Merge pull request apache#527 from grahamtriggs/feature/sdbtransform

JENA-1664: SDB Transform - improve performance of OPTIONAL, MINUS

Author: afs

jena-sdb/src/main/java/org/apache/jena/sdb/SDB.java

@@ -68,6 +68,8 @@ public class SDB
     // See also SDBConstants.jdbcFetchSizeOff
 
     public static final Symbol annotateGeneratedSQL     = SDBConstants.allocSymbol("annotateGeneratedSQL") ;
+
+    public static final Symbol optimizeSubqueryFragments = SDBConstants.allocSymbol("optimizeSubqueryFragments") ;
     // ----------------------------------
 
     // Global context is the ARQ context.