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Posted to issues@drill.apache.org by "Aman Sinha (JIRA)" <ji...@apache.org> on 2015/05/10 02:46:59 UTC

[jira] [Created] (DRILL-3009) Reduce the IN list threshold to 10 to take advantage of Values operator

Aman Sinha created DRILL-3009:
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             Summary: Reduce the IN list threshold to 10 to take advantage of Values operator
                 Key: DRILL-3009
                 URL: https://issues.apache.org/jira/browse/DRILL-3009
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
            Reporter: Aman Sinha
            Assignee: Aman Sinha


The IN-list threshold is currently set to 200 (it was bumped up from 20 previously since Drill did not have the Values operator).   Now that Drill can support large IN lists through the Values operator, we should drop the threshold back and in fact lower it to 10.   

For lists below this threshold, Calcite will build a binary tree of OR's.   Above this threshold, it will create a ValuesRel .



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