Get(dictionaryRow.Key())
+	bufNeeded := termFrequencyRowKeySize(term, nil)
+	if bufNeeded < dictionaryRowKeySize(term) {
+		bufNeeded = dictionaryRowKeySize(term)
+	}
+	buf := make([]byte, bufNeeded)
+
+	bufUsed := dictionaryRowKeyTo(buf, field, term)
+	val, err := indexReader.kvreader.Get(buf[:bufUsed])
 	if err != nil {
 		return nil, err
 	}
 	if val == nil {
 		atomic.AddUint64(&indexReader.index.stats.termSearchersStarted, uint64(1))
-		return &UpsideDownCouchTermFieldReader{
-			count:   0,
-			term:    term,
-			tfrNext: &TermFrequencyRow{},
-			field:   field,
-		}, nil
+		rv := &UpsideDownCouchTermFieldReader{
+			count:              0,
+			term:               term,
+			field:              field,
+			includeTermVectors: includeTermVectors,
+		}
+		rv.tfrNext = &rv.tfrPrealloc
+		return rv, nil
 	}
 
-	err = dictionaryRow.parseDictionaryV(val)
+	count, err := dictionaryRowParseV(val)
 	if err != nil {
 		return nil, err
 	}
 
-	tfr := NewTermFrequencyRow(term, field, []byte{}, 0, 0)
-	it := indexReader.kvreader.PrefixIterator(tfr.Key())
+	bufUsed = termFrequencyRowKeyTo(buf, field, term, nil)
+	it := indexReader.kvreader.PrefixIterator(buf[:bufUsed])
 
 	atomic.AddUint64(&indexReader.index.stats.termSearchersStarted, uint64(1))
 	return &UpsideDownCouchTermFieldReader{
-		indexReader: indexReader,
-		iterator:    it,
-		count:       dictionaryRow.count,
-		term:        term,
-		field:       field,
+		indexReader:        indexReader,
+		iterator:           it,
+		count:              count,
+		term:               term,
+		field:              field,
+		includeTermVectors: includeTermVectors,
 	}, nil
 }
 
@@ -79,7 +90,7 @@ func (r *UpsideDownCouchTermFieldReader) Next(preAlloced *index.TermFieldDoc) (*
 		if r.tfrNext != nil {
 			r.iterator.Next()
 		} else {
-			r.tfrNext = &TermFrequencyRow{}
+			r.tfrNext = &r.tfrPrealloc
 		}
 		key, val, valid := r.iterator.Current()
 		if valid {
@@ -88,7 +99,7 @@ func (r *UpsideDownCouchTermFieldReader) Next(preAlloced *index.TermFieldDoc) (*
 			if err != nil {
 				return nil, err
 			}
-			err = tfr.parseV(val)
+			err = tfr.parseV(val, r.includeTermVectors)
 			if err != nil {
 				return nil, err
 			}
@@ -125,7 +136,7 @@ func (r *UpsideDownCouchTermFieldReader) Advance(docID index.IndexInternalID, pr
 			if err != nil {
 				return nil, err
 			}
-			err = tfr.parseV(val)
+			err = tfr.parseV(val, r.includeTermVectors)
 			if err != nil {
 				return nil, err
 			}

vendor/github.com/blevesearch/bleve/index/upsidedown/row.go

@@ -254,14 +254,22 @@ func (dr *DictionaryRow) Key() []byte {
 }
 
 func (dr *DictionaryRow) KeySize() int {
-	return len(dr.term) + 3
+	return dictionaryRowKeySize(dr.term)
+}
+
+func dictionaryRowKeySize(term []byte) int {
+	return len(term) + 3
 }
 
 func (dr *DictionaryRow) KeyTo(buf []byte) (int, error) {
+	return dictionaryRowKeyTo(buf, dr.field, dr.term), nil
+}
+
+func dictionaryRowKeyTo(buf []byte, field uint16, term []byte) int {
 	buf[0] = 'd'
-	binary.LittleEndian.PutUint16(buf[1:3], dr.field)
-	size := copy(buf[3:], dr.term)
-	return size + 3, nil
+	binary.LittleEndian.PutUint16(buf[1:3], field)
+	size := copy(buf[3:], term)
+	return size + 3
 }
 
 func (dr *DictionaryRow) Value() []byte {
@@ -324,14 +332,22 @@ func (dr *DictionaryRow) parseDictionaryK(key []byte) error {
 }
 
 func (dr *DictionaryRow) parseDictionaryV(value []byte) error {
-	count, nread := binary.Uvarint(value)
-	if nread <= 0 {
-		return fmt.Errorf("DictionaryRow parse Uvarint error, nread: %d", nread)
+	count, err := dictionaryRowParseV(value)
+	if err != nil {
+		return err
 	}
 	dr.count = count
 	return nil
 }
 
+func dictionaryRowParseV(value []byte) (uint64, error) {
+	count, nread := binary.Uvarint(value)
+	if nread <= 0 {
+		return 0, fmt.Errorf("DictionaryRow parse Uvarint error, nread: %d", nread)
+	}
+	return count, nil
+}
+
 // TERM FIELD FREQUENCY
 
 type TermVector struct {
@@ -394,16 +410,24 @@ func (tfr *TermFrequencyRow) Key() []byte {
 }
 
 func (tfr *TermFrequencyRow) KeySize() int {
-	return 3 + len(tfr.term) + 1 + len(tfr.doc)
+	return termFrequencyRowKeySize(tfr.term, tfr.doc)
+}
+
+func termFrequencyRowKeySize(term, doc []byte) int {
+	return 3 + len(term) + 1 + len(doc)
 }
 
 func (tfr *TermFrequencyRow) KeyTo(buf []byte) (int, error) {
+	return termFrequencyRowKeyTo(buf, tfr.field, tfr.term, tfr.doc), nil
+}
+
+func termFrequencyRowKeyTo(buf []byte, field uint16, term, doc []byte) int {
 	buf[0] = 't'
-	binary.LittleEndian.PutUint16(buf[1:3], tfr.field)
-	termLen := copy(buf[3:], tfr.term)
+	binary.LittleEndian.PutUint16(buf[1:3], field)
+	termLen := copy(buf[3:], term)
 	buf[3+termLen] = ByteSeparator
-	docLen := copy(buf[3+termLen+1:], tfr.doc)
-	return 3 + termLen + 1 + docLen, nil
+	docLen := copy(buf[3+termLen+1:], doc)
+	return 3 + termLen + 1 + docLen
 }
 
 func (tfr *TermFrequencyRow) KeyAppendTo(buf []byte) ([]byte, error) {
@@ -538,7 +562,7 @@ func (tfr *TermFrequencyRow) parseKDoc(key []byte, term []byte) error {
 	return nil
 }
 
-func (tfr *TermFrequencyRow) parseV(value []byte) error {
+func (tfr *TermFrequencyRow) parseV(value []byte, includeTermVectors bool) error {
 	var bytesRead int
 	tfr.freq, bytesRead = binary.Uvarint(value)
 	if bytesRead <= 0 {
@@ -556,6 +580,10 @@ func (tfr *TermFrequencyRow) parseV(value []byte) error {
 	tfr.norm = math.Float32frombits(uint32(norm))
 
 	tfr.vectors = nil
+	if !includeTermVectors {
+		return nil
+	}
+
 	var field uint64
 	field, bytesRead = binary.Uvarint(value[currOffset:])
 	for bytesRead > 0 {
@@ -620,7 +648,7 @@ func NewTermFrequencyRowKV(key, value []byte) (*TermFrequencyRow, error) {
 		return nil, err
 	}
 
-	err = rv.parseV(value)
+	err = rv.parseV(value, true)
 	if err != nil {
 		return nil, err
 	}
@@ -630,7 +658,7 @@ func NewTermFrequencyRowKV(key, value []byte) (*TermFrequencyRow, error) {
 
 type BackIndexRow struct {
 	doc           []byte
-	termEntries   []*BackIndexTermEntry
+	termsEntries  []*BackIndexTermsEntry
 	storedEntries []*BackIndexStoreEntry
 }
 
@@ -638,10 +666,12 @@ func (br *BackIndexRow) AllTermKeys() [][]byte {
 	if br == nil {
 		return nil
 	}
-	rv := make([][]byte, len(br.termEntries))
-	for i, termEntry := range br.termEntries {
-		termRow := NewTermFrequencyRow([]byte(termEntry.GetTerm()), uint16(termEntry.GetField()), br.doc, 0, 0)
-		rv[i] = termRow.Key()
+	rv := make([][]byte, 0, len(br.termsEntries)) // FIXME this underestimates severely
+	for _, termsEntry := range br.termsEntries {
+		for i := range termsEntry.Terms {
+			termRow := NewTermFrequencyRow([]byte(termsEntry.Terms[i]), uint16(termsEntry.GetField()), br.doc, 0, 0)
+			rv = append(rv, termRow.Key())
+		}
 	}
 	return rv
 }
@@ -682,7 +712,7 @@ func (br *BackIndexRow) Value() []byte {
 
 func (br *BackIndexRow) ValueSize() int {
 	birv := &BackIndexRowValue{
-		TermEntries:   br.termEntries,
+		TermsEntries:  br.termsEntries,
 		StoredEntries: br.storedEntries,
 	}
 	return birv.Size()
@@ -690,20 +720,20 @@ func (br *BackIndexRow) ValueSize() int {
 
 func (br *BackIndexRow) ValueTo(buf []byte) (int, error) {
 	birv := &BackIndexRowValue{
-		TermEntries:   br.termEntries,
+		TermsEntries:  br.termsEntries,
 		StoredEntries: br.storedEntries,
 	}
 	return birv.MarshalTo(buf)
 }
 
 func (br *BackIndexRow) String() string {
-	return fmt.Sprintf("Backindex DocId: `%s` Term Entries: %v, Stored Entries: %v", string(br.doc), br.termEntries, br.storedEntries)
+	return fmt.Sprintf("Backindex DocId: `%s` Terms Entries: %v, Stored Entries: %v", string(br.doc), br.termsEntries, br.storedEntries)
 }
 
-func NewBackIndexRow(docID []byte, entries []*BackIndexTermEntry, storedFields []*BackIndexStoreEntry) *BackIndexRow {
+func NewBackIndexRow(docID []byte, entries []*BackIndexTermsEntry, storedFields []*BackIndexStoreEntry) *BackIndexRow {
 	return &BackIndexRow{
 		doc:           docID,
-		termEntries:   entries,
+		termsEntries:  entries,
 		storedEntries: storedFields,
 	}
 }
@@ -732,7 +762,7 @@ func NewBackIndexRowKV(key, value []byte) (*BackIndexRow, error) {
 	if err != nil {
 		return nil, err
 	}
-	rv.termEntries = birv.TermEntries
+	rv.termsEntries = birv.TermsEntries
 	rv.storedEntries = birv.StoredEntries
 
 	return &rv, nil
@@ -851,3 +881,232 @@ func NewStoredRowKV(key, value []byte) (*StoredRow, error) {
 	rv.value = value[1:]
 	return rv, nil
 }
+
+type backIndexFieldTermVisitor func(field uint32, term []byte)
+
+// visitBackIndexRow is designed to process a protobuf encoded
+// value, without creating unnecessary garbage.  Instead values are passed
+// to a callback, inspected first, and only copied if necessary.
+// Due to the fact that this borrows from generated code, it must be marnually
+// updated if the protobuf definition changes.
+//
+// This code originates from:
+// func (m *BackIndexRowValue) Unmarshal(data []byte) error
+// the sections which create garbage or parse unintersting sections
+// have been commented out.  This was done by design to allow for easier
+// merging in the future if that original function is regenerated
+func visitBackIndexRow(data []byte, callback backIndexFieldTermVisitor) error {
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TermsEntries", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + msglen
+			if msglen < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			// dont parse term entries
+			// m.TermsEntries = append(m.TermsEntries, &BackIndexTermsEntry{})
+			// if err := m.TermsEntries[len(m.TermsEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
+			// 	return err
+			// }
+			// instead, inspect them
+			if err := visitBackIndexRowFieldTerms(data[iNdEx:postIndex], callback); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field StoredEntries", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + msglen
+			if msglen < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			// don't parse stored entries
+			// m.StoredEntries = append(m.StoredEntries, &BackIndexStoreEntry{})
+			// if err := m.StoredEntries[len(m.StoredEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
+			// 	return err
+			// }
+			iNdEx = postIndex
+		default:
+			var sizeOfWire int
+			for {
+				sizeOfWire++
+				wire >>= 7
+				if wire == 0 {
+					break
+				}
+			}
+			iNdEx -= sizeOfWire
+			skippy, err := skipUpsidedown(data[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			// don't track unrecognized data
+			//m.XXX_unrecognized = append(m.XXX_unrecognized, data[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	return nil
+}
+
+// visitBackIndexRowFieldTerms is designed to process a protobuf encoded
+// sub-value within the BackIndexRowValue, without creating unnecessary garbage.
+// Instead values are passed to a callback, inspected first, and only copied if
+// necessary.  Due to the fact that this borrows from generated code, it must
+// be marnually updated if the protobuf definition changes.
+//
+// This code originates from:
+// func (m *BackIndexTermsEntry) Unmarshal(data []byte) error {
+// the sections which create garbage or parse uninteresting sections
+// have been commented out.  This was done by design to allow for easier
+// merging in the future if that original function is regenerated
+func visitBackIndexRowFieldTerms(data []byte, callback backIndexFieldTermVisitor) error {
+	var theField uint32
+
+	var hasFields [1]uint64
+	l := len(data)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := data[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Field", wireType)
+			}
+			var v uint32
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				v |= (uint32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			// m.Field = &v
+			theField = v
+			hasFields[0] |= uint64(0x00000001)
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Terms", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := data[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			postIndex := iNdEx + int(stringLen)
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			//m.Terms = append(m.Terms, string(data[iNdEx:postIndex]))
+			callback(theField, data[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			var sizeOfWire int
+			for {
+				sizeOfWire++
+				wire >>= 7
+				if wire == 0 {
+					break
+				}
+			}
+			iNdEx -= sizeOfWire
+			skippy, err := skipUpsidedown(data[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthUpsidedown
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			//m.XXX_unrecognized = append(m.XXX_unrecognized, data[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+	// if hasFields[0]&uint64(0x00000001) == 0 {
+	// 	return new(github_com_golang_protobuf_proto.RequiredNotSetError)
+	// }
+
+	return nil
+}

vendor/github.com/blevesearch/bleve/index/upsidedown/upsidedown.go

@@ -45,7 +45,7 @@ const RowBufferSize = 4 * 1024
 
 var VersionKey = []byte{'v'}
 
-const Version uint8 = 5
+const Version uint8 = 7
 
 var IncompatibleVersion = fmt.Errorf("incompatible version, %d is supported", Version)
 
@@ -499,44 +499,65 @@ func (udc *UpsideDownCouch) Update(doc *document.Document) (err error) {
 
 func (udc *UpsideDownCouch) mergeOldAndNew(backIndexRow *BackIndexRow, rows []index.IndexRow) (addRows []UpsideDownCouchRow, updateRows []UpsideDownCouchRow, deleteRows []UpsideDownCouchRow) {
 	addRows = make([]UpsideDownCouchRow, 0, len(rows))
+
+	if backIndexRow == nil {
+		addRows = addRows[0:len(rows)]
+		for i, row := range rows {
+			addRows[i] = row
+		}
+		return addRows, nil, nil
+	}
+
 	updateRows = make([]UpsideDownCouchRow, 0, len(rows))
 	deleteRows = make([]UpsideDownCouchRow, 0, len(rows))
 
-	existingTermKeys := make(map[string]bool)
-	for _, key := range backIndexRow.AllTermKeys() {
-		existingTermKeys[string(key)] = true
+	var existingTermKeys map[string]struct{}
+	backIndexTermKeys := backIndexRow.AllTermKeys()
+	if len(backIndexTermKeys) > 0 {
+		existingTermKeys = make(map[string]struct{}, len(backIndexTermKeys))
+		for _, key := range backIndexTermKeys {
+			existingTermKeys[string(key)] = struct{}{}
+		}
 	}
 
-	existingStoredKeys := make(map[string]bool)
-	for _, key := range backIndexRow.AllStoredKeys() {
-		existingStoredKeys[string(key)] = true
+	var existingStoredKeys map[string]struct{}
+	backIndexStoredKeys := backIndexRow.AllStoredKeys()
+	if len(backIndexStoredKeys) > 0 {
+		existingStoredKeys = make(map[string]struct{}, len(backIndexStoredKeys))
+		for _, key := range backIndexStoredKeys {
+			existingStoredKeys[string(key)] = struct{}{}
+		}
 	}
 
 	keyBuf := GetRowBuffer()
 	for _, row := range rows {
 		switch row := row.(type) {
 		case *TermFrequencyRow:
-			if row.KeySize() > len(keyBuf) {
-				keyBuf = make([]byte, row.KeySize())
-			}
-			keySize, _ := row.KeyTo(keyBuf)
-			if _, ok := existingTermKeys[string(keyBuf[:keySize])]; ok {
-				updateRows = append(updateRows, row)
-				delete(existingTermKeys, string(keyBuf[:keySize]))
-			} else {
-				addRows = append(addRows, row)
+			if existingTermKeys != nil {
+				if row.KeySize() > len(keyBuf) {
+					keyBuf = make([]byte, row.KeySize())
+				}
+				keySize, _ := row.KeyTo(keyBuf)
+				if _, ok := existingTermKeys[string(keyBuf[:keySize])]; ok {
+					updateRows = append(updateRows, row)
+					delete(existingTermKeys, string(keyBuf[:keySize]))
+					continue
+				}
 			}
+			addRows = append(addRows, row)
 		case *StoredRow:
-			if row.KeySize() > len(keyBuf) {
-				keyBuf = make([]byte, row.KeySize())
-			}
-			keySize, _ := row.KeyTo(keyBuf)
-			if _, ok := existingStoredKeys[string(keyBuf[:keySize])]; ok {
-				updateRows = append(updateRows, row)
-				delete(existingStoredKeys, string(keyBuf[:keySize]))
-			} else {
-				addRows = append(addRows, row)
+			if existingStoredKeys != nil {
+				if row.KeySize() > len(keyBuf) {
+					keyBuf = make([]byte, row.KeySize())
+				}
+				keySize, _ := row.KeyTo(keyBuf)
+				if _, ok := existingStoredKeys[string(keyBuf[:keySize])]; ok {
+					updateRows = append(updateRows, row)
+					delete(existingStoredKeys, string(keyBuf[:keySize]))
+					continue
+				}
 			}
+			addRows = append(addRows, row)
 		default:
 			updateRows = append(updateRows, row)
 		}
@@ -583,33 +604,41 @@ func encodeFieldType(f document.Field) byte {
 		fieldType = 'd'
 	case *document.BooleanField:
 		fieldType = 'b'
+	case *document.GeoPointField:
+		fieldType = 'g'
 	case *document.CompositeField:
 		fieldType = 'c'
 	}
 	return fieldType
 }
 
