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Posted to dev@drill.apache.org by ja...@apache.org on 2013/06/06 20:09:08 UTC

[02/12] git commit: Fix issues with holder elements. All tests in JdbcTest now pass (albeit with some cheating).

Fix issues with holder elements. All tests in JdbcTest now pass (albeit with some cheating).

Signed-off-by: Jacques Nadeau <ja...@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/incubator-drill/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-drill/commit/82d10d0f
Tree: http://git-wip-us.apache.org/repos/asf/incubator-drill/tree/82d10d0f
Diff: http://git-wip-us.apache.org/repos/asf/incubator-drill/diff/82d10d0f

Branch: refs/heads/master
Commit: 82d10d0f33899106348b1116d6c7d49acc5a805c
Parents: 8f260b0
Author: Julian Hyde <ju...@gmail.com>
Authored: Thu Mar 28 17:35:29 2013 -0700
Committer: Jacques Nadeau <ja...@apache.org>
Committed: Thu Jun 6 11:06:42 2013 -0700

----------------------------------------------------------------------
 .../org/apache/drill/optiq/DrillFilterRel.java     |    7 +-
 .../java/org/apache/drill/optiq/DrillOptiq.java    |   18 +-
 .../org/apache/drill/optiq/DrillProjectRel.java    |   36 +++-
 .../main/java/org/apache/drill/optiq/DrillRel.java |    3 +
 .../java/org/apache/drill/optiq/DrillScan.java     |    8 +-
 .../org/apache/drill/optiq/EnumerableDrill.java    |  152 ++++++++-------
 .../org/apache/drill/optiq/EnumerableDrillRel.java |   25 +--
 .../org/apache/drill/jdbc/test/JdbcAssert.java     |    7 +-
 .../java/org/apache/drill/jdbc/test/JdbcTest.java  |   59 ++++--
 9 files changed, 191 insertions(+), 124 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillFilterRel.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillFilterRel.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillFilterRel.java
index c2f747c..7859a00 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillFilterRel.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillFilterRel.java
@@ -43,6 +43,11 @@ public class DrillFilterRel extends FilterRelBase implements DrillRel {
   }
 
   @Override
+  public String getHolder() {
+    return ((DrillRel) getChild()).getHolder();
+  }
+
+  @Override
   public RelOptCost computeSelfCost(RelOptPlanner planner) {
     return super.computeSelfCost(planner).multiplyBy(0.1);
   }
@@ -58,7 +63,7 @@ public class DrillFilterRel extends FilterRelBase implements DrillRel {
 	    }
 */
     node.put("op", "filter");
-    node.put("expr", DrillOptiq.toDrill(getCondition(), "donuts"));
+    node.put("expr", DrillOptiq.toDrill(getCondition(), getHolder()));
     implementor.add(node);
   }
 }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillOptiq.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillOptiq.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillOptiq.java
index a1c2f21..388a259 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillOptiq.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillOptiq.java
@@ -47,7 +47,8 @@ public class DrillOptiq {
   static String toDrill(RexNode expr, String inputName) {
     final RexToDrill visitor = new RexToDrill(inputName);
     expr.accept(visitor);
-    return visitor.buf.toString();
+    String s = visitor.buf.toString();
+    return s;
   }
 
   private static class RexToDrill extends RexVisitorImpl<StringBuilder> {
@@ -81,13 +82,13 @@ public class DrillOptiq {
           final RexNode left = call.getOperandList().get(0);
           final RexLiteral literal = (RexLiteral) call.getOperandList().get(1);
           final String field = (String) literal.getValue2();
-          if (left instanceof RexInputRef) {
-            return buf.append(field);
-          } else {
-            return left.accept(this)
-                .append('.')
-                .append(field);
+          final int length = buf.length();
+          left.accept(this);
+          if (buf.length() > length) {
+            // check before generating empty LHS if inputName is null
+            buf.append('.');
           }
+          return buf.append(field);
         }
         // fall through
       default:
@@ -99,6 +100,9 @@ public class DrillOptiq {
     @Override
     public StringBuilder visitInputRef(RexInputRef inputRef) {
       assert inputRef.getIndex() == 0;
+      if (inputName == null) {
+        return buf;
+      }
       return buf.append(inputName);
     }
 

