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https://issues.apache.org/jira/browse/DRILL-6381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16616290#comment-16616290
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ASF GitHub Bot commented on DRILL-6381:
---------------------------------------
amansinha100 commented on a change in pull request #1466: DRILL-6381: Add
support for index based planning and execution
URL: https://github.com/apache/drill/pull/1466#discussion_r217884619
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/JoinControl.java
##########
@@ -0,0 +1,53 @@
+/*
+ * 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 org.apache.drill.exec.planner.common;
+
+/**
+ * For the int type control,
+ * the meaning of each bit start from lowest:
+ * bit 0: intersect or not, 0 -- default(no intersect), 1 -- INTERSECT
(DISTINCT as default)
+ * bit 1: intersect type, 0 -- default (DISTINCT), 1 -- INTERSECT_ALL
+ */
+public class JoinControl {
Review comment:
The JoinControl is actually used in IndexIntersectPlanGenerator,
NonCoveringIndexPlanGenerator and a few other places. You may need to expand
those files since GitHub does not automatically load the diffs by default.
For the broader question of passing around the join type and related
information in a more componentized way, yes this has been a pending item that
planner needs to provide. Pls feel free to create a JIRA and if you have any
initial thoughts you can start proposing it there.
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> Add capability to do index based planning and execution
> -------------------------------------------------------
>
> Key: DRILL-6381
> URL: https://issues.apache.org/jira/browse/DRILL-6381
> Project: Apache Drill
> Issue Type: New Feature
> Components: Execution - Relational Operators, Query Planning &
> Optimization
> Reporter: Aman Sinha
> Assignee: Aman Sinha
> Priority: Major
> Fix For: 1.15.0
>
>
> If the underlying data source supports indexes (primary and secondary
> indexes), Drill should leverage those during planning and execution in order
> to improve query performance.
> On the planning side, Drill planner should be enhanced to provide an
> abstraction layer which express the index metadata and statistics. Further,
> a cost-based index selection is needed to decide which index(es) are
> suitable.
> On the execution side, appropriate operator enhancements would be needed to
> handle different categories of indexes such as covering, non-covering
> indexes, taking into consideration the index data may not be co-located with
> the primary table, i.e a global index.
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