-func (udc *UpsideDownCouch) indexField(docID []byte, includeTermVectors bool, fieldIndex uint16, fieldLength int, tokenFreqs analysis.TokenFrequencies, rows []index.IndexRow, backIndexTermEntries []*BackIndexTermEntry) ([]index.IndexRow, []*BackIndexTermEntry) {
+func (udc *UpsideDownCouch) indexField(docID []byte, includeTermVectors bool, fieldIndex uint16, fieldLength int, tokenFreqs analysis.TokenFrequencies, rows []index.IndexRow, backIndexTermsEntries []*BackIndexTermsEntry) ([]index.IndexRow, []*BackIndexTermsEntry) {
 	fieldNorm := float32(1.0 / math.Sqrt(float64(fieldLength)))
 
+	termFreqRows := make([]TermFrequencyRow, len(tokenFreqs))
+	termFreqRowsUsed := 0
+
+	terms := make([]string, 0, len(tokenFreqs))
 	for k, tf := range tokenFreqs {
-		var termFreqRow *TermFrequencyRow
+		termFreqRow := &termFreqRows[termFreqRowsUsed]
+		termFreqRowsUsed++
+
+		InitTermFrequencyRow(termFreqRow, tf.Term, fieldIndex, docID,
+			uint64(frequencyFromTokenFreq(tf)), fieldNorm)
+
 		if includeTermVectors {
-			var tv []*TermVector
-			tv, rows = udc.termVectorsFromTokenFreq(fieldIndex, tf, rows)
-			termFreqRow = NewTermFrequencyRowWithTermVectors(tf.Term, fieldIndex, docID, uint64(frequencyFromTokenFreq(tf)), fieldNorm, tv)
-		} else {
-			termFreqRow = NewTermFrequencyRow(tf.Term, fieldIndex, docID, uint64(frequencyFromTokenFreq(tf)), fieldNorm)
+			termFreqRow.vectors, rows = udc.termVectorsFromTokenFreq(fieldIndex, tf, rows)
 		}
 
 		// record the back index entry
-		backIndexTermEntry := BackIndexTermEntry{Term: proto.String(k), Field: proto.Uint32(uint32(fieldIndex))}
-		backIndexTermEntries = append(backIndexTermEntries, &backIndexTermEntry)
+		terms = append(terms, k)
 
 		rows = append(rows, termFreqRow)
 	}
+	backIndexTermsEntry := BackIndexTermsEntry{Field: proto.Uint32(uint32(fieldIndex)), Terms: terms}
+	backIndexTermsEntries = append(backIndexTermsEntries, &backIndexTermsEntry)
 
-	return rows, backIndexTermEntries
+	return rows, backIndexTermsEntries
 }
 
 func (udc *UpsideDownCouch) Delete(id string) (err error) {
@@ -682,9 +711,11 @@ func (udc *UpsideDownCouch) Delete(id string) (err error) {
 func (udc *UpsideDownCouch) deleteSingle(id string, backIndexRow *BackIndexRow, deleteRows []UpsideDownCouchRow) []UpsideDownCouchRow {
 	idBytes := []byte(id)
 
-	for _, backIndexEntry := range backIndexRow.termEntries {
-		tfr := NewTermFrequencyRow([]byte(*backIndexEntry.Term), uint16(*backIndexEntry.Field), idBytes, 0, 0)
-		deleteRows = append(deleteRows, tfr)
+	for _, backIndexEntry := range backIndexRow.termsEntries {
+		for i := range backIndexEntry.Terms {
+			tfr := NewTermFrequencyRow([]byte(backIndexEntry.Terms[i]), uint16(*backIndexEntry.Field), idBytes, 0, 0)
+			deleteRows = append(deleteRows, tfr)
+		}
 	}
 	for _, se := range backIndexRow.storedEntries {
 		sf := NewStoredRow(idBytes, uint16(*se.Field), se.ArrayPositions, 'x', nil)
@@ -706,6 +737,8 @@ func decodeFieldType(typ byte, name string, pos []uint64, value []byte) document
 		return document.NewDateTimeFieldFromBytes(name, pos, value)
 	case 'b':
 		return document.NewBooleanFieldFromBytes(name, pos, value)
+	case 'g':
+		return document.NewGeoPointFieldFromBytes(name, pos, value)
 	}
 	return nil
 }
@@ -715,6 +748,7 @@ func frequencyFromTokenFreq(tf *analysis.TokenFreq) int {
 }
 
 func (udc *UpsideDownCouch) termVectorsFromTokenFreq(field uint16, tf *analysis.TokenFreq, rows []index.IndexRow) ([]*TermVector, []index.IndexRow) {
+	a := make([]TermVector, len(tf.Locations))
 	rv := make([]*TermVector, len(tf.Locations))
 
 	for i, l := range tf.Locations {
@@ -727,14 +761,14 @@ func (udc *UpsideDownCouch) termVectorsFromTokenFreq(field uint16, tf *analysis.
 				rows = append(rows, newFieldRow)
 			}
 		}
-		tv := TermVector{
+		a[i] = TermVector{
 			field:          fieldIndex,
 			arrayPositions: l.ArrayPositions,
 			pos:            uint64(l.Position),
 			start:          uint64(l.Start),
 			end:            uint64(l.End),
 		}
-		rv[i] = &tv
+		rv[i] = &a[i]
 	}
 
 	return rv, rows
@@ -745,18 +779,19 @@ func (udc *UpsideDownCouch) termFieldVectorsFromTermVectors(in []*TermVector) []
 		return nil
 	}
 
+	a := make([]index.TermFieldVector, len(in))
 	rv := make([]*index.TermFieldVector, len(in))
 
 	for i, tv := range in {
 		fieldName := udc.fieldCache.FieldIndexed(tv.field)
-		tfv := index.TermFieldVector{
+		a[i] = index.TermFieldVector{
 			Field:          fieldName,
 			ArrayPositions: tv.arrayPositions,
 			Pos:            tv.pos,
 			Start:          tv.start,
 			End:            tv.end,
 		}
-		rv[i] = &tfv
+		rv[i] = &a[i]
 	}
 	return rv
 }
@@ -1008,7 +1043,7 @@ func init() {
 
 func backIndexRowForDoc(kvreader store.KVReader, docID index.IndexInternalID) (*BackIndexRow, error) {
 	// use a temporary row structure to build key
-	tempRow := &BackIndexRow{
+	tempRow := BackIndexRow{
 		doc: docID,
 	}
 

vendor/github.com/blevesearch/bleve/index/upsidedown/upsidedown.pb.go

@@ -3,15 +3,15 @@
 // DO NOT EDIT!
 
 /*
-Package upsidedown is a generated protocol buffer package.
+	Package upsidedown is a generated protocol buffer package.
 
-It is generated from these files:
-	upsidedown.proto
+	It is generated from these files:
+		upsidedown.proto
 
-It has these top-level messages:
-	BackIndexTermEntry
-	BackIndexStoreEntry
-	BackIndexRowValue
+	It has these top-level messages:
+		BackIndexTermsEntry
+		BackIndexStoreEntry
+		BackIndexRowValue
 */
 package upsidedown
 
@@ -26,30 +26,30 @@ import github_com_golang_protobuf_proto "github.com/golang/protobuf/proto"
 var _ = proto.Marshal
 var _ = math.Inf
 
-type BackIndexTermEntry struct {
-	Term             *string `protobuf:"bytes,1,req,name=term" json:"term,omitempty"`
-	Field            *uint32 `protobuf:"varint,2,req,name=field" json:"field,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+type BackIndexTermsEntry struct {
+	Field            *uint32  `protobuf:"varint,1,req,name=field" json:"field,omitempty"`
+	Terms            []string `protobuf:"bytes,2,rep,name=terms" json:"terms,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
 }
 
-func (m *BackIndexTermEntry) Reset()         { *m = BackIndexTermEntry{} }
-func (m *BackIndexTermEntry) String() string { return proto.CompactTextString(m) }
-func (*BackIndexTermEntry) ProtoMessage()    {}
+func (m *BackIndexTermsEntry) Reset()         { *m = BackIndexTermsEntry{} }
+func (m *BackIndexTermsEntry) String() string { return proto.CompactTextString(m) }
+func (*BackIndexTermsEntry) ProtoMessage()    {}
 
-func (m *BackIndexTermEntry) GetTerm() string {
-	if m != nil && m.Term != nil {
-		return *m.Term
-	}
-	return ""
-}
-
-func (m *BackIndexTermEntry) GetField() uint32 {
+func (m *BackIndexTermsEntry) GetField() uint32 {
 	if m != nil && m.Field != nil {
 		return *m.Field
 	}
 	return 0
 }
 
+func (m *BackIndexTermsEntry) GetTerms() []string {
+	if m != nil {
+		return m.Terms
+	}
+	return nil
+}
+
 type BackIndexStoreEntry struct {
 	Field            *uint32  `protobuf:"varint,1,req,name=field" json:"field,omitempty"`
 	ArrayPositions   []uint64 `protobuf:"varint,2,rep,name=arrayPositions" json:"arrayPositions,omitempty"`
@@ -75,7 +75,7 @@ func (m *BackIndexStoreEntry) GetArrayPositions() []uint64 {
 }
 
 type BackIndexRowValue struct {
-	TermEntries      []*BackIndexTermEntry  `protobuf:"bytes,1,rep,name=termEntries" json:"termEntries,omitempty"`
+	TermsEntries     []*BackIndexTermsEntry `protobuf:"bytes,1,rep,name=termsEntries" json:"termsEntries,omitempty"`
 	StoredEntries    []*BackIndexStoreEntry `protobuf:"bytes,2,rep,name=storedEntries" json:"storedEntries,omitempty"`
 	XXX_unrecognized []byte                 `json:"-"`
 }
@@ -84,9 +84,9 @@ func (m *BackIndexRowValue) Reset()         { *m = BackIndexRowValue{} }
 func (m *BackIndexRowValue) String() string { return proto.CompactTextString(m) }
 func (*BackIndexRowValue) ProtoMessage()    {}
 
-func (m *BackIndexRowValue) GetTermEntries() []*BackIndexTermEntry {
+func (m *BackIndexRowValue) GetTermsEntries() []*BackIndexTermsEntry {
 	if m != nil {
-		return m.TermEntries
+		return m.TermsEntries
 	}
 	return nil
 }
@@ -98,7 +98,7 @@ func (m *BackIndexRowValue) GetStoredEntries() []*BackIndexStoreEntry {
 	return nil
 }
 
-func (m *BackIndexTermEntry) Unmarshal(data []byte) error {
+func (m *BackIndexTermsEntry) Unmarshal(data []byte) error {
 	var hasFields [1]uint64
 	l := len(data)
 	iNdEx := 0
@@ -119,47 +119,45 @@ func (m *BackIndexTermEntry) Unmarshal(data []byte) error {
 		wireType := int(wire & 0x7)
 		switch fieldNum {
 		case 1:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Term", wireType)
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Field", wireType)
 			}
-			var stringLen uint64
+			var v uint32
 			for shift := uint(0); ; shift += 7 {
 				if iNdEx >= l {
 					return io.ErrUnexpectedEOF
 				}
 				b := data[iNdEx]
 				iNdEx++
-				stringLen |= (uint64(b) & 0x7F) << shift
+				v |= (uint32(b) & 0x7F) << shift
 				if b < 0x80 {
 					break
 				}
 			}
-			postIndex := iNdEx + int(stringLen)
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			s := string(data[iNdEx:postIndex])
-			m.Term = &s
-			iNdEx = postIndex
+			m.Field = &v
 			hasFields[0] |= uint64(0x00000001)
 		case 2:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Field", wireType)
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Terms", wireType)
 			}
-			var v uint32
+			var stringLen uint64
 			for shift := uint(0); ; shift += 7 {
 				if iNdEx >= l {
 					return io.ErrUnexpectedEOF
 				}
 				b := data[iNdEx]
 				iNdEx++
-				v |= (uint32(b) & 0x7F) << shift
+				stringLen |= (uint64(b) & 0x7F) << shift
 				if b < 0x80 {
 					break
 				}
 			}
-			m.Field = &v
-			hasFields[0] |= uint64(0x00000002)
+			postIndex := iNdEx + int(stringLen)
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Terms = append(m.Terms, string(data[iNdEx:postIndex]))
+			iNdEx = postIndex
 		default:
 			var sizeOfWire int
 			for {
@@ -187,9 +185,6 @@ func (m *BackIndexTermEntry) Unmarshal(data []byte) error {
 	if hasFields[0]&uint64(0x00000001) == 0 {
 		return new(github_com_golang_protobuf_proto.RequiredNotSetError)
 	}
-	if hasFields[0]&uint64(0x00000002) == 0 {
-		return new(github_com_golang_protobuf_proto.RequiredNotSetError)
-	}
 
 	return nil
 }
@@ -299,7 +294,7 @@ func (m *BackIndexRowValue) Unmarshal(data []byte) error {
 		switch fieldNum {
 		case 1:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field TermEntries", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field TermsEntries", wireType)
 			}
 			var msglen int
 			for shift := uint(0); ; shift += 7 {
@@ -320,8 +315,8 @@ func (m *BackIndexRowValue) Unmarshal(data []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.TermEntries = append(m.TermEntries, &BackIndexTermEntry{})
-			if err := m.TermEntries[len(m.TermEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
+			m.TermsEntries = append(m.TermsEntries, &BackIndexTermsEntry{})
+			if err := m.TermsEntries[len(m.TermsEntries)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -472,16 +467,18 @@ var (
 	ErrInvalidLengthUpsidedown = fmt.Errorf("proto: negative length found during unmarshaling")
 )
 
-func (m *BackIndexTermEntry) Size() (n int) {
+func (m *BackIndexTermsEntry) Size() (n int) {
 	var l int
 	_ = l
-	if m.Term != nil {
-		l = len(*m.Term)
-		n += 1 + l + sovUpsidedown(uint64(l))
-	}
 	if m.Field != nil {
 		n += 1 + sovUpsidedown(uint64(*m.Field))
 	}
+	if len(m.Terms) > 0 {
+		for _, s := range m.Terms {
+			l = len(s)
+			n += 1 + l + sovUpsidedown(uint64(l))
+		}
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -508,8 +505,8 @@ func (m *BackIndexStoreEntry) Size() (n int) {
 func (m *BackIndexRowValue) Size() (n int) {
 	var l int
 	_ = l
-	if len(m.TermEntries) > 0 {
-		for _, e := range m.TermEntries {
+	if len(m.TermsEntries) > 0 {
+		for _, e := range m.TermsEntries {
 			l = e.Size()
 			n += 1 + l + sovUpsidedown(uint64(l))
 		}
@@ -539,7 +536,7 @@ func sovUpsidedown(x uint64) (n int) {
 func sozUpsidedown(x uint64) (n int) {
 	return sovUpsidedown(uint64((x << 1) ^ uint64((int64(x) >> 63))))
 }
-func (m *BackIndexTermEntry) Marshal() (data []byte, err error) {
+func (m *BackIndexTermsEntry) Marshal() (data []byte, err error) {
 	size := m.Size()
 	data = make([]byte, size)
 	n, err := m.MarshalTo(data)
@@ -549,26 +546,33 @@ func (m *BackIndexTermEntry) Marshal() (data []byte, err error) {
 	return data[:n], nil
 }
 
-func (m *BackIndexTermEntry) MarshalTo(data []byte) (n int, err error) {
+func (m *BackIndexTermsEntry) MarshalTo(data []byte) (n int, err error) {
 	var i int
 	_ = i
 	var l int
 	_ = l
-	if m.Term == nil {
-		return 0, new(github_com_golang_protobuf_proto.RequiredNotSetError)
-	} else {
-		data[i] = 0xa
-		i++
-		i = encodeVarintUpsidedown(data, i, uint64(len(*m.Term)))
-		i += copy(data[i:], *m.Term)
-	}
 	if m.Field == nil {
 		return 0, new(github_com_golang_protobuf_proto.RequiredNotSetError)
 	} else {
-		data[i] = 0x10
+		data[i] = 0x8
 		i++
 		i = encodeVarintUpsidedown(data, i, uint64(*m.Field))
 	}
+	if len(m.Terms) > 0 {
+		for _, s := range m.Terms {
+			data[i] = 0x12
+			i++
+			l = len(s)
+			for l >= 1<<7 {
+				data[i] = uint8(uint64(l)&0x7f | 0x80)
+				l >>= 7
+				i++
+			}
+			data[i] = uint8(l)
+			i++
+			i += copy(data[i:], s)
+		}
+	}
 	if m.XXX_unrecognized != nil {
 		i += copy(data[i:], m.XXX_unrecognized)
 	}
@@ -625,8 +629,8 @@ func (m *BackIndexRowValue) MarshalTo(data []byte) (n int, err error) {
 	_ = i
 	var l int
 	_ = l
-	if len(m.TermEntries) > 0 {
-		for _, msg := range m.TermEntries {
+	if len(m.TermsEntries) > 0 {
+		for _, msg := range m.TermsEntries {
 			data[i] = 0xa
 			i++
 			i = encodeVarintUpsidedown(data, i, uint64(msg.Size()))

vendor/github.com/blevesearch/bleve/index/upsidedown/upsidedown.proto

@@ -1,6 +1,6 @@
-message BackIndexTermEntry {
-	required string term = 1;
-	required uint32 field = 2;
+message BackIndexTermsEntry {
+  required uint32 field = 1;
+	repeated string terms = 2;
 }
 
 message BackIndexStoreEntry {
@@ -9,6 +9,6 @@ message BackIndexStoreEntry {
 }
 
 message BackIndexRowValue {
-	repeated BackIndexTermEntry termEntries = 1;
+	repeated BackIndexTermsEntry termsEntries = 1;
 	repeated BackIndexStoreEntry storedEntries = 2;
 }

vendor/github.com/blevesearch/bleve/index_alias_impl.go

@@ -425,14 +425,15 @@ func (i *indexAliasImpl) Swap(in, out []Index) {
 // could be slower in remote usages.
 func createChildSearchRequest(req *SearchRequest) *SearchRequest {
 	rv := SearchRequest{
-		Query:     req.Query,
-		Size:      req.Size + req.From,
-		From:      0,
-		Highlight: req.Highlight,
-		Fields:    req.Fields,
-		Facets:    req.Facets,
-		Explain:   req.Explain,
-		Sort:      req.Sort,
+		Query:            req.Query,
+		Size:             req.Size + req.From,
+		From:             0,
+		Highlight:        req.Highlight,
+		Fields:           req.Fields,
+		Facets:           req.Facets,
+		Explain:          req.Explain,
+		Sort:             req.Sort.Copy(),
+		IncludeLocations: req.IncludeLocations,
 	}
 	return &rv
 }

vendor/github.com/blevesearch/bleve/index_impl.go

@@ -253,6 +253,24 @@ func (i *indexImpl) Index(id string, data interface{}) (err error) {
 	return
 }
 
+// IndexAdvanced takes a document.Document object
+// skips the mapping and indexes it.
+func (i *indexImpl) IndexAdvanced(doc *document.Document) (err error) {
+	if doc.ID == "" {
+		return ErrorEmptyID
+	}
+
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+
+	if !i.open {
+		return ErrorIndexClosed
+	}
+
+	err = i.i.Update(doc)
+	return
+}
+
 // Delete entries for the specified identifier from
 // the index.
 func (i *indexImpl) Delete(id string) (err error) {
@@ -370,7 +388,10 @@ func (i *indexImpl) SearchInContext(ctx context.Context, req *SearchRequest) (sr
 		}
 	}()
 
