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https://issues.apache.org/jira/browse/HIVE-9200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14260713#comment-14260713
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Laljo John Pullokkaran commented on HIVE-9200:
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Global DS is used in Hive at three different places:
1. Semantic Analyzer during plan gen
2. Carry those global DS in to parse context which is then used by logical
3. Task Compiler which uses Parse Context in Physical Optimizer and translation
to targeted execution engine.
I think for our purpose we need to first take care of #2, #3. i.e clear
ParseContext of the global DS as much as possible and leave #1 as it is.
> CBO (Calcite Return Path): Inlining data structures of ParseContext in Join
> operator
> ------------------------------------------------------------------------------------
>
> Key: HIVE-9200
> URL: https://issues.apache.org/jira/browse/HIVE-9200
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Fix For: 0.15.0
>
>
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