HIVE-24976: CBO: count(distinct) in a window function fails CBO #2155
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What changes were proposed in this pull request?
Enable usage of
distinctin aggregate functions in windowing clause.For vectorized mode it is still enabled for
countonly because it is not implemented for the rest of the functions.Why are the changes needed?
SQL standard allows.
Does this PR introduce any user-facing change?
No.
How was this patch tested?