-	searcher, err := req.Query.Searcher(indexReader, i.m, req.Explain)
+	searcher, err := req.Query.Searcher(indexReader, i.m, search.SearcherOptions{
+		Explain:            req.Explain,
+		IncludeTermVectors: req.IncludeLocations || req.Highlight != nil,
+	})
 	if err != nil {
 		return nil, err
 	}
@@ -461,6 +482,14 @@ func (i *indexImpl) SearchInContext(ctx context.Context, req *SearchRequest) (sr
 									if err == nil {
 										value = boolean
 									}
+								case *document.GeoPointField:
+									lon, err := docF.Lon()
+									if err == nil {
+										lat, err := docF.Lat()
+										if err == nil {
+											value = []float64{lon, lat}
+										}
+									}
 								}
 								if value != nil {
 									hit.AddFieldValue(docF.Name(), value)

vendor/github.com/blevesearch/bleve/mapping.go

@@ -59,3 +59,7 @@ func NewDateTimeFieldMapping() *mapping.FieldMapping {
 func NewBooleanFieldMapping() *mapping.FieldMapping {
 	return mapping.NewBooleanFieldMapping()
 }
+
+func NewGeoPointFieldMapping() *mapping.FieldMapping {
+	return mapping.NewGeoPointFieldMapping()
+}

vendor/github.com/blevesearch/bleve/mapping/document.go

@@ -15,6 +15,7 @@
 package mapping
 
 import (
+	"encoding"
 	"encoding/json"
 	"fmt"
 	"reflect"
@@ -75,7 +76,7 @@ func (dm *DocumentMapping) Validate(cache *registry.Cache) error {
 			}
 		}
 		switch field.Type {
-		case "text", "datetime", "number", "boolean":
+		case "text", "datetime", "number", "boolean", "geopoint":
 		default:
 			return fmt.Errorf("unknown field type: '%s'", field.Type)
 		}
@@ -481,9 +482,57 @@ func (dm *DocumentMapping) processProperty(property interface{}, path []string,
 				fieldMapping := newDateTimeFieldMappingDynamic(context.im)
 				fieldMapping.processTime(property, pathString, path, indexes, context)
 			}
+		case encoding.TextMarshaler:
+			txt, err := property.MarshalText()
+			if err == nil && subDocMapping != nil {
+				// index by explicit mapping
+				for _, fieldMapping := range subDocMapping.Fields {
+					if fieldMapping.Type == "text" {
+						fieldMapping.processString(string(txt), pathString, path, indexes, context)
+					}
+				}
+			}
+			dm.walkDocument(property, path, indexes, context)
 		default:
+			if subDocMapping != nil {
+				for _, fieldMapping := range subDocMapping.Fields {
+					if fieldMapping.Type == "geopoint" {
+						fieldMapping.processGeoPoint(property, pathString, path, indexes, context)
+					}
+				}
+			}
 			dm.walkDocument(property, path, indexes, context)
 		}
+	case reflect.Map:
+		if subDocMapping != nil {
+			for _, fieldMapping := range subDocMapping.Fields {
+				if fieldMapping.Type == "geopoint" {
+					fieldMapping.processGeoPoint(property, pathString, path, indexes, context)
+				}
+			}
+		}
+		dm.walkDocument(property, path, indexes, context)
+	case reflect.Ptr:
+		if !propertyValue.IsNil() {
+			switch property := property.(type) {
+			case encoding.TextMarshaler:
+
+				txt, err := property.MarshalText()
+				if err == nil && subDocMapping != nil {
+					// index by explicit mapping
+					for _, fieldMapping := range subDocMapping.Fields {
+						if fieldMapping.Type == "text" {
+							fieldMapping.processString(string(txt), pathString, path, indexes, context)
+						}
+					}
+				} else {
+					dm.walkDocument(property, path, indexes, context)
+				}
+
+			default:
+				dm.walkDocument(property, path, indexes, context)
+			}
+		}
 	default:
 		dm.walkDocument(property, path, indexes, context)
 	}

vendor/github.com/blevesearch/bleve/mapping/field.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/blevesearch/bleve/analysis"
 	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/geo"
 )
 
 // control the default behavior for dynamic fields (those not explicitly mapped)
@@ -124,6 +125,16 @@ func newBooleanFieldMappingDynamic(im *IndexMappingImpl) *FieldMapping {
 	return rv
 }
 
+// NewGeoPointFieldMapping returns a default field mapping for geo points
+func NewGeoPointFieldMapping() *FieldMapping {
+	return &FieldMapping{
+		Type:         "geopoint",
+		Store:        true,
+		Index:        true,
+		IncludeInAll: true,
+	}
+}
+
 // Options returns the indexing options for this field.
 func (fm *FieldMapping) Options() document.IndexingOptions {
 	var rv document.IndexingOptions
@@ -208,6 +219,20 @@ func (fm *FieldMapping) processBoolean(propertyValueBool bool, pathString string
 	}
 }
 
+func (fm *FieldMapping) processGeoPoint(propertyMightBeGeoPoint interface{}, pathString string, path []string, indexes []uint64, context *walkContext) {
+	lon, lat, found := geo.ExtractGeoPoint(propertyMightBeGeoPoint)
+	if found {
+		fieldName := getFieldName(pathString, path, fm)
+		options := fm.Options()
+		field := document.NewGeoPointFieldWithIndexingOptions(fieldName, indexes, lon, lat, options)
+		context.doc.AddField(field)
+
+		if !fm.IncludeInAll {
+			context.excludedFromAll = append(context.excludedFromAll, fieldName)
+		}
+	}
+}
+
 func (fm *FieldMapping) analyzerForField(path []string, context *walkContext) *analysis.Analyzer {
 	analyzerName := fm.Analyzer
 	if analyzerName == "" {

vendor/github.com/blevesearch/bleve/mapping/index.go

@@ -289,7 +289,12 @@ func (im *IndexMappingImpl) UnmarshalJSON(data []byte) error {
 }
 
 func (im *IndexMappingImpl) determineType(data interface{}) string {
-	// first see if the object implements Classifier
+	// first see if the object implements bleveClassifier
+	bleveClassifier, ok := data.(bleveClassifier)
+	if ok {
+		return bleveClassifier.BleveType()
+	}
+	// next see if the object implements Classifier
 	classifier, ok := data.(Classifier)
 	if ok {
 		return classifier.Type()

vendor/github.com/blevesearch/bleve/mapping/mapping.go

@@ -22,12 +22,21 @@ import (
 	"github.com/blevesearch/bleve/document"
 )
 
-// A Classifier is an interface describing any object
-// which knows how to identify its own type.
+// A Classifier is an interface describing any object which knows how to
+// identify its own type.  Alternatively, if a struct already has a Type
+// field or method in conflict, one can use BleveType instead.
 type Classifier interface {
 	Type() string
 }
 
+// A bleveClassifier is an interface describing any object which knows how
+// to identify its own type.  This is introduced as an alternative to the
+// Classifier interface which often has naming conflicts with existing
+// structures.
+type bleveClassifier interface {
+	BleveType() string
+}
+
 var logger = log.New(ioutil.Discard, "bleve mapping ", log.LstdFlags)
 
 // SetLog sets the logger used for logging

vendor/github.com/blevesearch/bleve/numeric/bin.go

@@ -0,0 +1,43 @@
+package numeric
+
+var interleaveMagic = []uint64{
+	0x5555555555555555,
+	0x3333333333333333,
+	0x0F0F0F0F0F0F0F0F,
+	0x00FF00FF00FF00FF,
+	0x0000FFFF0000FFFF,
+	0x00000000FFFFFFFF,
+	0xAAAAAAAAAAAAAAAA,
+}
+
+var interleaveShift = []uint{1, 2, 4, 8, 16}
+
+// Interleave the first 32 bits of each uint64
+// apdated from org.apache.lucene.util.BitUtil
+// whcih was adapted from:
+// http://graphics.stanford.edu/~seander/bithacks.html#InterleaveBMN
+func Interleave(v1, v2 uint64) uint64 {
+	v1 = (v1 | (v1 << interleaveShift[4])) & interleaveMagic[4]
+	v1 = (v1 | (v1 << interleaveShift[3])) & interleaveMagic[3]
+	v1 = (v1 | (v1 << interleaveShift[2])) & interleaveMagic[2]
+	v1 = (v1 | (v1 << interleaveShift[1])) & interleaveMagic[1]
+	v1 = (v1 | (v1 << interleaveShift[0])) & interleaveMagic[0]
+	v2 = (v2 | (v2 << interleaveShift[4])) & interleaveMagic[4]
+	v2 = (v2 | (v2 << interleaveShift[3])) & interleaveMagic[3]
+	v2 = (v2 | (v2 << interleaveShift[2])) & interleaveMagic[2]
+	v2 = (v2 | (v2 << interleaveShift[1])) & interleaveMagic[1]
+	v2 = (v2 | (v2 << interleaveShift[0])) & interleaveMagic[0]
+	return (v2 << 1) | v1
+}
+
+// Deinterleave the 32-bit value starting at position 0
+// to get the other 32-bit value, shift it by 1 first
+func Deinterleave(b uint64) uint64 {
+	b &= interleaveMagic[0]
+	b = (b ^ (b >> interleaveShift[0])) & interleaveMagic[1]
+	b = (b ^ (b >> interleaveShift[1])) & interleaveMagic[2]
+	b = (b ^ (b >> interleaveShift[2])) & interleaveMagic[3]
+	b = (b ^ (b >> interleaveShift[3])) & interleaveMagic[4]
+	b = (b ^ (b >> interleaveShift[4])) & interleaveMagic[5]
+	return b
+}

vendor/github.com/blevesearch/bleve/query.go

@@ -139,6 +139,23 @@ func NewNumericRangeInclusiveQuery(min, max *float64, minInclusive, maxInclusive
 	return query.NewNumericRangeInclusiveQuery(min, max, minInclusive, maxInclusive)
 }
 
+// NewTermRangeQuery creates a new Query for ranges
+// of text terms.
+// Either, but not both endpoints can be "".
+// The minimum value is inclusive.
+// The maximum value is exclusive.
+func NewTermRangeQuery(min, max string) *query.TermRangeQuery {
+	return query.NewTermRangeQuery(min, max)
+}
+
+// NewTermRangeInclusiveQuery creates a new Query for ranges
+// of text terms.
+// Either, but not both endpoints can be "".
+// Control endpoint inclusion with inclusiveMin, inclusiveMax.
+func NewTermRangeInclusiveQuery(min, max string, minInclusive, maxInclusive *bool) *query.TermRangeQuery {
+	return query.NewTermRangeInclusiveQuery(min, max, minInclusive, maxInclusive)
+}
+
 // NewPhraseQuery creates a new Query for finding
 // exact term phrases in the index.
 // The provided terms must exist in the correct
@@ -184,3 +201,18 @@ func NewTermQuery(term string) *query.TermQuery {
 func NewWildcardQuery(wildcard string) *query.WildcardQuery {
 	return query.NewWildcardQuery(wildcard)
 }
+
+// NewGeoBoundingBoxQuery creates a new Query for performing geo bounding
+// box searches. The arguments describe the position of the box and documents
+// which have an indexed geo point inside the box will be returned.
+func NewGeoBoundingBoxQuery(topLeftLon, topLeftLat, bottomRightLon, bottomRightLat float64) *query.GeoBoundingBoxQuery {
+	return query.NewGeoBoundingBoxQuery(topLeftLon, topLeftLat, bottomRightLon, bottomRightLat)
+}
+
+// NewGeoDistanceQuery creates a new Query for performing geo bounding
+// box searches. The arguments describe a position and a distance. Documents
+// which have an indexed geo point which is less than or equal to the provided
+// distance from the given position will be returned.
+func NewGeoDistanceQuery(lon, lat float64, distance string) *query.GeoDistanceQuery {
+	return query.NewGeoDistanceQuery(lon, lat, distance)
+}

vendor/github.com/blevesearch/bleve/search.go

@@ -20,10 +20,16 @@ import (
 	"time"
 
 	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/datetime/optional"
+	"github.com/blevesearch/bleve/registry"
 	"github.com/blevesearch/bleve/search"
 	"github.com/blevesearch/bleve/search/query"
 )
 
+var cache = registry.NewCache()
+
+const defaultDateTimeParser = optional.Name
+
 type numericRange struct {
 	Name string   `json:"name,omitempty"`
 	Min  *float64 `json:"min,omitempty"`
@@ -105,26 +111,41 @@ type FacetRequest struct {
 }
 
 func (fr *FacetRequest) Validate() error {
-	if len(fr.NumericRanges) > 0 && len(fr.DateTimeRanges) > 0 {
+	nrCount := len(fr.NumericRanges)
+	drCount := len(fr.DateTimeRanges)
+	if nrCount > 0 && drCount > 0 {
 		return fmt.Errorf("facet can only conain numeric ranges or date ranges, not both")
 	}
 
-	nrNames := map[string]interface{}{}
-	for _, nr := range fr.NumericRanges {
-		if _, ok := nrNames[nr.Name]; ok {
-			return fmt.Errorf("numeric ranges contains duplicate name '%s'", nr.Name)
+	if nrCount > 0 {
+		nrNames := map[string]interface{}{}
+		for _, nr := range fr.NumericRanges {
+			if _, ok := nrNames[nr.Name]; ok {
+				return fmt.Errorf("numeric ranges contains duplicate name '%s'", nr.Name)
+			}
+			nrNames[nr.Name] = struct{}{}
+			if nr.Min == nil && nr.Max == nil {
+				return fmt.Errorf("numeric range query must specify either min, max or both for range name '%s'", nr.Name)
+			}
 		}
-		nrNames[nr.Name] = struct{}{}
-	}
 
-	drNames := map[string]interface{}{}
-	for _, dr := range fr.DateTimeRanges {
-		if _, ok := drNames[dr.Name]; ok {
-			return fmt.Errorf("date ranges contains duplicate name '%s'", dr.Name)
+	} else {
+		dateTimeParser, err := cache.DateTimeParserNamed(defaultDateTimeParser)
+		if err != nil {
+			return err
+		}
+		drNames := map[string]interface{}{}
+		for _, dr := range fr.DateTimeRanges {
+			if _, ok := drNames[dr.Name]; ok {
+				return fmt.Errorf("date ranges contains duplicate name '%s'", dr.Name)
+			}
+			drNames[dr.Name] = struct{}{}
+			start, end := dr.ParseDates(dateTimeParser)
+			if start.IsZero() && end.IsZero() {
+				return fmt.Errorf("date range query must specify either start, end or both for range name '%s'", dr.Name)
+			}
 		}
-		drNames[dr.Name] = struct{}{}
 	}
-
 	return nil
 }
 
@@ -149,6 +170,16 @@ func (fr *FacetRequest) AddDateTimeRange(name string, start, end time.Time) {
 	fr.DateTimeRanges = append(fr.DateTimeRanges, &dateTimeRange{Name: name, Start: start, End: end})
 }
 
+// AddDateTimeRangeString adds a bucket to a field
+// containing date values.
+func (fr *FacetRequest) AddDateTimeRangeString(name string, start, end *string) {
+	if fr.DateTimeRanges == nil {
+		fr.DateTimeRanges = make([]*dateTimeRange, 0, 1)
+	}
+	fr.DateTimeRanges = append(fr.DateTimeRanges,
+		&dateTimeRange{Name: name, startString: start, endString: end})
+}
+
 // AddNumericRange adds a bucket to a field
 // containing numeric values.  Documents with a
 // numeric value falling into this range are
@@ -219,14 +250,15 @@ func (h *HighlightRequest) AddField(field string) {
 //
 // A special field named "*" can be used to return all fields.
 type SearchRequest struct {
-	Query     query.Query       `json:"query"`
-	Size      int               `json:"size"`
-	From      int               `json:"from"`
-	Highlight *HighlightRequest `json:"highlight"`
-	Fields    []string          `json:"fields"`
-	Facets    FacetsRequest     `json:"facets"`
-	Explain   bool              `json:"explain"`
-	Sort      search.SortOrder  `json:"sort"`
+	Query            query.Query       `json:"query"`
+	Size             int               `json:"size"`
+	From             int               `json:"from"`
+	Highlight        *HighlightRequest `json:"highlight"`
+	Fields           []string          `json:"fields"`
+	Facets           FacetsRequest     `json:"facets"`
+	Explain          bool              `json:"explain"`
+	Sort             search.SortOrder  `json:"sort"`
+	IncludeLocations bool              `json:"includeLocations"`
 }
 
 func (r *SearchRequest) Validate() error {
@@ -267,14 +299,15 @@ func (r *SearchRequest) SortByCustom(order search.SortOrder) {
 // a SearchRequest
 func (r *SearchRequest) UnmarshalJSON(input []byte) error {
 	var temp struct {
-		Q         json.RawMessage   `json:"query"`
-		Size      *int              `json:"size"`
-		From      int               `json:"from"`
-		Highlight *HighlightRequest `json:"highlight"`
-		Fields    []string          `json:"fields"`
-		Facets    FacetsRequest     `json:"facets"`
-		Explain   bool              `json:"explain"`
-		Sort      []json.RawMessage `json:"sort"`
+		Q                json.RawMessage   `json:"query"`
+		Size             *int              `json:"size"`
+		From             int               `json:"from"`
+		Highlight        *HighlightRequest `json:"highlight"`
+		Fields           []string          `json:"fields"`
+		Facets           FacetsRequest     `json:"facets"`
+		Explain          bool              `json:"explain"`
+		Sort             []json.RawMessage `json:"sort"`
+		IncludeLocations bool              `json:"includeLocations"`
 	}
 
 	err := json.Unmarshal(input, &temp)
@@ -300,6 +333,7 @@ func (r *SearchRequest) UnmarshalJSON(input []byte) error {
 	r.Highlight = temp.Highlight
 	r.Fields = temp.Fields
 	r.Facets = temp.Facets
+	r.IncludeLocations = temp.IncludeLocations
 	r.Query, err = query.ParseQuery(temp.Q)
 	if err != nil {
 		return err

vendor/github.com/blevesearch/bleve/search/collector/heap.go

@@ -34,11 +34,20 @@ func newStoreHeap(cap int, compare collectorCompare) *collectStoreHeap {
 	return rv
 }
 
-func (c *collectStoreHeap) Add(doc *search.DocumentMatch) {
+func (c *collectStoreHeap) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.Len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreHeap) add(doc *search.DocumentMatch) {
 	heap.Push(c, doc)
 }
 
-func (c *collectStoreHeap) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreHeap) removeLast() *search.DocumentMatch {
 	return heap.Pop(c).(*search.DocumentMatch)
 }
 
@@ -49,17 +58,12 @@ func (c *collectStoreHeap) Final(skip int, fixup collectorFixup) (search.Documen
 		return make(search.DocumentMatchCollection, 0), nil
 	}
 	rv := make(search.DocumentMatchCollection, size)
-	for count > 0 {
-		count--
-
-		if count >= skip {
-			size--
-			doc := heap.Pop(c).(*search.DocumentMatch)
-			rv[size] = doc
-			err := fixup(doc)
-			if err != nil {
-				return nil, err
-			}
+	for i := size - 1; i >= 0; i-- {
+		doc := heap.Pop(c).(*search.DocumentMatch)
+		rv[i] = doc
+		err := fixup(doc)
+		if err != nil {
+			return nil, err
 		}
 	}
 	return rv, nil

vendor/github.com/blevesearch/bleve/search/collector/list.go

@@ -34,7 +34,16 @@ func newStoreList(cap int, compare collectorCompare) *collectStoreList {
 	return rv
 }
 
