Hao Zhu created DRILL-3710:
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Summary: Make the 20 in-list optimization configurable
Key: DRILL-3710
URL: https://issues.apache.org/jira/browse/DRILL-3710
Project: Apache Drill
Issue Type: Improvement
Components: Query Planning & Optimization
Affects Versions: 1.1.0
Reporter: Hao Zhu
Assignee: Jinfeng Ni
If Drill has more than 20 in-lists , Drill can do an optimization to convert
that in-lists into a small hash table in memory, and then do a table join
instead.
This can improve the performance of the query which has many in-lists.
Could we make "20" configurable? So that we do not need to add duplicate/junk
in-list to make it more than 20.
Sample query is :
select count(*) from table where col in
(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1);
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