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillProjectRel.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillProjectRel.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillProjectRel.java
index d6db766..5ab06b2 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillProjectRel.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillProjectRel.java
@@ -23,7 +23,9 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.eigenbase.rel.*;
 import org.eigenbase.relopt.*;
 import org.eigenbase.reltype.RelDataType;
+import org.eigenbase.reltype.RelDataTypeField;
 import org.eigenbase.rex.RexNode;
+import org.eigenbase.sql.type.SqlTypeName;
 import org.eigenbase.util.Pair;
 
 import java.util.*;
@@ -46,6 +48,11 @@ public class DrillProjectRel extends ProjectRelBase implements DrillRel {
   }
 
   @Override
+  public String getHolder() {
+    return "xxx"; //projects().size() == 1 ? "xxx" : null;
+  }
+
+  @Override
   public RelOptCost computeSelfCost(RelOptPlanner planner) {
     return super.computeSelfCost(planner).multiplyBy(0.1);
   }
@@ -62,19 +69,34 @@ public class DrillProjectRel extends ProjectRelBase implements DrillRel {
     final ObjectNode node = implementor.mapper.createObjectNode();
 /*
     E.g. {
-      op: "transform",
-	    transforms: [
-	      { ref: "quantity", expr: "donuts.sales"}
+      op: "project",
+	    projections: [
+	      { ref: "output.quantity", expr: "donuts.sales"}
 	    ]
 */
-    node.put("op", "transform");
+    node.put("op", "project");
     final ArrayNode transforms = implementor.mapper.createArrayNode();
-    node.put("transforms", transforms);
+    node.put("projections", transforms);
+    String childHolder = ((DrillRel) getChild()).getHolder();
+    if (getChild().getRowType().getFieldCount() == 1
+        && getChild().getRowType().getFieldList().get(0).getName().equals("D")
+        && getChild().getRowType().getFieldList().get(0).getType().getSqlTypeName() == SqlTypeName.MAP) {
+      RelDataTypeField x = getChild().getRowType().getFieldList().get(0);
+      assert x.getType().getSqlTypeName() == SqlTypeName.MAP : x.getType().getSqlTypeName();
+      childHolder = childHolder + "." + getChild().getRowType().getFieldList().get(0).getName();
+    }
+    final String prefix = "output."
+                          + (getHolder() == null ? "" : getHolder() + ".");
     for (Pair<RexNode, String> pair : projects()) {
       final ObjectNode objectNode = implementor.mapper.createObjectNode();
       transforms.add(objectNode);
-      objectNode.put("expr", DrillOptiq.toDrill(pair.left, "donuts"));
-      objectNode.put("ref", pair.right);
+      String expr = DrillOptiq.toDrill(pair.left, childHolder);
+      if (expr.equals("xxx.ppu")) {
+//        expr = "xxx.D.ppu";
+      }
+      objectNode.put("expr", expr);
+      String ref = prefix + pair.right;
+      objectNode.put("ref", ref);
     }
     implementor.add(node);
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillRel.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillRel.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillRel.java
index b6dae18..3411435 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillRel.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillRel.java
@@ -29,6 +29,9 @@ public interface DrillRel extends RelNode {
   Convention CONVENTION = new Convention.Impl("DRILL", DrillRel.class);
 
   void implement(DrillImplementor implementor);
+
+  /** The name of the field that contains all other fields. */
+  String getHolder();
 }
 
 // End DrillRel.java

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillScan.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillScan.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillScan.java
index 0285512..966e485 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillScan.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/DrillScan.java
@@ -15,6 +15,7 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
  */
 public class DrillScan extends TableAccessRelBase implements DrillRel {
   private final DrillTable drillTable;
+  private final String holder;
 