-func (c *collectStoreList) Add(doc *search.DocumentMatch) {
+func (c *collectStoreList) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreList) add(doc *search.DocumentMatch) {
 	for e := c.results.Front(); e != nil; e = e.Next() {
 		curr := e.Value.(*search.DocumentMatch)
 		if c.compare(doc, curr) >= 0 {
@@ -46,7 +55,7 @@ func (c *collectStoreList) Add(doc *search.DocumentMatch) {
 	c.results.PushBack(doc)
 }
 
-func (c *collectStoreList) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreList) removeLast() *search.DocumentMatch {
 	return c.results.Remove(c.results.Front()).(*search.DocumentMatch)
 }
 
@@ -73,6 +82,6 @@ func (c *collectStoreList) Final(skip int, fixup collectorFixup) (search.Documen
 	return search.DocumentMatchCollection{}, nil
 }
 
-func (c *collectStoreList) Len() int {
+func (c *collectStoreList) len() int {
 	return c.results.Len()
 }

vendor/github.com/blevesearch/bleve/search/collector/slice.go

@@ -29,7 +29,16 @@ func newStoreSlice(cap int, compare collectorCompare) *collectStoreSlice {
 	return rv
 }
 
-func (c *collectStoreSlice) Add(doc *search.DocumentMatch) {
+func (c *collectStoreSlice) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreSlice) add(doc *search.DocumentMatch) {
 	// find where to insert, starting at end (lowest)
 	i := len(c.slice)
 	for ; i > 0; i-- {
@@ -44,7 +53,7 @@ func (c *collectStoreSlice) Add(doc *search.DocumentMatch) {
 	c.slice[i] = doc
 }
 
-func (c *collectStoreSlice) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreSlice) removeLast() *search.DocumentMatch {
 	var rv *search.DocumentMatch
 	rv, c.slice = c.slice[len(c.slice)-1], c.slice[:len(c.slice)-1]
 	return rv
@@ -63,6 +72,6 @@ func (c *collectStoreSlice) Final(skip int, fixup collectorFixup) (search.Docume
 	return search.DocumentMatchCollection{}, nil
 }
 
-func (c *collectStoreSlice) Len() int {
+func (c *collectStoreSlice) len() int {
 	return len(c.slice)
 }

vendor/github.com/blevesearch/bleve/search/collector/topn.go

@@ -22,6 +22,15 @@ import (
 	"golang.org/x/net/context"
 )
 
+type collectorStore interface {
+	// Add the document, and if the new store size exceeds the provided size
+	// the last element is removed and returned.  If the size has not been
+	// exceeded, nil is returned.
+	AddNotExceedingSize(doc *search.DocumentMatch, size int) *search.DocumentMatch
+
+	Final(skip int, fixup collectorFixup) (search.DocumentMatchCollection, error)
+}
+
 // PreAllocSizeSkipCap will cap preallocation to this amount when
 // size+skip exceeds this value
 var PreAllocSizeSkipCap = 1000
@@ -41,7 +50,7 @@ type TopNCollector struct {
 	results       search.DocumentMatchCollection
 	facetsBuilder *search.FacetsBuilder
 
-	store *collectStoreSlice
+	store collectorStore
 
 	needDocIds    bool
 	neededFields  []string
@@ -68,9 +77,15 @@ func NewTopNCollector(size int, skip int, sort search.SortOrder) *TopNCollector
 		backingSize = PreAllocSizeSkipCap + 1
 	}
 
-	hc.store = newStoreSlice(backingSize, func(i, j *search.DocumentMatch) int {
-		return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
-	})
+	if size+skip > 10 {
+		hc.store = newStoreHeap(backingSize, func(i, j *search.DocumentMatch) int {
+			return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
+		})
+	} else {
+		hc.store = newStoreSlice(backingSize, func(i, j *search.DocumentMatch) int {
+			return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
+		})
+	}
 
 	// these lookups traverse an interface, so do once up-front
 	if sort.RequiresDocID() {
@@ -114,12 +129,6 @@ func (hc *TopNCollector) Collect(ctx context.Context, searcher search.Searcher,
 			default:
 			}
 		}
-		if hc.facetsBuilder != nil {
-			err = hc.facetsBuilder.Update(next)
-			if err != nil {
-				break
-			}
-		}
 
 		err = hc.collectSingle(searchContext, reader, next)
 		if err != nil {
@@ -144,6 +153,16 @@ func (hc *TopNCollector) Collect(ctx context.Context, searcher search.Searcher,
 var sortByScoreOpt = []string{"_score"}
 
 func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.IndexReader, d *search.DocumentMatch) error {
+	var err error
+
+	// visit field terms for features that require it (sort, facets)
+	if len(hc.neededFields) > 0 {
+		err = hc.visitFieldTerms(reader, d)
+		if err != nil {
+			return err
+		}
+	}
+
 	// increment total hits
 	hc.total++
 	d.HitNumber = hc.total
@@ -153,7 +172,6 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		hc.maxScore = d.Score
 	}
 
-	var err error
 	// see if we need to load ID (at this early stage, for example to sort on it)
 	if hc.needDocIds {
 		d.ID, err = reader.ExternalID(d.IndexInternalID)
@@ -162,22 +180,6 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		}
 	}
 
-	// see if we need to load the stored fields
-	if len(hc.neededFields) > 0 {
-		// find out which fields haven't been loaded yet
-		fieldsToLoad := d.CachedFieldTerms.FieldsNotYetCached(hc.neededFields)
-		// look them up
-		fieldTerms, err := reader.DocumentFieldTerms(d.IndexInternalID, fieldsToLoad)
-		if err != nil {
-			return err
-		}
-		// cache these as well
-		if d.CachedFieldTerms == nil {
-			d.CachedFieldTerms = make(map[string][]string)
-		}
-		d.CachedFieldTerms.Merge(fieldTerms)
-	}
-
 	// compute this hits sort value
 	if len(hc.sort) == 1 && hc.cachedScoring[0] {
 		d.Sort = sortByScoreOpt
@@ -197,9 +199,8 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		}
 	}
 
-	hc.store.Add(d)
-	if hc.store.Len() > hc.size+hc.skip {
-		removed := hc.store.RemoveLast()
+	removed := hc.store.AddNotExceedingSize(d, hc.size+hc.skip)
+	if removed != nil {
 		if hc.lowestMatchOutsideResults == nil {
 			hc.lowestMatchOutsideResults = removed
 		} else {
@@ -215,9 +216,31 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 	return nil
 }
 
+// visitFieldTerms is responsible for visiting the field terms of the
+// search hit, and passing visited terms to the sort and facet builder
+func (hc *TopNCollector) visitFieldTerms(reader index.IndexReader, d *search.DocumentMatch) error {
+	if hc.facetsBuilder != nil {
+		hc.facetsBuilder.StartDoc()
+	}
+
+	err := reader.DocumentVisitFieldTerms(d.IndexInternalID, hc.neededFields, func(field string, term []byte) {
+		if hc.facetsBuilder != nil {
+			hc.facetsBuilder.UpdateVisitor(field, term)
+		}
+		hc.sort.UpdateVisitor(field, term)
+	})
+
+	if hc.facetsBuilder != nil {
+		hc.facetsBuilder.EndDoc()
+	}
+
+	return err
+}
+
 // SetFacetsBuilder registers a facet builder for this collector
 func (hc *TopNCollector) SetFacetsBuilder(facetsBuilder *search.FacetsBuilder) {
 	hc.facetsBuilder = facetsBuilder
+	hc.neededFields = append(hc.neededFields, hc.facetsBuilder.RequiredFields()...)
 }
 
 // finalizeResults starts with the heap containing the final top size+skip

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_datetime.go

@@ -18,7 +18,6 @@ import (
 	"sort"
 	"time"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/numeric"
 	"github.com/blevesearch/bleve/search"
 )
@@ -35,6 +34,7 @@ type DateTimeFacetBuilder struct {
 	total      int
 	missing    int
 	ranges     map[string]*dateTimeRange
+	sawValue   bool
 }
 
 func NewDateTimeFacetBuilder(field string, size int) *DateTimeFacetBuilder {
@@ -58,36 +58,35 @@ func (fb *DateTimeFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *DateTimeFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			// only consider the values which are shifted 0
-			prefixCoded := numeric.PrefixCoded(term)
-			shift, err := prefixCoded.Shift()
-			if err == nil && shift == 0 {
-				i64, err := prefixCoded.Int64()
-				if err == nil {
-					t := time.Unix(0, i64)
-
-					// look at each of the ranges for a match
-					for rangeName, r := range fb.ranges {
-
-						if (r.start.IsZero() || t.After(r.start) || t.Equal(r.start)) && (r.end.IsZero() || t.Before(r.end)) {
-
-							existingCount, existed := fb.termsCount[rangeName]
-							if existed {
-								fb.termsCount[rangeName] = existingCount + 1
-							} else {
-								fb.termsCount[rangeName] = 1
-							}
-							fb.total++
-						}
+func (fb *DateTimeFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		// only consider the values which are shifted 0
+		prefixCoded := numeric.PrefixCoded(term)
+		shift, err := prefixCoded.Shift()
+		if err == nil && shift == 0 {
+			i64, err := prefixCoded.Int64()
+			if err == nil {
+				t := time.Unix(0, i64)
+
+				// look at each of the ranges for a match
+				for rangeName, r := range fb.ranges {
+					if (r.start.IsZero() || t.After(r.start) || t.Equal(r.start)) && (r.end.IsZero() || t.Before(r.end)) {
+						fb.termsCount[rangeName] = fb.termsCount[rangeName] + 1
+						fb.total++
 					}
 				}
 			}
 		}
-	} else {
+	}
+}
+
+func (fb *DateTimeFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *DateTimeFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_numeric.go

@@ -17,7 +17,6 @@ package facet
 import (
 	"sort"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/numeric"
 	"github.com/blevesearch/bleve/search"
 )
@@ -34,6 +33,7 @@ type NumericFacetBuilder struct {
 	total      int
 	missing    int
 	ranges     map[string]*numericRange
+	sawValue   bool
 }
 
 func NewNumericFacetBuilder(field string, size int) *NumericFacetBuilder {
@@ -57,36 +57,35 @@ func (fb *NumericFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *NumericFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			// only consider the values which are shifted 0
-			prefixCoded := numeric.PrefixCoded(term)
-			shift, err := prefixCoded.Shift()
-			if err == nil && shift == 0 {
-				i64, err := prefixCoded.Int64()
-				if err == nil {
-					f64 := numeric.Int64ToFloat64(i64)
-
-					// look at each of the ranges for a match
-					for rangeName, r := range fb.ranges {
-
-						if (r.min == nil || f64 >= *r.min) && (r.max == nil || f64 < *r.max) {
-
-							existingCount, existed := fb.termsCount[rangeName]
-							if existed {
-								fb.termsCount[rangeName] = existingCount + 1
-							} else {
-								fb.termsCount[rangeName] = 1
-							}
-							fb.total++
-						}
+func (fb *NumericFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		// only consider the values which are shifted 0
+		prefixCoded := numeric.PrefixCoded(term)
+		shift, err := prefixCoded.Shift()
+		if err == nil && shift == 0 {
+			i64, err := prefixCoded.Int64()
+			if err == nil {
+				f64 := numeric.Int64ToFloat64(i64)
+
+				// look at each of the ranges for a match
+				for rangeName, r := range fb.ranges {
+					if (r.min == nil || f64 >= *r.min) && (r.max == nil || f64 < *r.max) {
+						fb.termsCount[rangeName] = fb.termsCount[rangeName] + 1
+						fb.total++
 					}
 				}
 			}
 		}
-	} else {
+	}
+}
+
+func (fb *NumericFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *NumericFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_terms.go

@@ -17,7 +17,6 @@ package facet
 import (
 	"sort"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/search"
 )
 
@@ -27,6 +26,7 @@ type TermsFacetBuilder struct {
 	termsCount map[string]int
 	total      int
 	missing    int
+	sawValue   bool
 }
 
 func NewTermsFacetBuilder(field string, size int) *TermsFacetBuilder {
@@ -41,19 +41,20 @@ func (fb *TermsFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *TermsFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			existingCount, existed := fb.termsCount[term]
-			if existed {
-				fb.termsCount[term] = existingCount + 1
-			} else {
-				fb.termsCount[term] = 1
-			}
-			fb.total++
-		}
-	} else {
+func (fb *TermsFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		fb.termsCount[string(term)] = fb.termsCount[string(term)] + 1
+		fb.total++
+	}
+}
+
+func (fb *TermsFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *TermsFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

vendor/github.com/blevesearch/bleve/search/facets_builder.go

@@ -21,7 +21,10 @@ import (
 )
 
 type FacetBuilder interface {
-	Update(index.FieldTerms)
+	StartDoc()
+	UpdateVisitor(field string, term []byte)
+	EndDoc()
+
 	Result() *FacetResult
 	Field() string
 }
@@ -41,33 +44,29 @@ func NewFacetsBuilder(indexReader index.IndexReader) *FacetsBuilder {
 
 func (fb *FacetsBuilder) Add(name string, facetBuilder FacetBuilder) {
 	fb.facets[name] = facetBuilder
+	fb.fields = append(fb.fields, facetBuilder.Field())
 }
 
-func (fb *FacetsBuilder) Update(docMatch *DocumentMatch) error {
-	if fb.fields == nil {
-		for _, facetBuilder := range fb.facets {
-			fb.fields = append(fb.fields, facetBuilder.Field())
-		}
+func (fb *FacetsBuilder) RequiredFields() []string {
+	return fb.fields
+}
+
+func (fb *FacetsBuilder) StartDoc() {
+	for _, facetBuilder := range fb.facets {
+		facetBuilder.StartDoc()
 	}
+}
 
-	if len(fb.fields) > 0 {
-		// find out which fields haven't been loaded yet
-		fieldsToLoad := docMatch.CachedFieldTerms.FieldsNotYetCached(fb.fields)
-		// look them up
-		fieldTerms, err := fb.indexReader.DocumentFieldTerms(docMatch.IndexInternalID, fieldsToLoad)
-		if err != nil {
-			return err
-		}
-		// cache these as well
-		if docMatch.CachedFieldTerms == nil {
-			docMatch.CachedFieldTerms = make(map[string][]string)
-		}
-		docMatch.CachedFieldTerms.Merge(fieldTerms)
+func (fb *FacetsBuilder) EndDoc() {
+	for _, facetBuilder := range fb.facets {
+		facetBuilder.EndDoc()
 	}
+}
+
+func (fb *FacetsBuilder) UpdateVisitor(field string, term []byte) {
 	for _, facetBuilder := range fb.facets {
-		facetBuilder.Update(docMatch.CachedFieldTerms)
+		facetBuilder.UpdateVisitor(field, term)
 	}
-	return nil
 }
 
 type TermFacet struct {

vendor/github.com/blevesearch/bleve/search/highlight/format/html/html.go

@@ -44,7 +44,7 @@ func (a *FragmentFormatter) Format(f *highlight.Fragment, orderedTermLocations h
 			continue
 		}
 		// make sure the array positions match
-		if !highlight.SameArrayPositions(f.ArrayPositions, termLocation.ArrayPositions) {
+		if !termLocation.ArrayPositions.Equals(f.ArrayPositions) {
 			continue
 		}
 		if termLocation.Start < curr {

vendor/github.com/blevesearch/bleve/search/highlight/highlighter/simple/fragment_scorer_simple.go

@@ -37,7 +37,7 @@ func (s *FragmentScorer) Score(f *highlight.Fragment) {
 OUTER:
 	for _, locations := range s.tlm {
 		for _, location := range locations {
-			if highlight.SameArrayPositions(f.ArrayPositions, location.ArrayPositions) && int(location.Start) >= f.Start && int(location.End) <= f.End {
+			if location.ArrayPositions.Equals(f.ArrayPositions) && int(location.Start) >= f.Start && int(location.End) <= f.End {
 				score += 1.0
 				// once we find a term in the fragment
 				// don't care about additional matches

vendor/github.com/blevesearch/bleve/search/highlight/highlighter/simple/highlighter_simple.go

@@ -87,7 +87,7 @@ func (s *Highlighter) BestFragmentsInField(dm *search.DocumentMatch, doc *docume
 			if ok {
 				termLocationsSameArrayPosition := make(highlight.TermLocations, 0)
 				for _, otl := range orderedTermLocations {
-					if highlight.SameArrayPositions(f.ArrayPositions(), otl.ArrayPositions) {
+					if otl.ArrayPositions.Equals(f.ArrayPositions()) {
 						termLocationsSameArrayPosition = append(termLocationsSameArrayPosition, otl)
 					}
 				}

vendor/github.com/blevesearch/bleve/search/highlight/term_locations.go

@@ -23,7 +23,7 @@ import (
 
 type TermLocation struct {
 	Term           string
-	ArrayPositions []float64
+	ArrayPositions search.ArrayPositions
 	Pos            int
 	Start          int
 	End            int
@@ -103,15 +103,3 @@ func OrderTermLocations(tlm search.TermLocationMap) TermLocations {
 	sort.Sort(rv)
 	return rv
 }
-
-func SameArrayPositions(fieldArrayPositions []uint64, termLocationArrayPositions []float64) bool {
-	if len(fieldArrayPositions) != len(termLocationArrayPositions) {
-		return false
-	}
-	for i := 0; i < len(fieldArrayPositions); i++ {
-		if fieldArrayPositions[i] != uint64(termLocationArrayPositions[i]) {
-			return false
-		}
-	}
-	return true
-}

vendor/github.com/blevesearch/bleve/search/pool.go

@@ -37,13 +37,17 @@ func defaultDocumentMatchPoolTooSmall(p *DocumentMatchPool) *DocumentMatch {
 // pre-allocated to accommodate the requested number of DocumentMatch
 // instances
 func NewDocumentMatchPool(size, sortsize int) *DocumentMatchPool {
-	avail := make(DocumentMatchCollection, 0, size)
+	avail := make(DocumentMatchCollection, size)
 	// pre-allocate the expected number of instances
 	startBlock := make([]DocumentMatch, size)
+	startSorts := make([]string, size*sortsize)
 	// make these initial instances available
-	for i := range startBlock {
-		startBlock[i].Sort = make([]string, 0, sortsize)
-		avail = append(avail, &startBlock[i])
+	i, j := 0, 0
+	for i < size {
+		avail[i] = &startBlock[i]
+		avail[i].Sort = startSorts[j:j]
+		i += 1
+		j += sortsize
 	}
 	return &DocumentMatchPool{
 		avail:    avail,

vendor/github.com/blevesearch/bleve/search/query/bool_field.go

@@ -22,7 +22,7 @@ import (
 )
 
 type BoolFieldQuery struct {
-	Bool  bool   `json:"bool"`
+	Bool     bool   `json:"bool"`
 	FieldVal string `json:"field,omitempty"`
 	BoostVal *Boost `json:"boost,omitempty"`
 }
@@ -39,20 +39,19 @@ func (q *BoolFieldQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *BoolFieldQuery) Boost() float64{
-		return q.BoostVal.Value()
+func (q *BoolFieldQuery) Boost() float64 {
+	return q.BoostVal.Value()
 }
 
 func (q *BoolFieldQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *BoolFieldQuery) Field() string{
+func (q *BoolFieldQuery) Field() string {
 	return q.FieldVal
 }
 
