svn commit: r1467234 - /jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java

[an...@apache.org]

Author: andy
Date: Fri Apr 12 10:47:31 2013
New Revision: 1467234

URL: http://svn.apache.org/r1467234
Log:
Towards a test case for JENA-432

Added:
    jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java

Added: jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java
URL: http://svn.apache.org/viewvc/jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java?rev=1467234&view=auto
==============================================================================
--- jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java (added)
+++ jena/Scratch/AFS/Jena-Dev/trunk/src/dev/Jena432_SubQueryRewrites.java Fri Apr 12 10:47:31 2013
@@ -0,0 +1,82 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 dev;
+
+import java.util.Set ;
+
+import org.apache.jena.atlas.lib.StrUtils ;
+
+import com.hp.hpl.jena.query.Query ;
+import com.hp.hpl.jena.query.QueryFactory ;
+import com.hp.hpl.jena.sparql.algebra.Algebra ;
+import com.hp.hpl.jena.sparql.algebra.Op ;
+import com.hp.hpl.jena.sparql.algebra.OpVars ;
+import com.hp.hpl.jena.sparql.core.Var ;
+import com.hp.hpl.jena.sparql.sse.SSE ;
+
+public class Jena432_SubQueryRewrites
+{
+    public static void main(String... args) throws Exception
+    {
+        if ( false )
+        {
+            Op op = SSE.parseOp("(leftjoin (bgp (?s1 ?p1 ?o1)) (project (?s2) (bgp (?s2 ?p2 ?o2))))") ;
+            System.out.println(op) ;
+            Set<Var> vars = OpVars.patternVars(op) ;
+            System.out.println(vars) ;
+            System.exit(0) ;
+        }
+        String qs1 = StrUtils.strjoinNL
+            ( "SELECT *",
+              "WHERE {",
+              "  ?test ?p1 ?o1.",
+              //"  FILTER ( ?test = <http://localhost/t1> || ?test = <http://localhost/t2> )",
+              //"  FILTER ( ?test = <http://localhost/t1> )",
+              "  OPTIONAL {",
+              "    SELECT ?s1", // Not ?test
+              "    { ?s1 ?p2 ?o2 }", //" GROUP BY ?s1",
+              "  }" ,
+              "}" ) ;
+        
+        // No (conditional) optimization. 
+        String qs2 = StrUtils.strjoinNL
+            ( "SELECT *",
+              "WHERE {",
+              "  ?test ?p1 ?o1.",
+              "  OPTIONAL {",
+              "    SELECT ?s1",   
+              "    { ?s1 ?p2 ?o2 }", //" GROUP BY ?s1",
+              "  }" ,
+              "}" ) ;
+
+        String qs = qs2 ;
+        Query query = QueryFactory.create(qs) ;
+        Op op = Algebra.compile(query) ;
+        System.out.println(query) ;
+        System.out.println(op) ;
+//        Op op1 = Transformer.transform(new TransformFilterDisjunction(), op) ;
+//        Op op1 = Transformer.transform(new TransformFilterEquality(), op) ;
+
+        //Op opX = SSE.parseOp("") ;
+        Op op1 = Algebra.optimize(op) ;
+        System.out.println(op1) ;
+    } 
+
+}
+