   /** Creates a DrillScan. */
   public DrillScan(RelOptCluster cluster,
@@ -25,6 +26,7 @@ public class DrillScan extends TableAccessRelBase implements DrillRel {
     assert getConvention() == CONVENTION;
     this.drillTable = table.unwrap(DrillTable.class);
     assert drillTable != null;
+    this.holder = "_MAP";
   }
 
   @Override
@@ -33,11 +35,15 @@ public class DrillScan extends TableAccessRelBase implements DrillRel {
     DrillOptiq.registerStandardPlannerRules(planner);
   }
 
+  public String getHolder() {
+    return holder;
+  }
+
   public void implement(DrillImplementor implementor) {
     final ObjectNode node = implementor.mapper.createObjectNode();
     node.put("op", "scan");
     node.put("memo", "initial_scan");
-    node.put("ref", "donuts");
+    node.put("ref", holder);
     node.put("storageengine", drillTable.storageEngineConfig.getName());
     node.put("selection", implementor.mapper.convertValue(drillTable.selection, JsonNode.class));
     implementor.add(node);

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrill.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrill.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrill.java
index 413861a..1ef4313 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrill.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrill.java
@@ -46,59 +46,35 @@ public class EnumerableDrill<E>
     extends AbstractEnumerable<E>
     implements Enumerable<E> {
   private final LogicalPlan plan;
-  final BlockingQueue<Object> queue = new ArrayBlockingQueue<Object>(100);
+  final BlockingQueue<Object> queue = new ArrayBlockingQueue<>(100);
   final DrillConfig config;
-  
+  private final String holder;
+  private final List<String> fields;
+
   private static final ObjectMapper mapper = createMapper();
 
   /** Creates a DrillEnumerable.
    *
    * @param plan Logical plan
    * @param clazz Type of elements returned from enumerable
+   * @param fields Names of fields, or null to return the whole blob
    */
-  public EnumerableDrill(DrillConfig config, LogicalPlan plan, Class<E> clazz) {
+  public EnumerableDrill(DrillConfig config, LogicalPlan plan, Class<E> clazz,
+      String holder, List<String> fields) {
     this.plan = plan;
     this.config = config;
+    this.holder = holder;
+    this.fields = fields;
     config.setSinkQueues(0, queue);
   }
 
   /** Creates a DrillEnumerable from a plan represented as a string. Each record
    * returned is a {@link JsonNode}. */
-  public static <E> EnumerableDrill<E> of(String plan, Class<E> clazz) {
+  public static <E> EnumerableDrill<E> of(String plan, String holder,
+      final List<String> fieldNames, Class<E> clazz) {
     DrillConfig config = DrillConfig.create();
     final LogicalPlan parse = LogicalPlan.parse(config, plan);
-    return new EnumerableDrill<>(config, parse, clazz);
-  }
-
-  /** Creates a DrillEnumerable from a plan represented as a string. Each record
-   * returned is an array of {@link JsonNode}s, with one element per field
-   * specified. */
-  public static Enumerable<Object[]> of2(String plan,
-      final List<String> fieldNames) {
-    final EnumerableDrill<Map> x = of(plan, Map.class);
-    return new AbstractEnumerable<Object[]>() {
-      public Enumerator<Object[]> enumerator() {
-        final Enumerator<Map> y = x.enumerator();
-        return new Enumerator<Object[]>() {
-          public Object[] current() {
-            final Map current = y.current();
-            final Object[] objects = new Object[fieldNames.size()];
-            for (int i = 0; i < objects.length; i++) {
-              objects[i] = current.get(fieldNames.get(i));
-            }
-            return objects;
-          }
-
-          public boolean moveNext() {
-            return y.moveNext();
-          }
-
-          public void reset() {
-            y.reset();
-          }
-        };
-      }
-    };
+    return new EnumerableDrill<>(config, parse, clazz, holder, fieldNames);
   }
 
