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https://issues.apache.org/jira/browse/HIVE-15250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15691081#comment-15691081
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Sergey Shelukhin commented on HIVE-15250:
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Looks good, but is map needed? It seems only the values are used from it.
> Reuse partitions info generated in MoveTask to its subscribers (StatsTask)
>
> -----------------------------------------------------------------------------------------
>
> Key: HIVE-15250
> URL: https://issues.apache.org/jira/browse/HIVE-15250
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Minor
> Attachments: HIVE-15250.1.patch, HIVE-15250.2.patch
>
>
> When dynamic partitions are enabled, {{StatsTask}} loads partition
> information by querying metastore. In cases like {{insert overwrite table}},
> this can be expensive operation depending on the number of partitions
> involved (for e.g, in tpcds populating web_returns table would incur 2184 DB
> calls just on this function).
> It would be good to pass on the partition information generated in MoveTask
> to its subscribers to reduce the number of DB calls.
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