HIVE-26368: DISTINCT keyword from Count UDF is removed from query pla…#6582
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soumyakanti3578 wants to merge 1 commit into
Open
HIVE-26368: DISTINCT keyword from Count UDF is removed from query pla…#6582soumyakanti3578 wants to merge 1 commit into
soumyakanti3578 wants to merge 1 commit into
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…n when CBO is enabled
asf-ci-hive
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…n when CBO is enabled
What changes were proposed in this pull request?
Add a check in
HiveExpandDistinctAggregatesRuleand return early if there are multiple columns in aCOUNT DISTINCTWhy are the changes needed?
Otherwise the rule removes
DISTINCTfrom theCOUNT, and when theCOUNTis over multiple columns,GenericUDAFCountexpects aDISTINCT(which is also semantically right).Does this PR introduce any user-facing change?
No
How was this patch tested?