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https://issues.apache.org/jira/browse/HIVE-11813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14743718#comment-14743718
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Jesus Camacho Rodriguez commented on HIVE-11813:
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[~hsubramaniyan], maybe you could take a look at this one since you reviewed
HIVE-11310? In this patch we enable the same change that we did in HIVE-11310,
but for CBO i.e. we only check for cached expressions if it is a GroupBy/Having
expression.
> Avoid expensive AST tree conversion to String for expressions in WHERE clause
> in CBO
> ------------------------------------------------------------------------------------
>
> Key: HIVE-11813
> URL: https://issues.apache.org/jira/browse/HIVE-11813
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 2.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-11813.patch
>
>
> We use the AST tree String representation of a condition in the WHERE clause
> to identify its column in the RowResolver. This can lead to OOM Exceptions
> when the condition is very large.
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