-
-func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -61,5 +60,5 @@ func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, e
 	if q.Bool {
 		term = "T"
 	}
-	return searcher.NewTermSearcher(i, term, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermSearcher(i, term, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/boolean.go

@@ -25,10 +25,11 @@ import (
 )
 
 type BooleanQuery struct {
-	Must     Query  `json:"must,omitempty"`
-	Should   Query  `json:"should,omitempty"`
-	MustNot  Query  `json:"must_not,omitempty"`
-	BoostVal *Boost `json:"boost,omitempty"`
+	Must            Query  `json:"must,omitempty"`
+	Should          Query  `json:"should,omitempty"`
+	MustNot         Query  `json:"must_not,omitempty"`
+	BoostVal        *Boost `json:"boost,omitempty"`
+	queryStringMode bool
 }
 
 // NewBooleanQuery creates a compound Query composed
@@ -55,6 +56,15 @@ func NewBooleanQuery(must []Query, should []Query, mustNot []Query) *BooleanQuer
 	return &rv
 }
 
+func NewBooleanQueryForQueryString(must []Query, should []Query, mustNot []Query) *BooleanQuery {
+	rv := NewBooleanQuery(nil, nil, nil)
+	rv.queryStringMode = true
+	rv.AddMust(must...)
+	rv.AddShould(should...)
+	rv.AddMustNot(mustNot...)
+	return rv
+}
+
 // SetMinShould requires that at least minShould of the
 // should Queries must be satisfied.
 func (q *BooleanQuery) SetMinShould(minShould float64) {
@@ -63,7 +73,9 @@ func (q *BooleanQuery) SetMinShould(minShould float64) {
 
 func (q *BooleanQuery) AddMust(m ...Query) {
 	if q.Must == nil {
-		q.Must = NewConjunctionQuery([]Query{})
+		tmp := NewConjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.Must = tmp
 	}
 	for _, mq := range m {
 		q.Must.(*ConjunctionQuery).AddQuery(mq)
@@ -72,7 +84,9 @@ func (q *BooleanQuery) AddMust(m ...Query) {
 
 func (q *BooleanQuery) AddShould(m ...Query) {
 	if q.Should == nil {
-		q.Should = NewDisjunctionQuery([]Query{})
+		tmp := NewDisjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.Should = tmp
 	}
 	for _, mq := range m {
 		q.Should.(*DisjunctionQuery).AddQuery(mq)
@@ -81,7 +95,9 @@ func (q *BooleanQuery) AddShould(m ...Query) {
 
 func (q *BooleanQuery) AddMustNot(m ...Query) {
 	if q.MustNot == nil {
-		q.MustNot = NewDisjunctionQuery([]Query{})
+		tmp := NewDisjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.MustNot = tmp
 	}
 	for _, mq := range m {
 		q.MustNot.(*DisjunctionQuery).AddQuery(mq)
@@ -93,44 +109,67 @@ func (q *BooleanQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *BooleanQuery) Boost() float64{
+func (q *BooleanQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *BooleanQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *BooleanQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	var err error
 	var mustNotSearcher search.Searcher
 	if q.MustNot != nil {
-		mustNotSearcher, err = q.MustNot.Searcher(i, m, explain)
+		mustNotSearcher, err = q.MustNot.Searcher(i, m, options)
 		if err != nil {
 			return nil, err
 		}
-		if q.Must == nil && q.Should == nil {
-			q.Must = NewMatchAllQuery()
+		// if must not is MatchNone, reset it to nil
+		if _, ok := mustNotSearcher.(*searcher.MatchNoneSearcher); ok {
+			mustNotSearcher = nil
 		}
 	}
 
 	var mustSearcher search.Searcher
 	if q.Must != nil {
-		mustSearcher, err = q.Must.Searcher(i, m, explain)
+		mustSearcher, err = q.Must.Searcher(i, m, options)
 		if err != nil {
 			return nil, err
 		}
+		// if must searcher is MatchNone, reset it to nil
+		if _, ok := mustSearcher.(*searcher.MatchNoneSearcher); ok {
+			mustSearcher = nil
+		}
 	}
 
 	var shouldSearcher search.Searcher
 	if q.Should != nil {
-		shouldSearcher, err = q.Should.Searcher(i, m, explain)
+		shouldSearcher, err = q.Should.Searcher(i, m, options)
+		if err != nil {
+			return nil, err
+		}
+		// if should searcher is MatchNone, reset it to nil
+		if _, ok := shouldSearcher.(*searcher.MatchNoneSearcher); ok {
+			shouldSearcher = nil
+		}
+	}
+
+	// if all 3 are nil, return MatchNone
+	if mustSearcher == nil && shouldSearcher == nil && mustNotSearcher == nil {
+		return searcher.NewMatchNoneSearcher(i)
+	}
+
+	// if only mustNotSearcher, start with MatchAll
+	if mustSearcher == nil && shouldSearcher == nil && mustNotSearcher != nil {
+		mustSearcher, err = searcher.NewMatchAllSearcher(i, 1.0, options)
 		if err != nil {
 			return nil, err
 		}
 	}
 
+	// optimization, if only should searcher, just return it instead
 	if mustSearcher == nil && shouldSearcher != nil && mustNotSearcher == nil {
 		return shouldSearcher, nil
 	}
 
-	return searcher.NewBooleanSearcher(i, mustSearcher, shouldSearcher, mustNotSearcher, explain)
+	return searcher.NewBooleanSearcher(i, mustSearcher, shouldSearcher, mustNotSearcher, options)
 }
 
 func (q *BooleanQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/conjunction.go

@@ -24,8 +24,9 @@ import (
 )
 
 type ConjunctionQuery struct {
-	Conjuncts []Query `json:"conjuncts"`
-	BoostVal  *Boost  `json:"boost,omitempty"`
+	Conjuncts       []Query `json:"conjuncts"`
+	BoostVal        *Boost  `json:"boost,omitempty"`
+	queryStringMode bool
 }
 
 // NewConjunctionQuery creates a new compound Query.
@@ -41,7 +42,7 @@ func (q *ConjunctionQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *ConjunctionQuery) Boost() float64{
+func (q *ConjunctionQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -51,11 +52,10 @@ func (q *ConjunctionQuery) AddQuery(aq ...Query) {
 	}
 }
 
-func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	ss := make([]search.Searcher, len(q.Conjuncts))
-	for in, conjunct := range q.Conjuncts {
-		var err error
-		ss[in], err = conjunct.Searcher(i, m, explain)
+func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	ss := make([]search.Searcher, 0, len(q.Conjuncts))
+	for _, conjunct := range q.Conjuncts {
+		sr, err := conjunct.Searcher(i, m, options)
 		if err != nil {
 			for _, searcher := range ss {
 				if searcher != nil {
@@ -64,8 +64,16 @@ func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 			}
 			return nil, err
 		}
+		if _, ok := sr.(*searcher.MatchNoneSearcher); ok && q.queryStringMode {
+			// in query string mode, skip match none
+			continue
+		}
+		ss = append(ss, sr)
+	}
+	if len(ss) < 1 {
+		return searcher.NewMatchNoneSearcher(i)
 	}
-	return searcher.NewConjunctionSearcher(i, ss, explain)
+	return searcher.NewConjunctionSearcher(i, ss, options)
 }
 
 func (q *ConjunctionQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/date_range.go

@@ -113,20 +113,19 @@ func (q *DateRangeQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DateRangeQuery) Boost() float64{
+func (q *DateRangeQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
 func (q *DateRangeQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *DateRangeQuery) Field() string{
+func (q *DateRangeQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	min, max, err := q.parseEndpoints()
 	if err != nil {
 		return nil, err
@@ -137,7 +136,7 @@ func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, e
 		field = m.DefaultSearchField()
 	}
 
-	return searcher.NewNumericRangeSearcher(i, min, max, q.InclusiveStart, q.InclusiveEnd, field, q.BoostVal.Value(), explain)
+	return searcher.NewNumericRangeSearcher(i, min, max, q.InclusiveStart, q.InclusiveEnd, field, q.BoostVal.Value(), options)
 }
 
 func (q *DateRangeQuery) parseEndpoints() (*float64, *float64, error) {

vendor/github.com/blevesearch/bleve/search/query/disjunction.go

@@ -25,9 +25,10 @@ import (
 )
 
 type DisjunctionQuery struct {
-	Disjuncts []Query `json:"disjuncts"`
-	BoostVal  *Boost  `json:"boost,omitempty"`
-	Min       float64 `json:"min"`
+	Disjuncts       []Query `json:"disjuncts"`
+	BoostVal        *Boost  `json:"boost,omitempty"`
+	Min             float64 `json:"min"`
+	queryStringMode bool
 }
 
 // NewDisjunctionQuery creates a new compound Query.
@@ -43,11 +44,10 @@ func (q *DisjunctionQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DisjunctionQuery) Boost() float64{
+func (q *DisjunctionQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
 func (q *DisjunctionQuery) AddQuery(aq ...Query) {
 	for _, aaq := range aq {
 		q.Disjuncts = append(q.Disjuncts, aaq)
@@ -58,11 +58,10 @@ func (q *DisjunctionQuery) SetMin(m float64) {
 	q.Min = m
 }
 
-func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	ss := make([]search.Searcher, len(q.Disjuncts))
-	for in, disjunct := range q.Disjuncts {
-		var err error
-		ss[in], err = disjunct.Searcher(i, m, explain)
+func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	ss := make([]search.Searcher, 0, len(q.Disjuncts))
+	for _, disjunct := range q.Disjuncts {
+		sr, err := disjunct.Searcher(i, m, options)
 		if err != nil {
 			for _, searcher := range ss {
 				if searcher != nil {
@@ -71,8 +70,16 @@ func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 			}
 			return nil, err
 		}
+		if _, ok := sr.(*searcher.MatchNoneSearcher); ok && q.queryStringMode {
+			// in query string mode, skip match none
+			continue
+		}
+		ss = append(ss, sr)
+	}
+	if len(ss) < 1 {
+		return searcher.NewMatchNoneSearcher(i)
 	}
-	return searcher.NewDisjunctionSearcher(i, ss, q.Min, explain)
+	return searcher.NewDisjunctionSearcher(i, ss, q.Min, options)
 }
 
 func (q *DisjunctionQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/docid.go

@@ -40,10 +40,10 @@ func (q *DocIDQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DocIDQuery) Boost() float64{
+func (q *DocIDQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *DocIDQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	return searcher.NewDocIDSearcher(i, q.IDs, q.BoostVal.Value(), explain)
+func (q *DocIDQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewDocIDSearcher(i, q.IDs, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/fuzzy.go

@@ -48,7 +48,7 @@ func (q *FuzzyQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *FuzzyQuery) Boost() float64{
+func (q *FuzzyQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -56,7 +56,7 @@ func (q *FuzzyQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *FuzzyQuery) Field() string{
+func (q *FuzzyQuery) Field() string {
 	return q.FieldVal
 }
 
@@ -68,10 +68,10 @@ func (q *FuzzyQuery) SetPrefix(p int) {
 	q.Prefix = p
 }
 
-func (q *FuzzyQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *FuzzyQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewFuzzySearcher(i, q.Term, q.Prefix, q.Fuzziness, field, q.BoostVal.Value(), explain)
+	return searcher.NewFuzzySearcher(i, q.Term, q.Prefix, q.Fuzziness, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/geo_boundingbox.go

@@ -0,0 +1,113 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type GeoBoundingBoxQuery struct {
+	TopLeft     []float64 `json:"top_left,omitempty"`
+	BottomRight []float64 `json:"bottom_right,omitempty"`
+	FieldVal    string    `json:"field,omitempty"`
+	BoostVal    *Boost    `json:"boost,omitempty"`
+}
+
+func NewGeoBoundingBoxQuery(topLeftLon, topLeftLat, bottomRightLon, bottomRightLat float64) *GeoBoundingBoxQuery {
+	return &GeoBoundingBoxQuery{
+		TopLeft:     []float64{topLeftLon, topLeftLat},
+		BottomRight: []float64{bottomRightLon, bottomRightLat},
+	}
+}
+
+func (q *GeoBoundingBoxQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *GeoBoundingBoxQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *GeoBoundingBoxQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *GeoBoundingBoxQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *GeoBoundingBoxQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+
+	if q.BottomRight[0] < q.TopLeft[0] {
+		// cross date line, rewrite as two parts
+
+		leftSearcher, err := searcher.NewGeoBoundingBoxSearcher(i, -180, q.BottomRight[1], q.BottomRight[0], q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+		if err != nil {
+			return nil, err
+		}
+		rightSearcher, err := searcher.NewGeoBoundingBoxSearcher(i, q.TopLeft[0], q.BottomRight[1], 180, q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+		if err != nil {
+			_ = leftSearcher.Close()
+			return nil, err
+		}
+
+		return searcher.NewDisjunctionSearcher(i, []search.Searcher{leftSearcher, rightSearcher}, 0, options)
+	}
+
+	return searcher.NewGeoBoundingBoxSearcher(i, q.TopLeft[0], q.BottomRight[1], q.BottomRight[0], q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+}
+
+func (q *GeoBoundingBoxQuery) Validate() error {
+	return nil
+}
+
+func (q *GeoBoundingBoxQuery) UnmarshalJSON(data []byte) error {
+	tmp := struct {
+		TopLeft     interface{} `json:"top_left,omitempty"`
+		BottomRight interface{} `json:"bottom_right,omitempty"`
+		FieldVal    string      `json:"field,omitempty"`
+		BoostVal    *Boost      `json:"boost,omitempty"`
+	}{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	// now use our generic point parsing code from the geo package
+	lon, lat, found := geo.ExtractGeoPoint(tmp.TopLeft)
+	if !found {
+		return fmt.Errorf("geo location top_left not in a valid format")
+	}
+	q.TopLeft = []float64{lon, lat}
+	lon, lat, found = geo.ExtractGeoPoint(tmp.BottomRight)
+	if !found {
+		return fmt.Errorf("geo location bottom_right not in a valid format")
+	}
+	q.BottomRight = []float64{lon, lat}
+	q.FieldVal = tmp.FieldVal
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/geo_distance.go

@@ -0,0 +1,100 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type GeoDistanceQuery struct {
+	Location []float64 `json:"location,omitempty"`
+	Distance string    `json:"distance,omitempty"`
+	FieldVal string    `json:"field,omitempty"`
+	BoostVal *Boost    `json:"boost,omitempty"`
+}
+
+func NewGeoDistanceQuery(lon, lat float64, distance string) *GeoDistanceQuery {
+	return &GeoDistanceQuery{
+		Location: []float64{lon, lat},
+		Distance: distance,
+	}
+}
+
+func (q *GeoDistanceQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *GeoDistanceQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *GeoDistanceQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *GeoDistanceQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *GeoDistanceQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
+	options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+
+	dist, err := geo.ParseDistance(q.Distance)
+	if err != nil {
+		return nil, err
+	}
+
+	return searcher.NewGeoPointDistanceSearcher(i, q.Location[0], q.Location[1],
+		dist, field, q.BoostVal.Value(), options)
+}
+
+func (q *GeoDistanceQuery) Validate() error {
+	return nil
+}
+
+func (q *GeoDistanceQuery) UnmarshalJSON(data []byte) error {
+	tmp := struct {
+		Location interface{} `json:"location,omitempty"`
+		Distance string      `json:"distance,omitempty"`
+		FieldVal string      `json:"field,omitempty"`
+		BoostVal *Boost      `json:"boost,omitempty"`
+	}{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	// now use our generic point parsing code from the geo package
+	lon, lat, found := geo.ExtractGeoPoint(tmp.Location)
+	if !found {
+		return fmt.Errorf("geo location not in a valid format")
+	}
+	q.Location = []float64{lon, lat}
+	q.Distance = tmp.Distance
+	q.FieldVal = tmp.FieldVal
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/match.go

@@ -90,7 +90,7 @@ func (q *MatchQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchQuery) Boost() float64{
+func (q *MatchQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -98,7 +98,7 @@ func (q *MatchQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *MatchQuery) Field() string{
+func (q *MatchQuery) Field() string {
 	return q.FieldVal
 }
 
@@ -114,7 +114,7 @@ func (q *MatchQuery) SetOperator(operator MatchQueryOperator) {
 	q.Operator = operator
 }
 
-func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 
 	field := q.FieldVal
 	if q.FieldVal == "" {
@@ -160,17 +160,17 @@ func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, expla
 			shouldQuery := NewDisjunctionQuery(tqs)
 			shouldQuery.SetMin(1)
 			shouldQuery.SetBoost(q.BoostVal.Value())
-			return shouldQuery.Searcher(i, m, explain)
+			return shouldQuery.Searcher(i, m, options)
 
 		case MatchQueryOperatorAnd:
 			mustQuery := NewConjunctionQuery(tqs)
 			mustQuery.SetBoost(q.BoostVal.Value())
-			return mustQuery.Searcher(i, m, explain)
+			return mustQuery.Searcher(i, m, options)
 
 		default:
 			return nil, fmt.Errorf("unhandled operator %d", q.Operator)
 		}
 	}
 	noneQuery := NewMatchNoneQuery()
-	return noneQuery.Searcher(i, m, explain)
+	return noneQuery.Searcher(i, m, options)
 }

vendor/github.com/blevesearch/bleve/search/query/match_all.go

@@ -38,14 +38,12 @@ func (q *MatchAllQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchAllQuery) Boost() float64{
+func (q *MatchAllQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
-
-func (q *MatchAllQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	return searcher.NewMatchAllSearcher(i, q.BoostVal.Value(), explain)
+func (q *MatchAllQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewMatchAllSearcher(i, q.BoostVal.Value(), options)
 }
 
 func (q *MatchAllQuery) MarshalJSON() ([]byte, error) {

vendor/github.com/blevesearch/bleve/search/query/match_none.go

@@ -38,11 +38,11 @@ func (q *MatchNoneQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchNoneQuery) Boost() float64{
+func (q *MatchNoneQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *MatchNoneQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchNoneQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	return searcher.NewMatchNoneSearcher(i)
 }
 

vendor/github.com/blevesearch/bleve/search/query/match_phrase.go

@@ -49,7 +49,7 @@ func (q *MatchPhraseQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchPhraseQuery) Boost() float64{
+func (q *MatchPhraseQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -57,11 +57,11 @@ func (q *MatchPhraseQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *MatchPhraseQuery) Field() string{
+func (q *MatchPhraseQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -81,15 +81,15 @@ func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 	tokens := analyzer.Analyze([]byte(q.MatchPhrase))
 	if len(tokens) > 0 {
 		phrase := tokenStreamToPhrase(tokens)
-		phraseQuery := NewPhraseQuery(phrase, field)
+		phraseQuery := NewMultiPhraseQuery(phrase, field)
 		phraseQuery.SetBoost(q.BoostVal.Value())
-		return phraseQuery.Searcher(i, m, explain)
+		return phraseQuery.Searcher(i, m, options)
 	}
 	noneQuery := NewMatchNoneQuery()
-	return noneQuery.Searcher(i, m, explain)
+	return noneQuery.Searcher(i, m, options)
 }
 
