[
https://issues.apache.org/jira/browse/HIVE-22074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16912877#comment-16912877
]
Jesus Camacho Rodriguez commented on HIVE-22074:
------------------------------------------------
+1 (pending tests)
> Slow compilation due to IN to OR transformation
> -----------------------------------------------
>
> Key: HIVE-22074
> URL: https://issues.apache.org/jira/browse/HIVE-22074
> Project: Hive
> Issue Type: Improvement
> Components: Logical Optimizer
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-22074.1.patch, HIVE-22074.2.patch,
> HIVE-22074.3.patch, HIVE-22074.4.patch, HIVE-22074.5.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Currently Hive transform IN expressions to OR to apply various CBO rules.
> This incur significant performance hit if IN consist of large number of
> expressions.
> It is better to not transform IN expressions to OR in such cases because
> overall benefit of various optimizations/transformations is unrealized due to
> the compilation overhead
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
