[
https://issues.apache.org/jira/browse/DRILL-6381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16664320#comment-16664320
]
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_r228345668
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/partitionsender/Partitioner.java
##########
@@ -29,6 +29,8 @@
import org.apache.drill.exec.record.RecordBatch;
public interface Partitioner {
+ int DEFAULT_RECORD_BATCH_SIZE = (1 << 10) - 1;
Review comment:
I think that was an omission. I have re-inserted the comment but with some
modifications because the batch-sizing project now allows operators to set the
output batch size in terms of Mbytes rather than `recordCount`. It is not yet
applied across the board, so this `DEFAULT_RECORD_BATCH_SIZE` is still relevant
for the exchange operators.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
> 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.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
