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https://issues.apache.org/jira/browse/DRILL-3710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394980#comment-15394980
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Gautam Kumar Parai commented on DRILL-3710:
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[~amansinha100]] I have updated the pull request
(https://github.com/apache/drill/pull/552) to account for latest Calcite
changes. Can you please take a look? Thanks!
> 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: Gautam Kumar Parai
> Fix For: Future
>
>
> 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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