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https://issues.apache.org/jira/browse/HIVE-1750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12927312#action_12927312
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Namit Jain commented on HIVE-1750:
----------------------------------
OpProcFactory:
for (Partition p: prunedPartList.getConfirmedPartns()) {
if (!p.getTable().isPartitioned()) {
return null;
}
}
for (Partition p: prunedPartList.getUnknownPartns()) {
if (!p.getTable().isPartitioned()) {
return null;
}
}
Why are the above changes needed ?
The overall approach looks good - still looking in detail.
> Remove Partition Filtering Conditions when Possible
> ---------------------------------------------------
>
> Key: HIVE-1750
> URL: https://issues.apache.org/jira/browse/HIVE-1750
> Project: Hive
> Issue Type: Improvement
> Reporter: Siying Dong
> Assignee: Siying Dong
> Attachments: HIVE-1750.1.patch, HIVE-1750.2.patch
>
>
> For some simple queries, partition filtering constraints take 8% of CPU time
> (now 16% since we filter twice) even if the result is always true. When
> possible, we should remove these constraints to save CPU times.
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