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From mahong...@apache.org
Subject [3/3] kylin git commit: KYLIN-2029 distinct count query on lookup table
Date Tue, 20 Sep 2016 13:17:39 GMT
KYLIN-2029 distinct count query on lookup table


Project: http://git-wip-us.apache.org/repos/asf/kylin/repo
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/472e6d54
Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/472e6d54
Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/472e6d54

Branch: refs/heads/master
Commit: 472e6d547f2f04b8d6f92b9affa173a9685d3d2d
Parents: 7d716df
Author: Hongbin Ma <mahongbin@apache.org>
Authored: Tue Sep 20 18:19:19 2016 +0800
Committer: Hongbin Ma <mahongbin@apache.org>
Committed: Tue Sep 20 21:17:12 2016 +0800

----------------------------------------------------------------------
 .../test/resources/query/sql_lookup/query05.sql  | 19 +++++++++++++++++++
 .../kylin/query/relnode/OLAPAggregateRel.java    |  8 ++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/kylin/blob/472e6d54/kylin-it/src/test/resources/query/sql_lookup/query05.sql
----------------------------------------------------------------------
diff --git a/kylin-it/src/test/resources/query/sql_lookup/query05.sql b/kylin-it/src/test/resources/query/sql_lookup/query05.sql
new file mode 100644
index 0000000..31fdf61
--- /dev/null
+++ b/kylin-it/src/test/resources/query/sql_lookup/query05.sql
@@ -0,0 +1,19 @@
+--
+-- 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.
+--
+
+select count(distinct META_CATEG_NAME) as CNT ,max(META_CATEG_NAME) as y from test_category_groupings

http://git-wip-us.apache.org/repos/asf/kylin/blob/472e6d54/query/src/main/java/org/apache/kylin/query/relnode/OLAPAggregateRel.java
----------------------------------------------------------------------
diff --git a/query/src/main/java/org/apache/kylin/query/relnode/OLAPAggregateRel.java b/query/src/main/java/org/apache/kylin/query/relnode/OLAPAggregateRel.java
index f55c86f..97efb27 100644
--- a/query/src/main/java/org/apache/kylin/query/relnode/OLAPAggregateRel.java
+++ b/query/src/main/java/org/apache/kylin/query/relnode/OLAPAggregateRel.java
@@ -265,7 +265,7 @@ public class OLAPAggregateRel extends Aggregate implements OLAPRel {
         implementor.visitChild(this, getInput());
 
         // only rewrite the innermost aggregation
-        if (!this.afterAggregate && RewriteImplementor.needRewrite(this.context))
{
+        if (!this.afterAggregate) {
             // rewrite the aggCalls
             this.rewriteAggCalls = new ArrayList<AggregateCall>(aggCalls.size());
             for (int i = 0; i < this.aggCalls.size(); i++) {
@@ -354,11 +354,15 @@ public class OLAPAggregateRel extends Aggregate implements OLAPRel {
         }
     }
 
+    private boolean noPrecaculatedFieldsAvailable() {
+        return !this.context.hasPrecalculatedFields() || !RewriteImplementor.needRewrite(this.context);
+    }
+
     private AggregateCall rewriteAggregateCall(AggregateCall aggCall, FunctionDesc func)
{
 
         //if it's not a cube, then the "needRewriteField func" should not resort to any rewrite
fields, 
         // which do not exist at all
-        if (!this.context.hasPrecalculatedFields() && func.needRewriteField()) {
+        if (noPrecaculatedFieldsAvailable() && func.needRewriteField()) {
             logger.info(func + "skip rewriteAggregateCall because no pre-aggregated field
available");
             return aggCall;
         }


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