DRILL-858: Fix bugs in handling Hive views in INFORMATION_SCHEMA generation.

Also:
- Added a new interface DrillViewInfoProvider which provides view related info to
  components such as InfoSchema. Drill or Hive view table implement this interface.
- Throw UnsupportedOperationException if any queries use Hive views
  as querying Hive views is not supported in current version.

1 files changed, 2 insertions, 1 deletions

diff --git a/exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillViewTable.java b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillViewTable.java
index aaf32ad98..19fd7babf 100644
--- a/exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillViewTable.java
+++ b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillViewTable.java
@@ -32,7 +32,7 @@ import org.eigenbase.relopt.RelOptUtil;
 import org.eigenbase.reltype.RelDataType;
 import org.eigenbase.reltype.RelDataTypeFactory;
 
-public class DrillViewTable implements TranslatableTable{
+public class DrillViewTable implements TranslatableTable, DrillViewInfoProvider {
   static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DrillViewTable.class);
 
   private final View view;
@@ -71,6 +71,7 @@ public class DrillViewTable implements TranslatableTable{
     return TableType.VIEW;
   }
 
+  @Override
   public String getViewSql() {
     return view.getSql();
   }