-func tokenStreamToPhrase(tokens analysis.TokenStream) []string {
+func tokenStreamToPhrase(tokens analysis.TokenStream) [][]string {
 	firstPosition := int(^uint(0) >> 1)
 	lastPosition := 0
 	for _, token := range tokens {
@@ -102,13 +102,10 @@ func tokenStreamToPhrase(tokens analysis.TokenStream) []string {
 	}
 	phraseLen := lastPosition - firstPosition + 1
 	if phraseLen > 0 {
-		rv := make([]string, phraseLen)
-		for i := 0; i < phraseLen; i++ {
-			rv[i] = ""
-		}
+		rv := make([][]string, phraseLen)
 		for _, token := range tokens {
 			pos := token.Position - firstPosition
-			rv[pos] = string(token.Term)
+			rv[pos] = append(rv[pos], string(token.Term))
 		}
 		return rv
 	}

vendor/github.com/blevesearch/bleve/search/query/multi_phrase.go

@@ -0,0 +1,80 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type MultiPhraseQuery struct {
+	Terms    [][]string `json:"terms"`
+	Field    string     `json:"field,omitempty"`
+	BoostVal *Boost     `json:"boost,omitempty"`
+}
+
+// NewMultiPhraseQuery creates a new Query for finding
+// term phrases in the index.
+// It is like PhraseQuery, but each position in the
+// phrase may be satisfied by a list of terms
+// as opposed to just one.
+// At least one of the terms must exist in the correct
+// order, at the correct index offsets, in the
+// specified field. Queried field must have been indexed with
+// IncludeTermVectors set to true.
+func NewMultiPhraseQuery(terms [][]string, field string) *MultiPhraseQuery {
+	return &MultiPhraseQuery{
+		Terms: terms,
+		Field: field,
+	}
+}
+
+func (q *MultiPhraseQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *MultiPhraseQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *MultiPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewMultiPhraseSearcher(i, q.Terms, q.Field, options)
+}
+
+func (q *MultiPhraseQuery) Validate() error {
+	if len(q.Terms) < 1 {
+		return fmt.Errorf("phrase query must contain at least one term")
+	}
+	return nil
+}
+
+func (q *MultiPhraseQuery) UnmarshalJSON(data []byte) error {
+	type _mphraseQuery MultiPhraseQuery
+	tmp := _mphraseQuery{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	q.Terms = tmp.Terms
+	q.Field = tmp.Field
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/numeric_range.go

@@ -59,7 +59,7 @@ func (q *NumericRangeQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *NumericRangeQuery) Boost() float64{
+func (q *NumericRangeQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -67,16 +67,16 @@ func (q *NumericRangeQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *NumericRangeQuery) Field() string{
+func (q *NumericRangeQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *NumericRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *NumericRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewNumericRangeSearcher(i, q.Min, q.Max, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), explain)
+	return searcher.NewNumericRangeSearcher(i, q.Min, q.Max, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), options)
 }
 
 func (q *NumericRangeQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/phrase.go

@@ -25,10 +25,9 @@ import (
 )
 
 type PhraseQuery struct {
-	Terms       []string `json:"terms"`
-	Field       string   `json:"field,omitempty"`
-	BoostVal    *Boost   `json:"boost,omitempty"`
-	termQueries []Query
+	Terms    []string `json:"terms"`
+	Field    string   `json:"field,omitempty"`
+	BoostVal *Boost   `json:"boost,omitempty"`
 }
 
 // NewPhraseQuery creates a new Query for finding
@@ -38,18 +37,9 @@ type PhraseQuery struct {
 // specified field. Queried field must have been indexed with
 // IncludeTermVectors set to true.
 func NewPhraseQuery(terms []string, field string) *PhraseQuery {
-	termQueries := make([]Query, 0)
-	for _, term := range terms {
-		if term != "" {
-			tq := NewTermQuery(term)
-			tq.SetField(field)
-			termQueries = append(termQueries, tq)
-		}
-	}
 	return &PhraseQuery{
-		Terms:       terms,
-		Field:       field,
-		termQueries: termQueries,
+		Terms: terms,
+		Field: field,
 	}
 }
 
@@ -58,22 +48,16 @@ func (q *PhraseQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *PhraseQuery) Boost() float64{
+func (q *PhraseQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-
-	conjunctionQuery := NewConjunctionQuery(q.termQueries)
-	conjunctionSearcher, err := conjunctionQuery.Searcher(i, m, explain)
-	if err != nil {
-		return nil, err
-	}
-	return searcher.NewPhraseSearcher(i, conjunctionSearcher.(*searcher.ConjunctionSearcher), q.Terms)
+func (q *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewPhraseSearcher(i, q.Terms, q.Field, options)
 }
 
 func (q *PhraseQuery) Validate() error {
-	if len(q.termQueries) < 1 {
+	if len(q.Terms) < 1 {
 		return fmt.Errorf("phrase query must contain at least one term")
 	}
 	return nil
@@ -89,9 +73,5 @@ func (q *PhraseQuery) UnmarshalJSON(data []byte) error {
 	q.Terms = tmp.Terms
 	q.Field = tmp.Field
 	q.BoostVal = tmp.BoostVal
-	q.termQueries = make([]Query, len(q.Terms))
-	for i, term := range q.Terms {
-		q.termQueries[i] = &TermQuery{Term: term, FieldVal: q.Field, BoostVal: q.BoostVal}
-	}
 	return nil
 }

vendor/github.com/blevesearch/bleve/search/query/prefix.go

@@ -41,7 +41,7 @@ func (q *PrefixQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *PrefixQuery) Boost() float64{
+func (q *PrefixQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -49,14 +49,14 @@ func (q *PrefixQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *PrefixQuery) Field() string{
+func (q *PrefixQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *PrefixQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *PrefixQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewTermPrefixSearcher(i, q.Prefix, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermPrefixSearcher(i, q.Prefix, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/query.go

@@ -36,7 +36,8 @@ func SetLog(l *log.Logger) {
 // A Query represents a description of the type
 // and parameters for a query into the index.
 type Query interface {
-	Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error)
+	Searcher(i index.IndexReader, m mapping.IndexMapping,
+		options search.SearcherOptions) (search.Searcher, error)
 }
 
 // A BoostableQuery represents a Query which can be boosted
@@ -122,7 +123,13 @@ func ParseQuery(input []byte) (Query, error) {
 		var rv PhraseQuery
 		err := json.Unmarshal(input, &rv)
 		if err != nil {
-			return nil, err
+			// now try multi-phrase
+			var rv2 MultiPhraseQuery
+			err = json.Unmarshal(input, &rv2)
+			if err != nil {
+				return nil, err
+			}
+			return &rv2, nil
 		}
 		return &rv, nil
 	}
@@ -154,8 +161,8 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
-	_, hasMin := tmp["min"]
-	_, hasMax := tmp["max"]
+	_, hasMin := tmp["min"].(float64)
+	_, hasMax := tmp["max"].(float64)
 	if hasMin || hasMax {
 		var rv NumericRangeQuery
 		err := json.Unmarshal(input, &rv)
@@ -164,6 +171,16 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
+	_, hasMinStr := tmp["min"].(string)
+	_, hasMaxStr := tmp["max"].(string)
+	if hasMinStr || hasMaxStr {
+		var rv TermRangeQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
 	_, hasStart := tmp["start"]
 	_, hasEnd := tmp["end"]
 	if hasStart || hasEnd {
@@ -237,6 +254,25 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
+	_, hasTopLeft := tmp["top_left"]
+	_, hasBottomRight := tmp["bottom_right"]
+	if hasTopLeft && hasBottomRight {
+		var rv GeoBoundingBoxQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
+	_, hasDistance := tmp["distance"]
+	if hasDistance {
+		var rv GeoDistanceQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
 	return nil, fmt.Errorf("unknown query type")
 }
 
@@ -300,14 +336,6 @@ func expandQuery(m mapping.IndexMapping, query Query) (Query, error) {
 				return nil, err
 			}
 			return &q, nil
-		case *PhraseQuery:
-			q := *query.(*PhraseQuery)
-			children, err := expandSlice(q.termQueries)
-			if err != nil {
-				return nil, err
-			}
-			q.termQueries = children
-			return &q, nil
 		default:
 			return query, nil
 		}

vendor/github.com/blevesearch/bleve/search/query/query_string.go

@@ -39,16 +39,20 @@ func (q *QueryStringQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *QueryStringQuery) Boost() float64{
+func (q *QueryStringQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *QueryStringQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *QueryStringQuery) Parse() (Query, error) {
+	return parseQuerySyntax(q.Query)
+}
+
+func (q *QueryStringQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	newQuery, err := parseQuerySyntax(q.Query)
 	if err != nil {
 		return nil, err
 	}
-	return newQuery.Searcher(i, m, explain)
+	return newQuery.Searcher(i, m, options)
 }
 
 func (q *QueryStringQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/query_string.y

@@ -27,6 +27,7 @@ tEQUAL tTILDE
 %type <s>                tSTRING
 %type <s>                tPHRASE
 %type <s>                tNUMBER
+%type <s>                posOrNegNumber
 %type <s>                tTILDE
 %type <s>                tBOOST
 %type <q>                searchBase
@@ -127,7 +128,15 @@ tSTRING tCOLON tSTRING tTILDE {
 tNUMBER {
 	str := $1
 	logDebugGrammar("STRING - %s", str)
-	q := NewMatchQuery(str)
+	q1 := NewMatchQuery(str)
+	val, err := strconv.ParseFloat($1, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
+	inclusive := true
+	q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+	q := NewDisjunctionQuery([]Query{q1,q2})
+	q.queryStringMode = true
 	$$ = q
 }
 |
@@ -154,12 +163,21 @@ tSTRING tCOLON tSTRING {
 	$$ = q
 }
 |
-tSTRING tCOLON tNUMBER {
+tSTRING tCOLON posOrNegNumber {
 	field := $1
 	str := $3
 	logDebugGrammar("FIELD - %s STRING - %s", field, str)
-	q := NewMatchQuery(str)
-	q.SetField(field)
+	q1 := NewMatchQuery(str)
+	q1.SetField(field)
+	val, err := strconv.ParseFloat($3, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
+	inclusive := true
+	q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+	q2.SetField(field)
+	q := NewDisjunctionQuery([]Query{q1,q2})
+	q.queryStringMode = true
 	$$ = q
 }
 |
@@ -172,9 +190,12 @@ tSTRING tCOLON tPHRASE {
 	$$ = q
 }
 |
-tSTRING tCOLON tGREATER tNUMBER {
+tSTRING tCOLON tGREATER posOrNegNumber {
 	field := $1
-	min, _ := strconv.ParseFloat($4, 64)
+	min, err := strconv.ParseFloat($4, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	minInclusive := false
 	logDebugGrammar("FIELD - GREATER THAN %f", min)
 	q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -182,9 +203,12 @@ tSTRING tCOLON tGREATER tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tGREATER tEQUAL tNUMBER {
+tSTRING tCOLON tGREATER tEQUAL posOrNegNumber {
 	field := $1
-	min, _ := strconv.ParseFloat($5, 64)
+	min, err := strconv.ParseFloat($5, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	minInclusive := true
 	logDebugGrammar("FIELD - GREATER THAN OR EQUAL %f", min)
 	q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -192,9 +216,12 @@ tSTRING tCOLON tGREATER tEQUAL tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tLESS tNUMBER {
+tSTRING tCOLON tLESS posOrNegNumber {
 	field := $1
-	max, _ := strconv.ParseFloat($4, 64)
+	max, err := strconv.ParseFloat($4, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	maxInclusive := false
 	logDebugGrammar("FIELD - LESS THAN %f", max)
 	q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -202,9 +229,12 @@ tSTRING tCOLON tLESS tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tLESS tEQUAL tNUMBER {
+tSTRING tCOLON tLESS tEQUAL posOrNegNumber {
 	field := $1
-	max, _ := strconv.ParseFloat($5, 64)
+	max, err := strconv.ParseFloat($5, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	maxInclusive := true
 	logDebugGrammar("FIELD - LESS THAN OR EQUAL %f", max)
 	q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -287,3 +317,12 @@ tBOOST {
 	}
 	logDebugGrammar("BOOST %f", boost)
 };
+
+posOrNegNumber:
+tNUMBER {
+	$$ = $1
+}
+|
+tMINUS tNUMBER {
+	$$ = "-" + $2
+};

vendor/github.com/blevesearch/bleve/search/query/query_string.y.go

@@ -70,57 +70,58 @@ var yyExca = [...]int{
 	-2, 5,
 }
 
-const yyNprod = 26
+const yyNprod = 28
 const yyPrivate = 57344
 
 var yyTokenNames []string
 var yyStates []string
 
-const yyLast = 31
+const yyLast = 42
 
 var yyAct = [...]int{
 
-	16, 18, 21, 13, 27, 24, 17, 19, 20, 25,
-	22, 15, 26, 23, 9, 11, 31, 14, 29, 3,
-	10, 30, 2, 28, 5, 6, 7, 1, 4, 12,
-	8,
+	17, 16, 18, 23, 22, 30, 3, 21, 19, 20,
+	29, 26, 22, 22, 1, 21, 21, 15, 28, 25,
+	24, 27, 34, 14, 22, 13, 31, 21, 32, 33,
+	22, 9, 11, 21, 5, 6, 2, 10, 4, 12,
+	7, 8,
 }
 var yyPact = [...]int{
 
-	18, -1000, -1000, 18, 10, -1000, -1000, -1000, -6, 3,
-	-1000, -1000, -1000, -1000, -1000, -4, -12, -1000, -1000, 0,
-	-1, -1000, -1000, 13, -1000, -1000, 11, -1000, -1000, -1000,
-	-1000, -1000,
+	28, -1000, -1000, 28, 27, -1000, -1000, -1000, 16, 9,
+	-1000, -1000, -1000, -1000, -1000, -3, -11, -1000, -1000, 6,
+	5, -1000, -5, -1000, -1000, 23, -1000, -1000, 17, -1000,
+	-1000, -1000, -1000, -1000, -1000,
 }
 var yyPgo = [...]int{
 
-	0, 30, 29, 28, 27, 22, 19,
+	0, 0, 41, 39, 38, 14, 36, 6,
 }
 var yyR1 = [...]int{
 
-	0, 4, 5, 5, 6, 3, 3, 3, 1, 1,
-	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 1, 1, 2, 2,
+	0, 5, 6, 6, 7, 4, 4, 4, 2, 2,
+	2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+	2, 2, 2, 2, 3, 3, 1, 1,
 }
 var yyR2 = [...]int{
 
 	0, 1, 2, 1, 3, 0, 1, 1, 1, 2,
 	4, 1, 1, 3, 3, 3, 4, 5, 4, 5,
-	4, 5, 4, 5, 0, 1,
+	4, 5, 4, 5, 0, 1, 1, 2,
 }
 var yyChk = [...]int{
 
-	-1000, -4, -5, -6, -3, 6, 7, -5, -1, 4,
-	10, 5, -2, 9, 14, 8, 4, 10, 5, 11,
-	12, 14, 10, 13, 5, 10, 13, 5, 10, 5,
-	10, 5,
+	-1000, -5, -6, -7, -4, 6, 7, -6, -2, 4,
+	10, 5, -3, 9, 14, 8, 4, -1, 5, 11,
+	12, 10, 7, 14, -1, 13, 5, -1, 13, 5,
+	10, -1, 5, -1, 5,
 }
 var yyDef = [...]int{
 
 	5, -2, 1, -2, 0, 6, 7, 2, 24, 8,
 	11, 12, 4, 25, 9, 0, 13, 14, 15, 0,
-	0, 10, 16, 0, 20, 18, 0, 22, 17, 21,
-	19, 23,
+	0, 26, 0, 10, 16, 0, 20, 18, 0, 22,
+	27, 17, 21, 19, 23,
 }
 var yyTok1 = [...]int{
 
@@ -474,25 +475,25 @@ yydefault:
 
