[SPARK-12024][SQL] More efficient multi-column counting. #10015
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Test build #46814 has finished for PR 10015 at commit
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LGTM. Merging to master and 1.6. |
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In #9409 we enabled multi-column counting. The approach taken in that PR introduces a bit of overhead by first creating a row only to check if all of the columns are non-null. This PR fixes that technical debt. Count now takes multiple columns as its input. In order to make this work I have also added support for multiple columns in the single distinct code path. cc yhuai Author: Herman van Hovell <[email protected]> Closes #10015 from hvanhovell/SPARK-12024. (cherry picked from commit 3d28081) Signed-off-by: Yin Huai <[email protected]>
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In #9409 we enabled multi-column counting. The approach taken in that PR introduces a bit of overhead by first creating a row only to check if all of the columns are non-null.
This PR fixes that technical debt. Count now takes multiple columns as its input. In order to make this work I have also added support for multiple columns in the single distinct code path.
cc @yhuai