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[feature](agg function) support corr_welford agg function #49712 - #50274
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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TPC-H: Total hot run time: 40471 ms |
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TPC-DS: Total hot run time: 190653 ms |
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BE UT Coverage ReportIncrement line coverage Increment coverage report
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PR approved by at least one committer and no changes requested. |
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PR approved by anyone and no changes requested. |
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pick #49712
In the past, due to performance considerations, the implementation of corr was relatively simple, avoiding division operations except in the final step.
However, this approach resulted in larger errors, so corr_welford was introduced to improve the accuracy of the calculations.
What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
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Test
Behavior changed:
Does this need documentation?
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