 	case 1:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:39
+		//line query_string.y:40
 		{
 			logDebugGrammar("INPUT")
 		}
 	case 2:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line query_string.y:44
+		//line query_string.y:45
 		{
 			logDebugGrammar("SEARCH PARTS")
 		}
 	case 3:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:48
+		//line query_string.y:49
 		{
 			logDebugGrammar("SEARCH PART")
 		}
 	case 4:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:53
+		//line query_string.y:54
 		{
 			query := yyDollar[2].q
 			if yyDollar[3].pf != nil {
@@ -511,27 +512,27 @@ yydefault:
 		}
 	case 5:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line query_string.y:72
+		//line query_string.y:73
 		{
 			yyVAL.n = queryShould
 		}
 	case 6:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:76
+		//line query_string.y:77
 		{
 			logDebugGrammar("PLUS")
 			yyVAL.n = queryMust
 		}
 	case 7:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:81
+		//line query_string.y:82
 		{
 			logDebugGrammar("MINUS")
 			yyVAL.n = queryMustNot
 		}
 	case 8:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:87
+		//line query_string.y:88
 		{
 			str := yyDollar[1].s
 			logDebugGrammar("STRING - %s", str)
@@ -547,7 +548,7 @@ yydefault:
 		}
 	case 9:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line query_string.y:101
+		//line query_string.y:102
 		{
 			str := yyDollar[1].s
 			fuzziness, err := strconv.ParseFloat(yyDollar[2].s, 64)
@@ -561,7 +562,7 @@ yydefault:
 		}
 	case 10:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:113
+		//line query_string.y:114
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
@@ -577,16 +578,24 @@ yydefault:
 		}
 	case 11:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:127
+		//line query_string.y:128
 		{
 			str := yyDollar[1].s
 			logDebugGrammar("STRING - %s", str)
-			q := NewMatchQuery(str)
+			q1 := NewMatchQuery(str)
+			val, err := strconv.ParseFloat(yyDollar[1].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
+			inclusive := true
+			q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+			q := NewDisjunctionQuery([]Query{q1, q2})
+			q.queryStringMode = true
 			yyVAL.q = q
 		}
 	case 12:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:134
+		//line query_string.y:143
 		{
 			phrase := yyDollar[1].s
 			logDebugGrammar("PHRASE - %s", phrase)
@@ -595,7 +604,7 @@ yydefault:
 		}
 	case 13:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:141
+		//line query_string.y:150
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
@@ -613,18 +622,27 @@ yydefault:
 		}
 	case 14:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:157
+		//line query_string.y:166
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
 			logDebugGrammar("FIELD - %s STRING - %s", field, str)
-			q := NewMatchQuery(str)
-			q.SetField(field)
+			q1 := NewMatchQuery(str)
+			q1.SetField(field)
+			val, err := strconv.ParseFloat(yyDollar[3].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
+			inclusive := true
+			q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+			q2.SetField(field)
+			q := NewDisjunctionQuery([]Query{q1, q2})
+			q.queryStringMode = true
 			yyVAL.q = q
 		}
 	case 15:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:166
+		//line query_string.y:184
 		{
 			field := yyDollar[1].s
 			phrase := yyDollar[3].s
@@ -635,10 +653,13 @@ yydefault:
 		}
 	case 16:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:175
+		//line query_string.y:193
 		{
 			field := yyDollar[1].s
-			min, _ := strconv.ParseFloat(yyDollar[4].s, 64)
+			min, err := strconv.ParseFloat(yyDollar[4].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			minInclusive := false
 			logDebugGrammar("FIELD - GREATER THAN %f", min)
 			q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -647,10 +668,13 @@ yydefault:
 		}
 	case 17:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:185
+		//line query_string.y:206
 		{
 			field := yyDollar[1].s
-			min, _ := strconv.ParseFloat(yyDollar[5].s, 64)
+			min, err := strconv.ParseFloat(yyDollar[5].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			minInclusive := true
 			logDebugGrammar("FIELD - GREATER THAN OR EQUAL %f", min)
 			q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -659,10 +683,13 @@ yydefault:
 		}
 	case 18:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:195
+		//line query_string.y:219
 		{
 			field := yyDollar[1].s
-			max, _ := strconv.ParseFloat(yyDollar[4].s, 64)
+			max, err := strconv.ParseFloat(yyDollar[4].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			maxInclusive := false
 			logDebugGrammar("FIELD - LESS THAN %f", max)
 			q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -671,10 +698,13 @@ yydefault:
 		}
 	case 19:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:205
+		//line query_string.y:232
 		{
 			field := yyDollar[1].s
-			max, _ := strconv.ParseFloat(yyDollar[5].s, 64)
+			max, err := strconv.ParseFloat(yyDollar[5].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			maxInclusive := true
 			logDebugGrammar("FIELD - LESS THAN OR EQUAL %f", max)
 			q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -683,7 +713,7 @@ yydefault:
 		}
 	case 20:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:215
+		//line query_string.y:245
 		{
 			field := yyDollar[1].s
 			minInclusive := false
@@ -700,7 +730,7 @@ yydefault:
 		}
 	case 21:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:230
+		//line query_string.y:260
 		{
 			field := yyDollar[1].s
 			minInclusive := true
@@ -717,7 +747,7 @@ yydefault:
 		}
 	case 22:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:245
+		//line query_string.y:275
 		{
 			field := yyDollar[1].s
 			maxInclusive := false
@@ -734,7 +764,7 @@ yydefault:
 		}
 	case 23:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:260
+		//line query_string.y:290
 		{
 			field := yyDollar[1].s
 			maxInclusive := true
@@ -751,13 +781,13 @@ yydefault:
 		}
 	case 24:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line query_string.y:276
+		//line query_string.y:306
 		{
 			yyVAL.pf = nil
 		}
 	case 25:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:280
+		//line query_string.y:310
 		{
 			yyVAL.pf = nil
 			boost, err := strconv.ParseFloat(yyDollar[1].s, 64)
@@ -768,6 +798,18 @@ yydefault:
 			}
 			logDebugGrammar("BOOST %f", boost)
 		}
+	case 26:
+		yyDollar = yyS[yypt-1 : yypt+1]
+		//line query_string.y:322
+		{
+			yyVAL.s = yyDollar[1].s
+		}
+	case 27:
+		yyDollar = yyS[yypt-2 : yypt+1]
+		//line query_string.y:326
+		{
+			yyVAL.s = "-" + yyDollar[2].s
+		}
 	}
 	goto yystack /* stack new state and value */
 }

vendor/github.com/blevesearch/bleve/search/query/query_string_parser.go

@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:generate go tool yacc -o query_string.y.go query_string.y
+// as of Go 1.8 this requires the goyacc external tool
+// available from golang.org/x/tools/cmd/goyacc
+
+//go:generate goyacc -o query_string.y.go query_string.y
 //go:generate sed -i.tmp -e 1d query_string.y.go
 //go:generate rm query_string.y.go.tmp
 
@@ -31,6 +34,9 @@ var debugParser bool
 var debugLexer bool
 
 func parseQuerySyntax(query string) (rq Query, err error) {
+	if query == "" {
+		return NewMatchNoneQuery(), nil
+	}
 	lex := newLexerWrapper(newQueryStringLex(strings.NewReader(query)))
 	doParse(lex)
 
@@ -66,7 +72,7 @@ type lexerWrapper struct {
 func newLexerWrapper(lex yyLexer) *lexerWrapper {
 	return &lexerWrapper{
 		lex:   lex,
-		query: NewBooleanQuery(nil, nil, nil),
+		query: NewBooleanQueryForQueryString(nil, nil, nil),
 	}
 }
 

vendor/github.com/blevesearch/bleve/search/query/regexp.go

@@ -33,7 +33,9 @@ type RegexpQuery struct {
 
 // NewRegexpQuery creates a new Query which finds
 // documents containing terms that match the
-// specified regular expression.
+// specified regular expression.  The regexp pattern
+// SHOULD NOT include ^ or $ modifiers, the search
+// will only match entire terms even without them.
 func NewRegexpQuery(regexp string) *RegexpQuery {
 	return &RegexpQuery{
 		Regexp: regexp,
@@ -45,7 +47,7 @@ func (q *RegexpQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *RegexpQuery) Boost() float64{
+func (q *RegexpQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -53,11 +55,11 @@ func (q *RegexpQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *RegexpQuery) Field() string{
+func (q *RegexpQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -67,7 +69,7 @@ func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, expl
 		return nil, err
 	}
 
-	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), explain)
+	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), options)
 }
 
 func (q *RegexpQuery) Validate() error {
@@ -76,14 +78,14 @@ func (q *RegexpQuery) Validate() error {
 
 func (q *RegexpQuery) compile() error {
 	if q.compiled == nil {
-		// require that pattern be anchored to start and end of term
+		// require that pattern NOT be anchored to start and end of term
 		actualRegexp := q.Regexp
-		if !strings.HasPrefix(actualRegexp, "^") {
-			actualRegexp = "^" + actualRegexp
-		}
-		if !strings.HasSuffix(actualRegexp, "$") {
-			actualRegexp = actualRegexp + "$"
+		if strings.HasPrefix(actualRegexp, "^") {
+			actualRegexp = actualRegexp[1:] // remove leading ^
 		}
+		// do not attempt to remove trailing $, it's presence is not
+		// known to interfere with LiteralPrefix() the way ^ does
+		// and removing $ introduces possible ambiguities with escaped \$, \\$, etc
 		var err error
 		q.compiled, err = regexp.Compile(actualRegexp)
 		if err != nil {

vendor/github.com/blevesearch/bleve/search/query/term.go

@@ -40,7 +40,7 @@ func (q *TermQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *TermQuery) Boost() float64{
+func (q *TermQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -48,14 +48,14 @@ func (q *TermQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *TermQuery) Field() string{
+func (q *TermQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *TermQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *TermQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewTermSearcher(i, q.Term, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermSearcher(i, q.Term, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/term_range.go

@@ -0,0 +1,95 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type TermRangeQuery struct {
+	Min          string `json:"min,omitempty"`
+	Max          string `json:"max,omitempty"`
+	InclusiveMin *bool  `json:"inclusive_min,omitempty"`
+	InclusiveMax *bool  `json:"inclusive_max,omitempty"`
+	FieldVal     string `json:"field,omitempty"`
+	BoostVal     *Boost `json:"boost,omitempty"`
+}
+
+// NewTermRangeQuery creates a new Query for ranges
+// of text term values.
+// Either, but not both endpoints can be nil.
+// The minimum value is inclusive.
+// The maximum value is exclusive.
+func NewTermRangeQuery(min, max string) *TermRangeQuery {
+	return NewTermRangeInclusiveQuery(min, max, nil, nil)
+}
+
+// NewTermRangeInclusiveQuery creates a new Query for ranges
+// of numeric values.
+// Either, but not both endpoints can be nil.
+// Control endpoint inclusion with inclusiveMin, inclusiveMax.
+func NewTermRangeInclusiveQuery(min, max string, minInclusive, maxInclusive *bool) *TermRangeQuery {
+	return &TermRangeQuery{
+		Min:          min,
+		Max:          max,
+		InclusiveMin: minInclusive,
+		InclusiveMax: maxInclusive,
+	}
+}
+
+func (q *TermRangeQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *TermRangeQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *TermRangeQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *TermRangeQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *TermRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+	var minTerm []byte
+	if q.Min != "" {
+		minTerm = []byte(q.Min)
+	}
+	var maxTerm []byte
+	if q.Max != "" {
+		maxTerm = []byte(q.Max)
+	}
+	return searcher.NewTermRangeSearcher(i, minTerm, maxTerm, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), options)
+}
+
+func (q *TermRangeQuery) Validate() error {
+	if q.Min == "" && q.Min == q.Max {
+		return fmt.Errorf("term range query must specify min or max")
+	}
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/wildcard.go

@@ -66,7 +66,7 @@ func (q *WildcardQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *WildcardQuery) Boost() float64{
+func (q *WildcardQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -74,11 +74,11 @@ func (q *WildcardQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *WildcardQuery) Field() string{
+func (q *WildcardQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -91,7 +91,7 @@ func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, ex
 		}
 	}
 
-	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), explain)
+	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), options)
 }
 
 func (q *WildcardQuery) Validate() error {
@@ -101,6 +101,6 @@ func (q *WildcardQuery) Validate() error {
 }
 
 func (q *WildcardQuery) convertToRegexp() (*regexp.Regexp, error) {
-	regexpString := "^" + wildcardRegexpReplacer.Replace(q.Wildcard) + "$"
+	regexpString := wildcardRegexpReplacer.Replace(q.Wildcard)
 	return regexp.Compile(regexpString)
 }

vendor/github.com/blevesearch/bleve/search/scorer/scorer_conjunction.go

@@ -19,26 +19,26 @@ import (
 )
 
 type ConjunctionQueryScorer struct {
-	explain bool
+	options search.SearcherOptions
 }
 
-func NewConjunctionQueryScorer(explain bool) *ConjunctionQueryScorer {
+func NewConjunctionQueryScorer(options search.SearcherOptions) *ConjunctionQueryScorer {
 	return &ConjunctionQueryScorer{
-		explain: explain,
+		options: options,
 	}
 }
 
 func (s *ConjunctionQueryScorer) Score(ctx *search.SearchContext, constituents []*search.DocumentMatch) *search.DocumentMatch {
 	var sum float64
 	var childrenExplanations []*search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations = make([]*search.Explanation, len(constituents))
 	}
 
 	locations := []search.FieldTermLocationMap{}
 	for i, docMatch := range constituents {
 		sum += docMatch.Score
-		if s.explain {
+		if s.options.Explain {
 			childrenExplanations[i] = docMatch.Expl
 		}
 		if docMatch.Locations != nil {
@@ -47,7 +47,7 @@ func (s *ConjunctionQueryScorer) Score(ctx *search.SearchContext, constituents [
 	}
 	newScore := sum
 	var newExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		newExpl = &search.Explanation{Value: sum, Message: "sum of:", Children: childrenExplanations}
 	}
 

vendor/github.com/blevesearch/bleve/search/scorer/scorer_constant.go

@@ -24,15 +24,15 @@ import (
 type ConstantScorer struct {
 	constant               float64
 	boost                  float64
-	explain                bool
+	options                search.SearcherOptions
 	queryNorm              float64
 	queryWeight            float64
 	queryWeightExplanation *search.Explanation
 }
 
-func NewConstantScorer(constant float64, boost float64, explain bool) *ConstantScorer {
+func NewConstantScorer(constant float64, boost float64, options search.SearcherOptions) *ConstantScorer {
 	rv := ConstantScorer{
-		explain:     explain,
+		options:     options,
 		queryWeight: 1.0,
 		constant:    constant,
 		boost:       boost,
@@ -52,7 +52,7 @@ func (s *ConstantScorer) SetQueryNorm(qnorm float64) {
 	// update the query weight
 	s.queryWeight = s.boost * s.queryNorm
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 2)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   s.boost,
@@ -75,7 +75,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 
 	score := s.constant
 
-	if s.explain {
+	if s.options.Explain {
 		scoreExplanation = &search.Explanation{
 			Value:   score,
 			Message: fmt.Sprintf("ConstantScore()"),
@@ -85,7 +85,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 	// if the query weight isn't 1, multiply
 	if s.queryWeight != 1.0 {
 		score = score * s.queryWeight
-		if s.explain {
+		if s.options.Explain {
 			childExplanations := make([]*search.Explanation, 2)
 			childExplanations[0] = s.queryWeightExplanation
 			childExplanations[1] = scoreExplanation
@@ -100,7 +100,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 	rv := ctx.DocumentMatchPool.Get()
 	rv.IndexInternalID = id
 	rv.Score = score
-	if s.explain {
+	if s.options.Explain {
 		rv.Expl = scoreExplanation
 	}
 

vendor/github.com/blevesearch/bleve/search/scorer/scorer_disjunction.go

@@ -21,26 +21,26 @@ import (
 )
 
 type DisjunctionQueryScorer struct {
-	explain bool
+	options search.SearcherOptions
 }
 
-func NewDisjunctionQueryScorer(explain bool) *DisjunctionQueryScorer {
+func NewDisjunctionQueryScorer(options search.SearcherOptions) *DisjunctionQueryScorer {
 	return &DisjunctionQueryScorer{
-		explain: explain,
+		options: options,
 	}
 }
 
 func (s *DisjunctionQueryScorer) Score(ctx *search.SearchContext, constituents []*search.DocumentMatch, countMatch, countTotal int) *search.DocumentMatch {
 	var sum float64
 	var childrenExplanations []*search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations = make([]*search.Explanation, len(constituents))
 	}
 
 	var locations []search.FieldTermLocationMap
 	for i, docMatch := range constituents {
 		sum += docMatch.Score
-		if s.explain {
+		if s.options.Explain {
 			childrenExplanations[i] = docMatch.Expl
 		}
 		if docMatch.Locations != nil {
@@ -49,14 +49,14 @@ func (s *DisjunctionQueryScorer) Score(ctx *search.SearchContext, constituents [
 	}
 
 	var rawExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		rawExpl = &search.Explanation{Value: sum, Message: "sum of:", Children: childrenExplanations}
 	}
 
 	coord := float64(countMatch) / float64(countTotal)
 	newScore := sum * coord
 	var newExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		ce := make([]*search.Explanation, 2)
 		ce[0] = rawExpl
 		ce[1] = &search.Explanation{Value: coord, Message: fmt.Sprintf("coord(%d/%d)", countMatch, countTotal)}

vendor/github.com/blevesearch/bleve/search/scorer/scorer_term.go

@@ -23,20 +23,20 @@ import (
 )
 
 type TermQueryScorer struct {
-	queryTerm              string
+	queryTerm              []byte
 	queryField             string
 	queryBoost             float64
 	docTerm                uint64
 	docTotal               uint64
 	idf                    float64
-	explain                bool
+	options                search.SearcherOptions
 	idfExplanation         *search.Explanation
 	queryNorm              float64
 	queryWeight            float64
 	queryWeightExplanation *search.Explanation
 }
 
-func NewTermQueryScorer(queryTerm string, queryField string, queryBoost float64, docTotal, docTerm uint64, explain bool) *TermQueryScorer {
+func NewTermQueryScorer(queryTerm []byte, queryField string, queryBoost float64, docTotal, docTerm uint64, options search.SearcherOptions) *TermQueryScorer {
 	rv := TermQueryScorer{
 		queryTerm:   queryTerm,
 		queryField:  queryField,
@@ -44,11 +44,11 @@ func NewTermQueryScorer(queryTerm string, queryField string, queryBoost float64,
 		docTerm:     docTerm,
 		docTotal:    docTotal,
 		idf:         1.0 + math.Log(float64(docTotal)/float64(docTerm+1.0)),
-		explain:     explain,
+		options:     options,
 		queryWeight: 1.0,
 	}
 
-	if explain {
+	if options.Explain {
 		rv.idfExplanation = &search.Explanation{
 			Value:   rv.idf,
 			Message: fmt.Sprintf("idf(docFreq=%d, maxDocs=%d)", docTerm, docTotal),
@@ -69,7 +69,7 @@ func (s *TermQueryScorer) SetQueryNorm(qnorm float64) {
 	// update the query weight
 	s.queryWeight = s.queryBoost * s.idf * s.queryNorm
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 3)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   s.queryBoost,
@@ -100,7 +100,7 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	}
 	score := tf * termMatch.Norm * s.idf
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 3)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   tf,
@@ -121,7 +121,7 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	// if the query weight isn't 1, multiply
 	if s.queryWeight != 1.0 {
 		score = score * s.queryWeight
-		if s.explain {
+		if s.options.Explain {
 			childExplanations := make([]*search.Explanation, 2)
 			childExplanations[0] = s.queryWeightExplanation
 			childExplanations[1] = scoreExplanation
@@ -136,44 +136,46 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	rv := ctx.DocumentMatchPool.Get()
 	rv.IndexInternalID = append(rv.IndexInternalID, termMatch.ID...)
 	rv.Score = score
-	if s.explain {
+	if s.options.Explain {
 		rv.Expl = scoreExplanation
 	}
 
 	if termMatch.Vectors != nil && len(termMatch.Vectors) > 0 {
+		locs := make([]search.Location, len(termMatch.Vectors))
+		locsUsed := 0
+
+		totalPositions := 0
+		for _, v := range termMatch.Vectors {
+			totalPositions += len(v.ArrayPositions)
+		}
+		positions := make(search.ArrayPositions, totalPositions)
+		positionsUsed := 0
 
 		rv.Locations = make(search.FieldTermLocationMap)
 		for _, v := range termMatch.Vectors {
 			tlm := rv.Locations[v.Field]
 			if tlm == nil {
 				tlm = make(search.TermLocationMap)
+				rv.Locations[v.Field] = tlm
 			}
 
-			loc := search.Location{
-				Pos:   float64(v.Pos),
-				Start: float64(v.Start),
-				End:   float64(v.End),
-			}
+			loc := &locs[locsUsed]
+			locsUsed++
+
+			loc.Pos = v.Pos
+			loc.Start = v.Start
+			loc.End = v.End
 
 			if len(v.ArrayPositions) > 0 {
-				loc.ArrayPositions = make([]float64, len(v.ArrayPositions))
+				loc.ArrayPositions = positions[positionsUsed : positionsUsed+len(v.ArrayPositions)]
 				for i, ap := range v.ArrayPositions {
-					loc.ArrayPositions[i] = float64(ap)
+					loc.ArrayPositions[i] = ap
 				}
+				positionsUsed += len(v.ArrayPositions)
 			}
 
-			locations := tlm[s.queryTerm]
-			if locations == nil {
-				locations = make(search.Locations, 1)
-				locations[0] = &loc
-			} else {
-				locations = append(locations, &loc)
-			}
-			tlm[s.queryTerm] = locations
-
-			rv.Locations[v.Field] = tlm
+			tlm[string(s.queryTerm)] = append(tlm[string(s.queryTerm)], loc)
 		}
-
 	}
 
 	return rv

vendor/github.com/blevesearch/bleve/search/search.go

@@ -21,27 +21,32 @@ import (
 	"github.com/blevesearch/bleve/index"
 )
 
