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https://issues.apache.org/jira/browse/HIVE-20069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16533670#comment-16533670
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Zoltan Haindrich commented on HIVE-20069:
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so far signatures was added during stats annotation; and by doing it there - it
also "silently" also handled the case of multiple tablescans about the same
thing...
Although this should be changed later; but right now I've moved the link to a
walker (as I've done it for semijoin - because for that I saw no other way) -
so from now on this patch will incorporate HIVE-20087 as well..
> Fix reoptimization in case of DPP
> ---------------------------------
>
> Key: HIVE-20069
> URL: https://issues.apache.org/jira/browse/HIVE-20069
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-20069.01.patch
>
>
> reported by [~t3rmin4t0r]
> In case dynamic partition pruning; the operator statistics became partial; to
> only reflect the actually scanned partitions; but they are being used as an
> information about the "full" table...which leads to the exchange of the 2
> tables being joined...which is really unfortunate...
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