svn commit: r1588702 - /jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java

[andy]

Author: andy
Date: Sat Apr 19 20:10:59 2014
New Revision: 1588702

URL: http://svn.apache.org/r1588702
Log:
JENA-685 : Don't try to reorder pattern of 0 or 1 triple patterns

Modified:
    
jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java

Modified: 
jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java
URL: 
http://svn.apache.org/viewvc/jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java?rev=1588702&r1=1588701&r2=1588702&view=diff
==============================================================================
--- 
jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java
 (original)
+++ 
jena/trunk/jena-arq/src/main/java/com/hp/hpl/jena/sparql/algebra/optimize/TransformReorder.java
 Sat Apr 19 20:10:59 2014
@@ -60,7 +60,9 @@ public class TransformReorder extends Tr
        @Override
        public Op transform(OpBGP opBGP) {
                BasicPattern pattern = opBGP.getPattern();
-               BasicPattern pattern2 = this.reorder.reorder(pattern);
+               if ( pattern.size() < 2 ) 
+                   return opBGP ; 
+               BasicPattern pattern2 = reorder.reorder(pattern);
                return new OpBGP(pattern2);
        }
 
@@ -70,7 +72,9 @@ public class TransformReorder extends Tr
        @Override
        public Op transform(OpQuadPattern opQuadPattern) {
                BasicPattern pattern = opQuadPattern.getBasicPattern();
-               BasicPattern pattern2 = this.reorder.reorder(pattern);
+        if ( pattern.size() < 2 ) 
+            return opQuadPattern ; 
+               BasicPattern pattern2 = reorder.reorder(pattern);
                return new OpQuadPattern(opQuadPattern.getGraphNode(), 
pattern2);
        }