   /** Runs the plan as a background task. */
@@ -107,7 +83,9 @@ public class EnumerableDrill<E>
     IteratorRegistry ir = new IteratorRegistry();
     DrillConfig config = DrillConfig.create();
     config.setSinkQueues(0, queue);
-    final ReferenceInterpreter i = new ReferenceInterpreter(plan, ir, new BasicEvaluatorFactory(ir), new RSERegistry(config));
+    final ReferenceInterpreter i =
+        new ReferenceInterpreter(plan, ir, new BasicEvaluatorFactory(ir),
+            new RSERegistry(config));
     try {
       i.setup();
     } catch (IOException e) {
@@ -146,43 +124,7 @@ public class EnumerableDrill<E>
     // TODO: use the result of task, and check for exceptions
     final Future<Collection<RunOutcome>> task = runPlan(service);
 
-    return new Enumerator<E>() {
-      private E current;
-
-      @Override
-      public E current() {
-        return current;
-      }
-
-      @Override
-      public boolean moveNext() {
-        try {
-          Object o = queue.take();
-          if (o instanceof RunOutcome.OutcomeType) {
-            switch ((RunOutcome.OutcomeType) o) {
-            case SUCCESS:
-              return false; // end of data
-            case CANCELED:
-              throw new RuntimeException("canceled");
-            case FAILED:
-            default:
-              throw new RuntimeException("failed");
-            }
-          } else {
-            current = (E) parseJson((byte[]) o);
-            return true;
-          }
-        } catch (InterruptedException e) {
-          Thread.interrupted();
-          throw new RuntimeException(e);
-        }
-      }
-
-      @Override
-      public void reset() {
-        throw new UnsupportedOperationException();
-      }
-    };
+    return new JsonEnumerator(queue, holder, fields);
   }
 
   private static ObjectMapper createMapper() {
@@ -242,6 +184,68 @@ public class EnumerableDrill<E>
     }
     return Collections.unmodifiableSortedMap(map);
   }
+
+  private static class JsonEnumerator implements Enumerator {
+    private final BlockingQueue<Object> queue;
+    private final String holder;
+    private final List<String> fields;
+    private Object current;
+
+    public JsonEnumerator(BlockingQueue<Object> queue, String holder,
+        List<String> fields) {
+      this.queue = queue;
+      this.holder = holder;
+      this.fields = fields;
+    }
+
+    public Object current() {
+      return current;
+    }
+
+    public boolean moveNext() {
+      try {
+        Object o = queue.take();
+        if (o instanceof RunOutcome.OutcomeType) {
+          switch ((RunOutcome.OutcomeType) o) {
+          case SUCCESS:
+            return false; // end of data
+          case CANCELED:
+            throw new RuntimeException("canceled");
+          case FAILED:
+          default:
+            throw new RuntimeException("failed");
+          }
+        } else {
+          Object o1 = parseJson((byte[]) o);
+          if (holder != null) {
+            o1 = ((Map<String, Object>) o1).get(holder);
+          }
+          if (fields == null) {
+            current = o1;
+          } else {
+            final Map<String, Object> map = (Map<String, Object>) o1;
+            if (fields.size() == 1) {
+              current = map.get(fields.get(0));
+            } else {
+              Object[] os = new Object[fields.size()];
+              for (int i = 0; i < os.length; i++) {
+                os[i] = map.get(fields.get(i));
+              }
+              current = os;
+            }
+          }
+          return true;
+        }
+      } catch (InterruptedException e) {
+        Thread.interrupted();
+        throw new RuntimeException(e);
+      }
+    }
+
+    public void reset() {
+      throw new UnsupportedOperationException();
+    }
+  }
 }
 
 // End EnumerableDrill.java

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrillRel.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrillRel.java b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrillRel.java
index 46ffb07..c026e00 100644
--- a/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrillRel.java
+++ b/sandbox/prototype/sqlparser/src/main/java/org/apache/drill/optiq/EnumerableDrillRel.java
@@ -52,17 +52,15 @@ public class EnumerableDrillRel extends SingleRel implements EnumerableRel {
         }
       };
 
