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https://reviews.apache.org/r/35584/
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Review request for drill and Jinfeng Ni.
Bugs: DRILL-3298
https://issues.apache.org/jira/browse/DRILL-3298
Repository: drill-git
Description
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The JIRA DRILL-3298 has relevant discussion on this. The fix involves creating
a single stream as input to the Window by inserting a SingleMergeExchange if
only the ORDER-BY clause is present in a Window. This ensures that the Sort
below the Window is done in parallel followed by a Merge.
Diffs
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exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/WindowPrule.java
f7728c8
Diff: https://reviews.apache.org/r/35584/diff/
Testing
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Manual testing of the query in DRILL-3298. Ran unit tests. Functional tests
are in progress.
Thanks,
Aman Sinha
