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https://issues.apache.org/jira/browse/HIVE-5119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15027699#comment-15027699
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Laljo John Pullokkaran commented on HIVE-5119:
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This is fixed by DPP work.
> MapJoin & Partition Pruning (MapJoin can take advantage of materialized data
> to prune partitions of big table)
> --------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-5119
> URL: https://issues.apache.org/jira/browse/HIVE-5119
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.11.0
> Reporter: Laljo John Pullokkaran
> Assignee: Laljo John Pullokkaran
>
> Map-Join predicates where the joining columns from big table (streamed table)
> are partition columns and corresponding columns from small table is not
> partitioned, the join would not prune the unnecessary partitions from big
> table. Since data for all small tables is materialized before big table is
> streamed, theoretically it would be possible to prune the unnecessary
> partitions from big table.
> Proposal document is at https://cwiki.apache.org/confluence/x/sgkHAg
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