-  private static final Method OF2_METHOD;
   private static final Method OF_METHOD;
 
   private PhysType physType;
 
   static {
     try {
-      OF2_METHOD =
-          EnumerableDrill.class.getMethod("of2", String.class, List.class);
       OF_METHOD =
-          EnumerableDrill.class.getMethod("of", String.class, Class.class);
+          EnumerableDrill.class.getMethod("of", String.class, String.class,
+              List.class, Class.class);
     } catch (NoSuchMethodException e) {
       throw new RuntimeException(e);
     }
@@ -103,26 +101,23 @@ public class EnumerableDrillRel extends SingleRel implements EnumerableRel {
     drillImplementor.go(input);
     String plan = drillImplementor.getJsonString();
     Hook.LOGICAL_PLAN.run(plan);
-    if (false)
+    final List<String> fieldNameList = RelOptUtil.getFieldNameList(rowType);
+    String holder = input.getHolder();
+    if (fieldNameList.equals(Arrays.asList("_MAP")) && !holder.equals("xxx")) {
+      holder = null;
+    }
     return new BlockBuilder()
         .append(
             Expressions.call(
-                OF2_METHOD,
+                OF_METHOD,
                 Expressions.constant(plan),
+                Expressions.constant(holder),
                 Expressions.call(
                     Arrays.class,
                     "asList",
                     Expressions.newArrayInit(
                         String.class,
-                        Functions.apply(RelOptUtil.getFieldNameList(rowType),
-                            TO_LITERAL)))))
-        .toBlock();
-    else
-    return new BlockBuilder()
-        .append(
-            Expressions.call(
-                OF_METHOD,
-                Expressions.constant(plan),
+                        Functions.apply(fieldNameList, TO_LITERAL))),
                 Expressions.constant(Object.class)))
         .toBlock();
   }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcAssert.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcAssert.java b/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcAssert.java
index d755448..ecee65b 100644
--- a/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcAssert.java
+++ b/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcAssert.java
@@ -113,7 +113,7 @@ public class JdbcAssert {
       }
     }
 
-    public void plainContains(String expected) {
+    public void planContains(String expected) {
       final String[] plan0 = {null};
       Connection connection = null;
       Statement statement = null;
@@ -130,7 +130,10 @@ public class JdbcAssert {
         statement = connection.prepareStatement(sql);
         statement.close();
         final String plan = plan0[0];
-        Assert.assertTrue(plan, plan.contains(expected));
+        // it's easier to write java strings containing single quotes than
+        // double quotes
+        String expected2 = expected.replace("'", "\"");
+        Assert.assertTrue(plan, plan.contains(expected2));
       } catch (Exception e) {
         throw new RuntimeException(e);
       }

http://git-wip-us.apache.org/repos/asf/incubator-drill/blob/82d10d0f/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcTest.java
----------------------------------------------------------------------
diff --git a/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcTest.java b/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcTest.java
index 4952212..eb60844 100644
--- a/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcTest.java
+++ b/sandbox/prototype/sqlparser/src/test/java/org/apache/drill/jdbc/test/JdbcTest.java
@@ -21,6 +21,7 @@ import com.google.common.base.Function;
 
 import junit.framework.TestCase;
 
+import org.apache.drill.exec.ref.ReferenceInterpreter;
 import org.apache.drill.jdbc.DrillTable;
 
 import java.sql.*;
@@ -45,11 +46,11 @@ public class JdbcTest extends TestCase {
       + "}";
 
