HIVE-29646: Enable semijoin reduction and map-join conversion on external tables with accurate statistics#6525
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deniskuzZ wants to merge 1 commit into
Open
HIVE-29646: Enable semijoin reduction and map-join conversion on external tables with accurate statistics#6525deniskuzZ wants to merge 1 commit into
deniskuzZ wants to merge 1 commit into
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…rnal tables with accurate statistics
aturoczy
approved these changes
Jun 4, 2026
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What changes were proposed in this pull request?
Enables semijoin reduction and map-join conversion on external tables with accurate statistics
Why are the changes needed?
Performance optimization (parity with other engines like Impala/Trino)
Does this PR introduce any user-facing change?
No
How was this patch tested?
TPC-DS, scale 1Tb, external, parquet, 10 workers
70 sec (before), 25 sec (after)