DRILL-4678: Tune metadata by generating a dispatcher at runtime

main code changes are in Calcite library.
update drill's calcite version to 1.4.0-drill-r20.

close #793

1 files changed, 3 insertions, 2 deletions

diff --git a/contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java b/contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java
index 22894c932..58549db76 100644
--- a/contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java
+++ b/contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java
@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -31,6 +31,7 @@ import org.apache.calcite.rel.AbstractRelNode;
 import org.apache.calcite.rel.RelNode;
 import org.apache.calcite.rel.RelShuttleImpl;
 import org.apache.calcite.rel.RelWriter;
+import org.apache.calcite.rel.metadata.RelMetadataQuery;
 import org.apache.calcite.sql.SqlDialect;
 import org.apache.drill.exec.physical.base.PhysicalOperator;
 import org.apache.drill.exec.planner.physical.PhysicalPlanCreator;
@@ -90,7 +91,7 @@ public class JdbcPrel extends AbstractRelNode implements Prel {
   }
 
   @Override
-  public double getRows() {
+  public double estimateRowCount(RelMetadataQuery mq) {
     return rows;
   }