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https://issues.apache.org/jira/browse/HIVE-14055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15340824#comment-15340824
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Sergey Shelukhin commented on HIVE-14055:
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null means "filter cannot be pushed down", which is a normal condition, many
filters cannot be pushed down; some of the methods (e.g. get partitions)
evaluate it in metastore instead, using partition name list, some give up and
fall back to ORM path. Perhaps I can c/p the evaluation path.
> directSql - getting the number of partitions is broken
> ------------------------------------------------------
>
> Key: HIVE-14055
> URL: https://issues.apache.org/jira/browse/HIVE-14055
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-14055.patch
>
>
> Noticed while looking at something else. If the filter cannot be pushed down
> it just returns 0
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