diff --git a/src/main/org/apache/tools/ant/taskdefs/SQLExec.java b/src/main/org/apache/tools/ant/taskdefs/SQLExec.java
index 5bc4c5047..a33d2e1ea 100644
--- a/src/main/org/apache/tools/ant/taskdefs/SQLExec.java
+++ b/src/main/org/apache/tools/ant/taskdefs/SQLExec.java
@@ -25,6 +25,7 @@ import org.apache.tools.ant.types.EnumeratedAttribute;
 import org.apache.tools.ant.types.FileSet;
 import org.apache.tools.ant.types.Resource;
 import org.apache.tools.ant.types.ResourceCollection;
+import org.apache.tools.ant.types.resources.Appendable;
 import org.apache.tools.ant.types.resources.FileProvider;
 import org.apache.tools.ant.types.resources.FileResource;
 import org.apache.tools.ant.types.resources.Union;
@@ -569,16 +570,26 @@ public class SQLExec extends JDBCTask {
                 try {
                     if (output != null) {
                         log("Opening PrintStream to output Resource " + output, Project.MSG_VERBOSE);
-                        OutputStream os;
+                        OutputStream os = null;
                         FileProvider fp =
                             (FileProvider) output.as(FileProvider.class);
                         if (fp != null) {
                             os = new FileOutputStream(fp.getFile(), append);
                         } else {
-                            // TODO use Appendable
-                            os = output.getOutputStream();
                             if (append) {
-                                log("Ignoring append=true for non-file resource " + output, Project.MSG_WARN);
+                                Appendable a =
+                                    (Appendable) output.as(Appendable.class);
+                                if (a != null) {
+                                    os = a.getAppendOutputStream();
+                                }
+                            }
+                            if (os == null) {
+                                os = output.getOutputStream();
+                                if (append) {
+                                    log("Ignoring append=true for non-appendable"
+                                        + " resource " + output,
+                                        Project.MSG_WARN);
+                                }
                             }
                         }
                         out = new PrintStream(new BufferedOutputStream(os));
diff --git a/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java b/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java
index 61591df28..001ac7c8c 100644
--- a/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java
+++ b/src/main/org/apache/tools/ant/types/resources/ContentTransformingResource.java
@@ -251,6 +251,32 @@ public abstract class ContentTransformingResource extends Resource {
         super.setRefid(r);
     }
 
+    /**
+     * Suppress FileProvider, re-implement Appendable
+     */
+    public Object as(Class clazz) {
+        if (Appendable.class.isAssignableFrom(clazz)) {
+            final Appendable a =
+                (Appendable) getResource().as(Appendable.class);
+            if (a != null) {
+                return new Appendable() {
+                    public OutputStream getAppendOutputStream()
+                        throws IOException {
+                        OutputStream out = a.getAppendOutputStream();
+                        if (out != null) {
+                            out = wrapStream(out);
+                        }
+                        return out;
+                    }
+                };
+            }
+            return null;
+        }
+
+        return FileProvider.class.isAssignableFrom(clazz) 
+            ? null : getResource().as(clazz);
+    }
+
     /**
      * Is supposed to wrap the stream.
      *
diff --git a/src/main/org/apache/tools/ant/types/resources/MappedResource.java b/src/main/org/apache/tools/ant/types/resources/MappedResource.java
index b153e2b23..9bf2d1e69 100644
--- a/src/main/org/apache/tools/ant/types/resources/MappedResource.java
+++ b/src/main/org/apache/tools/ant/types/resources/MappedResource.java
@@ -159,6 +159,9 @@ public class MappedResource extends Resource {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * Suppress FileProvider
+     */
     public Object as(Class clazz) {
         return FileProvider.class.isAssignableFrom(clazz) 
             ? null : wrapped.as(clazz);