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https://reviews.apache.org/r/20746/
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Review request for drill.
Bugs: DIRLL-578
https://issues.apache.org/jira/browse/DIRLL-578
Repository: drill-git
Description
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Fix performance issue in hash join, when the build side table contains large
number of duplicate keys.
Also iron out some NPE when the build / probe side batch is empty while
performing hash join.
Diffs
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exec/java-exec/src/main/java/org/apache/drill/exec/physical/config/HashJoinPOP.java
0718bff
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinBatch.java
7ada651
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinHelper.java
e0098b1
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinProbe.java
c99f2a6
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinProbeTemplate.java
cc1a257
exec/java-exec/src/test/java/org/apache/drill/exec/physical/impl/join/TestHashJoin.java
ba067e2
exec/java-exec/src/test/resources/join/hj_exchanges.json PRE-CREATION
Diff: https://reviews.apache.org/r/20746/diff/
Testing
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Added test with exchanges
Thanks,
Mehant Baid