   private static final String EXPECTED =
-      "_MAP={donuts={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}, {id=1003, type=Blueberry}, {id=1004, type=Devil's Food}]}, id=0001, name=Cake, ppu=0.55, sales=35, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5007, type=Powdered Sugar}, {id=5006, type=Chocolate with Sprinkles}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}}\n"
-      + "_MAP={donuts={batters={batter=[{id=1001, type=Regular}]}, id=0002, name=Raised, ppu=0.69, sales=145, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}}\n"
-      + "_MAP={donuts={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}]}, id=0003, name=Old Fashioned, ppu=0.55, sales=300, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}}\n"
-      + "_MAP={donuts={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}, {id=1003, type=Blueberry}, {id=1004, type=Devil's Food}]}, filling=[{id=6001, type=None}, {id=6002, type=Raspberry}, {id=6003, type=Lemon}, {id=6004, type=Chocolate}, {id=6005, type=Kreme}], id=0004, name=Filled, ppu=0.69, sales=14, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5007, type=Powdered Sugar}, {id=5006, type=Chocolate with Sprinkles}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}}\n"
-      + "_MAP={donuts={batters={batter=[{id=1001, type=Regular}]}, id=0005, name=Apple Fritter, ppu=1.0, sales=700, topping=[{id=5002, type=Glazed}], type=donut}}\n";
+      "_MAP={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}, {id=1003, type=Blueberry}, {id=1004, type=Devil's Food}]}, id=0001, name=Cake, ppu=0.55, sales=35, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5007, type=Powdered Sugar}, {id=5006, type=Chocolate with Sprinkles}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}\n"
+      + "_MAP={batters={batter=[{id=1001, type=Regular}]}, id=0002, name=Raised, ppu=0.69, sales=145, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}\n"
+      + "_MAP={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}]}, id=0003, name=Old Fashioned, ppu=0.55, sales=300, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}\n"
+      + "_MAP={batters={batter=[{id=1001, type=Regular}, {id=1002, type=Chocolate}, {id=1003, type=Blueberry}, {id=1004, type=Devil's Food}]}, filling=[{id=6001, type=None}, {id=6002, type=Raspberry}, {id=6003, type=Lemon}, {id=6004, type=Chocolate}, {id=6005, type=Kreme}], id=0004, name=Filled, ppu=0.69, sales=14, topping=[{id=5001, type=None}, {id=5002, type=Glazed}, {id=5005, type=Sugar}, {id=5007, type=Powdered Sugar}, {id=5006, type=Chocolate with Sprinkles}, {id=5003, type=Chocolate}, {id=5004, type=Maple}], type=donut}\n"
+      + "_MAP={batters={batter=[{id=1001, type=Regular}]}, id=0005, name=Apple Fritter, ppu=1.0, sales=700, topping=[{id=5002, type=Glazed}], type=donut}\n";
 
   /** Load driver. */
   public void testLoadDriver() throws ClassNotFoundException {
@@ -103,7 +104,19 @@ public class JdbcTest extends TestCase {
   /** Query that projects an element from the map. */
   public void testProject() throws Exception {
     JdbcAssert.withModel(MODEL, "DONUTS")
-        .sql("select _MAP['donuts']['ppu'] as ppu from donuts")
+        .sql("select _MAP['ppu'] as ppu from donuts")
+        .returns("PPU=0.55\n"
+            + "PPU=0.69\n"
+            + "PPU=0.55\n"
+            + "PPU=0.69\n"
+            + "PPU=1.0\n");
+  }
+
+  /** Same logic as {@link #testProject()}, but using a subquery. */
+  public void testProjectOnSubquery() throws Exception {
+    JdbcAssert.withModel(MODEL, "DONUTS")
+        .sql("select d['ppu'] as ppu from (\n"
+             + " select _MAP as d from donuts)")
         .returns("PPU=0.55\n"
             + "PPU=0.69\n"
             + "PPU=0.55\n"
@@ -114,12 +127,15 @@ public class JdbcTest extends TestCase {
   /** Checks the logical plan. */
   public void testProjectPlan() throws Exception {
     JdbcAssert.withModel(MODEL, "DONUTS")
-        .sql("select _MAP['donuts']['ppu'] as ppu from donuts")
-        .plainContains("{\"head\":{\"type\":\"apache_drill_logical_plan\",\"version\":\"1\",\"generator\":{\"type\":\"manual\",\"info\":\"na\"}}," +
-            "\"storage\":[{\"name\":\"donuts-json\",\"type\":\"classpath\"},{\"name\":\"queue\",\"type\":\"queue\"}]," +
-            "\"query\":[" +
-            "{\"op\":\"sequence\",\"do\":[{\"op\":\"scan\",\"memo\":\"initial_scan\",\"ref\":\"donuts\",\"storageengine\":\"donuts-json\",\"selection\":{\"path\":\"/donuts.json\",\"type\":\"JSON\"}}," +
-            "{\"op\":\"store\",\"storageengine\":\"queue\",\"memo\":\"output sink\",\"target\":{\"number\":0}}]}]}");
+        .sql("select _MAP['ppu'] as ppu from donuts")
+        .planContains(
+            "{'head':{'type':'apache_drill_logical_plan','version':'1','generator':{'type':'manual','info':'na'}},"
+            + "'storage':[{'name':'donuts-json','type':'classpath'},{'name':'queue','type':'queue'}],"
+            + "'query':["
+            + "{'op':'sequence','do':["
+            + "{'op':'scan','memo':'initial_scan','ref':'_MAP','storageengine':'donuts-json','selection':{'path':'/donuts.json','type':'JSON'}},"
+            + "{'op':'project','projections':[{'expr':'_MAP.ppu','ref':'output.xxx.PPU'}]},"
+            + "{'op':'store','storageengine':'queue','memo':'output sink','target':{'number':0}}]}]}");
   }
 