-type Location struct {
-	Pos            float64   `json:"pos"`
-	Start          float64   `json:"start"`
-	End            float64   `json:"end"`
-	ArrayPositions []float64 `json:"array_positions"`
-}
+type ArrayPositions []uint64
 
-// SameArrayElement returns true if two locations are point to
-// the same array element
-func (l *Location) SameArrayElement(other *Location) bool {
-	if len(l.ArrayPositions) != len(other.ArrayPositions) {
+func (ap ArrayPositions) Equals(other ArrayPositions) bool {
+	if len(ap) != len(other) {
 		return false
 	}
-	for i, elem := range l.ArrayPositions {
-		if other.ArrayPositions[i] != elem {
+	for i := range ap {
+		if ap[i] != other[i] {
 			return false
 		}
 	}
 	return true
 }
 
+type Location struct {
+	// Pos is the position of the term within the field, starting at 1
+	Pos            uint64         `json:"pos"`
+	
+	// Start and End are the byte offsets of the term in the field
+	Start          uint64         `json:"start"`
+	End            uint64         `json:"end"`
+	
+	// ArrayPositions contains the positions of the term within any elements.
+	ArrayPositions ArrayPositions `json:"array_positions"`
+}
+
 type Locations []*Location
 
 type TermLocationMap map[string]Locations
@@ -69,10 +74,6 @@ type DocumentMatch struct {
 	// fields as float64s and date fields as time.RFC3339 formatted strings.
 	Fields map[string]interface{} `json:"fields,omitempty"`
 
-	// as we learn field terms, we can cache important ones for later use
-	// for example, sorting and building facets need these values
-	CachedFieldTerms index.FieldTerms `json:"-"`
-
 	// if we load the document for this hit, remember it so we dont load again
 	Document *document.Document `json:"-"`
 
@@ -138,6 +139,11 @@ type Searcher interface {
 	DocumentMatchPoolSize() int
 }
 
+type SearcherOptions struct {
+	Explain            bool
+	IncludeTermVectors bool
+}
+
 // SearchContext represents the context around a single search
 type SearchContext struct {
 	DocumentMatchPool *DocumentMatchPool

vendor/github.com/blevesearch/bleve/search/searcher/search_boolean.go

@@ -38,14 +38,14 @@ type BooleanSearcher struct {
 	initialized     bool
 }
 
-func NewBooleanSearcher(indexReader index.IndexReader, mustSearcher search.Searcher, shouldSearcher search.Searcher, mustNotSearcher search.Searcher, explain bool) (*BooleanSearcher, error) {
+func NewBooleanSearcher(indexReader index.IndexReader, mustSearcher search.Searcher, shouldSearcher search.Searcher, mustNotSearcher search.Searcher, options search.SearcherOptions) (*BooleanSearcher, error) {
 	// build our searcher
 	rv := BooleanSearcher{
 		indexReader:     indexReader,
 		mustSearcher:    mustSearcher,
 		shouldSearcher:  shouldSearcher,
 		mustNotSearcher: mustNotSearcher,
-		scorer:          scorer.NewConjunctionQueryScorer(explain),
+		scorer:          scorer.NewConjunctionQueryScorer(options),
 		matches:         make([]*search.DocumentMatch, 2),
 	}
 	rv.computeQueryNorm()

vendor/github.com/blevesearch/bleve/search/searcher/search_conjunction.go

@@ -31,10 +31,10 @@ type ConjunctionSearcher struct {
 	maxIDIdx    int
 	scorer      *scorer.ConjunctionQueryScorer
 	initialized bool
-	explain     bool
+	options     search.SearcherOptions
 }
 
-func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, explain bool) (*ConjunctionSearcher, error) {
+func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, options search.SearcherOptions) (*ConjunctionSearcher, error) {
 	// build the downstream searchers
 	searchers := make(OrderedSearcherList, len(qsearchers))
 	for i, searcher := range qsearchers {
@@ -45,10 +45,10 @@ func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.S
 	// build our searcher
 	rv := ConjunctionSearcher{
 		indexReader: indexReader,
-		explain:     explain,
+		options:     options,
 		searchers:   searchers,
 		currs:       make([]*search.DocumentMatch, len(searchers)),
-		scorer:      scorer.NewConjunctionQueryScorer(explain),
+		scorer:      scorer.NewConjunctionQueryScorer(options),
 	}
 	rv.computeQueryNorm()
 	return &rv, nil

vendor/github.com/blevesearch/bleve/search/searcher/search_disjunction.go

@@ -50,11 +50,22 @@ func tooManyClauses(count int) bool {
 }
 
 func tooManyClausesErr() error {
-	return fmt.Errorf("TooManyClauses[maxClauseCount is set to %d]", DisjunctionMaxClauseCount)
+	return fmt.Errorf("TooManyClauses[maxClauseCount is set to %d]",
+		DisjunctionMaxClauseCount)
 }
 
-func NewDisjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, min float64, explain bool) (*DisjunctionSearcher, error) {
-	if tooManyClauses(len(qsearchers)) {
+func NewDisjunctionSearcher(indexReader index.IndexReader,
+	qsearchers []search.Searcher, min float64, options search.SearcherOptions) (
+	*DisjunctionSearcher, error) {
+	return newDisjunctionSearcher(indexReader, qsearchers, min, options,
+		true)
+}
+
+func newDisjunctionSearcher(indexReader index.IndexReader,
+	qsearchers []search.Searcher, min float64, options search.SearcherOptions,
+	limit bool) (
+	*DisjunctionSearcher, error) {
+	if limit && tooManyClauses(len(qsearchers)) {
 		return nil, tooManyClausesErr()
 	}
 	// build the downstream searchers
@@ -70,7 +81,7 @@ func NewDisjunctionSearcher(indexReader index.IndexReader, qsearchers []search.S
 		searchers:    searchers,
 		numSearchers: len(searchers),
 		currs:        make([]*search.DocumentMatch, len(searchers)),
-		scorer:       scorer.NewDisjunctionQueryScorer(explain),
+		scorer:       scorer.NewDisjunctionQueryScorer(options),
 		min:          int(min),
 		matching:     make([]*search.DocumentMatch, len(searchers)),
 		matchingIdxs: make([]int, len(searchers)),
@@ -161,7 +172,8 @@ func (s *DisjunctionSearcher) SetQueryNorm(qnorm float64) {
 	}
 }
 
-func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
+func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (
+	*search.DocumentMatch, error) {
 	if !s.initialized {
 		err := s.initSearchers(ctx)
 		if err != nil {
@@ -199,7 +211,8 @@ func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (*search.DocumentM
 	return rv, nil
 }
 
-func (s *DisjunctionSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
+func (s *DisjunctionSearcher) Advance(ctx *search.SearchContext,
+	ID index.IndexInternalID) (*search.DocumentMatch, error) {
 	if !s.initialized {
 		err := s.initSearchers(ctx)
 		if err != nil {

vendor/github.com/blevesearch/bleve/search/searcher/search_docid.go

@@ -28,13 +28,13 @@ type DocIDSearcher struct {
 }
 
 func NewDocIDSearcher(indexReader index.IndexReader, ids []string, boost float64,
-	explain bool) (searcher *DocIDSearcher, err error) {
+	options search.SearcherOptions) (searcher *DocIDSearcher, err error) {
 
 	reader, err := indexReader.DocIDReaderOnly(ids)
 	if err != nil {
 		return nil, err
 	}
-	scorer := scorer.NewConstantScorer(1.0, boost, explain)
+	scorer := scorer.NewConstantScorer(1.0, boost, options)
 	return &DocIDSearcher{
 		scorer: scorer,
 		reader: reader,

vendor/github.com/blevesearch/bleve/search/searcher/search_filter.go

@@ -0,0 +1,88 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package searcher
+
+import (
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/search"
+)
+
+// FilterFunc defines a function which can filter documents
+// returning true means keep the document
+// returning false means do not keep the document
+type FilterFunc func(d *search.DocumentMatch) bool
+
+// FilteringSearcher wraps any other searcher, but checks any Next/Advance
+// call against the supplied FilterFunc
+type FilteringSearcher struct {
+	child  search.Searcher
+	accept FilterFunc
+}
+
+func NewFilteringSearcher(s search.Searcher, filter FilterFunc) *FilteringSearcher {
+	return &FilteringSearcher{
+		child:  s,
+		accept: filter,
+	}
+}
+
+func (f *FilteringSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
+	next, err := f.child.Next(ctx)
+	for next != nil && err == nil {
+		if f.accept(next) {
+			return next, nil
+		}
+		next, err = f.child.Next(ctx)
+	}
+	return nil, err
+}
+
+func (f *FilteringSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
+	adv, err := f.child.Advance(ctx, ID)
+	if err != nil {
+		return nil, err
+	}
+	if adv == nil {
+		return nil, nil
+	}
+	if f.accept(adv) {
+		return adv, nil
+	}
+	return f.Next(ctx)
+}
+
+func (f *FilteringSearcher) Close() error {
+	return f.child.Close()
+}
+
+func (f *FilteringSearcher) Weight() float64 {
+	return f.child.Weight()
+}
+
+func (f *FilteringSearcher) SetQueryNorm(n float64) {
+	f.child.SetQueryNorm(n)
+}
+
+func (f *FilteringSearcher) Count() uint64 {
+	return f.child.Count()
+}
+
+func (f *FilteringSearcher) Min() int {
+	return f.child.Min()
+}
+
+func (f *FilteringSearcher) DocumentMatchPoolSize() int {
+	return f.child.DocumentMatchPoolSize()
+}

vendor/github.com/blevesearch/bleve/search/searcher/search_fuzzy.go

@@ -19,17 +19,9 @@ import (
 	"github.com/blevesearch/bleve/search"
 )
 
-type FuzzySearcher struct {
-	indexReader index.IndexReader
-	term        string
-	prefix      int
-	fuzziness   int
-	field       string
-	explain     bool
-	searcher    *DisjunctionSearcher
-}
-
-func NewFuzzySearcher(indexReader index.IndexReader, term string, prefix, fuzziness int, field string, boost float64, explain bool) (*FuzzySearcher, error) {
+func NewFuzzySearcher(indexReader index.IndexReader, term string,
+	prefix, fuzziness int, field string, boost float64,
+	options search.SearcherOptions) (search.Searcher, error) {
 	// Note: we don't byte slice the term for a prefix because of runes.
 	prefixTerm := ""
 	for i, r := range term {
@@ -40,46 +32,18 @@ func NewFuzzySearcher(indexReader index.IndexReader, term string, prefix, fuzzin
 		}
 	}
 
-	candidateTerms, err := findFuzzyCandidateTerms(indexReader, term, fuzziness, field, prefixTerm)
-	if err != nil {
-		return nil, err
-	}
-
-	// enumerate all the terms in the range
-	qsearchers := make([]search.Searcher, 0, len(candidateTerms))
-	qsearchersClose := func() {
-		for _, searcher := range qsearchers {
-			_ = searcher.Close()
-		}
-	}
-	for _, cterm := range candidateTerms {
-		qsearcher, err := NewTermSearcher(indexReader, cterm, field, boost, explain)
-		if err != nil {
-			qsearchersClose()
-			return nil, err
-		}
-		qsearchers = append(qsearchers, qsearcher)
-	}
-
-	// build disjunction searcher of these ranges
-	searcher, err := NewDisjunctionSearcher(indexReader, qsearchers, 0, explain)
+	candidateTerms, err := findFuzzyCandidateTerms(indexReader, term, fuzziness,
+		field, prefixTerm)
 	if err != nil {
-		qsearchersClose()
 		return nil, err
 	}
 
-	return &FuzzySearcher{
-		indexReader: indexReader,
-		term:        term,
-		prefix:      prefix,
-		fuzziness:   fuzziness,
-		field:       field,
-		explain:     explain,
-		searcher:    searcher,
-	}, nil
+	return NewMultiTermSearcher(indexReader, candidateTerms, field,
+		boost, options, true)
 }
 
-func findFuzzyCandidateTerms(indexReader index.IndexReader, term string, fuzziness int, field, prefixTerm string) (rv []string, err error) {
+func findFuzzyCandidateTerms(indexReader index.IndexReader, term string,
+	fuzziness int, field, prefixTerm string) (rv []string, err error) {
 	rv = make([]string, 0)
 	var fieldDict index.FieldDict
 	if len(prefixTerm) > 0 {
@@ -108,36 +72,3 @@ func findFuzzyCandidateTerms(indexReader index.IndexReader, term string, fuzzine
 
 	return rv, err
 }
-
-func (s *FuzzySearcher) Count() uint64 {
-	return s.searcher.Count()
-}
-
-func (s *FuzzySearcher) Weight() float64 {
-	return s.searcher.Weight()
-}
-
-func (s *FuzzySearcher) SetQueryNorm(qnorm float64) {
-	s.searcher.SetQueryNorm(qnorm)
-}
-
-func (s *FuzzySearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
-	return s.searcher.Next(ctx)
-
-}
-
-func (s *FuzzySearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
-	return s.searcher.Advance(ctx, ID)
-}
-
-func (s *FuzzySearcher) Close() error {
-	return s.searcher.Close()
-}
-
-func (s *FuzzySearcher) Min() int {
-	return 0
-}
-
-func (s *FuzzySearcher) DocumentMatchPoolSize() int {
-	return s.searcher.DocumentMatchPoolSize()
-}

vendor/github.com/blevesearch/bleve/search/searcher/search_geoboundingbox.go

@@ -0,0 +1,173 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package searcher
+
+import (
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/numeric"
+	"github.com/blevesearch/bleve/search"
+)
+
+func NewGeoBoundingBoxSearcher(indexReader index.IndexReader, minLon, minLat,
+	maxLon, maxLat float64, field string, boost float64,
+	options search.SearcherOptions, checkBoundaries bool) (
+	search.Searcher, error) {
+
+	// track list of opened searchers, for cleanup on early exit
+	var openedSearchers []search.Searcher
+	cleanupOpenedSearchers := func() {
+		for _, s := range openedSearchers {
+			_ = s.Close()
+		}
+	}
+
+	// do math to produce list of terms needed for this search
+	onBoundaryTerms, notOnBoundaryTerms := ComputeGeoRange(0, (geo.GeoBits<<1)-1,
+		minLon, minLat, maxLon, maxLat, checkBoundaries)
+
+	var onBoundarySearcher search.Searcher
+	if len(onBoundaryTerms) > 0 {
+		rawOnBoundarySearcher, err := NewMultiTermSearcherBytes(indexReader,
+			onBoundaryTerms, field, boost, options, false)
+		if err != nil {
+			return nil, err
+		}
+		// add filter to check points near the boundary
+		onBoundarySearcher = NewFilteringSearcher(rawOnBoundarySearcher,
+			buildRectFilter(indexReader, field, minLon, minLat, maxLon, maxLat))
+		openedSearchers = append(openedSearchers, onBoundarySearcher)
+	}
+
+	var notOnBoundarySearcher search.Searcher
+	if len(notOnBoundaryTerms) > 0 {
+		var err error
+		notOnBoundarySearcher, err = NewMultiTermSearcherBytes(indexReader,
+			notOnBoundaryTerms, field, boost, options, false)
+		if err != nil {
+			cleanupOpenedSearchers()
+			return nil, err
+		}
+		openedSearchers = append(openedSearchers, notOnBoundarySearcher)
+	}
+
+	if onBoundarySearcher != nil && notOnBoundarySearcher != nil {
+		rv, err := NewDisjunctionSearcher(indexReader,
+			[]search.Searcher{
+				onBoundarySearcher,
+				notOnBoundarySearcher,
+			},
+			0, options)
+		if err != nil {
+			cleanupOpenedSearchers()
+			return nil, err
+		}
+		return rv, nil
+	} else if onBoundarySearcher != nil {
+		return onBoundarySearcher, nil
+	} else if notOnBoundarySearcher != nil {
+		return notOnBoundarySearcher, nil
+	}
+
+	return NewMatchNoneSearcher(indexReader)
+}
+
+var geoMaxShift = document.GeoPrecisionStep * 4
+var geoDetailLevel = ((geo.GeoBits << 1) - geoMaxShift) / 2
+
+func ComputeGeoRange(term uint64, shift uint,
+	sminLon, sminLat, smaxLon, smaxLat float64,
+	checkBoundaries bool) (
+	onBoundary [][]byte, notOnBoundary [][]byte) {
+	split := term | uint64(0x1)<<shift
+	var upperMax uint64
+	if shift < 63 {
+		upperMax = term | ((uint64(1) << (shift + 1)) - 1)
+	} else {
+		upperMax = 0xffffffffffffffff
+	}
+	lowerMax := split - 1
+	onBoundary, notOnBoundary = relateAndRecurse(term, lowerMax, shift,
+		sminLon, sminLat, smaxLon, smaxLat, checkBoundaries)
+	plusOnBoundary, plusNotOnBoundary := relateAndRecurse(split, upperMax, shift,
+		sminLon, sminLat, smaxLon, smaxLat, checkBoundaries)
+	onBoundary = append(onBoundary, plusOnBoundary...)
+	notOnBoundary = append(notOnBoundary, plusNotOnBoundary...)
+	return
+}
+
+func relateAndRecurse(start, end uint64, res uint,
+	sminLon, sminLat, smaxLon, smaxLat float64,
+	checkBoundaries bool) (
+	onBoundary [][]byte, notOnBoundary [][]byte) {
+	minLon := geo.MortonUnhashLon(start)
+	minLat := geo.MortonUnhashLat(start)
+	maxLon := geo.MortonUnhashLon(end)
+	maxLat := geo.MortonUnhashLat(end)
+
+	level := ((geo.GeoBits << 1) - res) >> 1
+
+	within := res%document.GeoPrecisionStep == 0 &&
+		geo.RectWithin(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat)
+	if within || (level == geoDetailLevel &&
+		geo.RectIntersects(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat)) {
+		if !within && checkBoundaries {
+			return [][]byte{
+				numeric.MustNewPrefixCodedInt64(int64(start), res),
+			}, nil
+		}
+		return nil,
+			[][]byte{
+				numeric.MustNewPrefixCodedInt64(int64(start), res),
+			}
+	} else if level < geoDetailLevel &&
+		geo.RectIntersects(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat) {
+		return ComputeGeoRange(start, res-1, sminLon, sminLat, smaxLon, smaxLat,
+			checkBoundaries)
+	}
+	return nil, nil
+}
+
+func buildRectFilter(indexReader index.IndexReader, field string,
+	minLon, minLat, maxLon, maxLat float64) FilterFunc {
+	return func(d *search.DocumentMatch) bool {
+		var lon, lat float64
+		var found bool
+		err := indexReader.DocumentVisitFieldTerms(d.IndexInternalID,
+			[]string{field}, func(field string, term []byte) {
+				// only consider the values which are shifted 0
+				prefixCoded := numeric.PrefixCoded(term)
+				shift, err := prefixCoded.Shift()
+				if err == nil && shift == 0 {
+					var i64 int64
+					i64, err = prefixCoded.Int64()
+					if err == nil {
+						lon = geo.MortonUnhashLon(uint64(i64))
+						lat = geo.MortonUnhashLat(uint64(i64))
+						found = true
+					}
+				}
+			})
+		if err == nil && found {
+			return geo.BoundingBoxContains(lon, lat,
+				minLon, minLat, maxLon, maxLat)
+		}
+		return false
+	}
+}