Laljo John Pullokkaran created HIVE-5119:
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Summary: 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.
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