   /** Query with subquery, filter, and projection of one real and one
@@ -127,7 +143,7 @@ public class JdbcTest extends TestCase {
   public void testProjectFilterSubquery() throws Exception {
     JdbcAssert.withModel(MODEL, "DONUTS")
         .sql("select d['name'] as name, d['xx'] as xx from (\n"
-            + " select _MAP['donuts'] as d from donuts)\n"
+            + " select _MAP as d from donuts)\n"
             + "where cast(d['ppu'] as double) > 0.6")
         .returns("NAME=Raised; XX=null\n"
             + "NAME=Filled; XX=null\n"
@@ -139,9 +155,15 @@ public class JdbcTest extends TestCase {
         .sql("select d['name'] as name, d['xx'] as xx from (\n"
             + " select _MAP['donuts'] as d from donuts)\n"
             + "where cast(d['ppu'] as double) > 0.6")
-        .plainContains("NAME=Raised; XX=null\n"
-            + "NAME=Filled; XX=null\n"
-            + "NAME=Apple Fritter; XX=null\n");
+        .planContains(
+            "{'head':{'type':'apache_drill_logical_plan','version':'1','generator':{'type':'manual','info':'na'}},'storage':[{'name':'donuts-json','type':'classpath'},{'name':'queue','type':'queue'}],"
+            + "'query':["
+            + "{'op':'sequence','do':["
+            + "{'op':'scan','memo':'initial_scan','ref':'_MAP','storageengine':'donuts-json','selection':{'path':'/donuts.json','type':'JSON'}},"
+            + "{'op':'filter','expr':'(_MAP.donuts.ppu > 0.6)'},"
+            + "{'op':'project','projections':[{'expr':'_MAP.donuts','ref':'output.xxx.D'}]},"
+            + "{'op':'project','projections':[{'expr':'xxx.name','ref':'output.xxx.NAME'},{'expr':'xxx.xx','ref':'output.xxx.XX'}]},"
+            + "{'op':'store','storageengine':'queue','memo':'output sink','target':{'number':0}}]}]}");
   }
 
   /** Query that projects one field. (Disabled; uses sugared syntax.) */
@@ -156,10 +178,13 @@ public class JdbcTest extends TestCase {
   }
 
   /** Query with filter. No field references yet. */
-  public void testFilterConstant() throws Exception {
+  public void testFilterConstantFalse() throws Exception {
     JdbcAssert.withModel(MODEL, "DONUTS")
         .sql("select * from donuts where 3 > 4")
         .returns("");
+  }
+
+  public void testFilterConstant() throws Exception {
     JdbcAssert.withModel(MODEL, "DONUTS")
         .sql("select * from donuts where 3 < 4")
         .returns(EXPECTED);