aweltsch opened a new pull request, #13953:
URL: https://github.com/apache/datafusion/pull/13953
## Which issue does this PR close?
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Closes #11638.
## Rationale for this change
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The objective of this PR is to optimize the `case_when: expr or expr`
benchmark. I measured a small but consistent improvement of around 10% on this
benchmark.
## What changes are included in this PR?
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I implemented an additional evaluation method to improve `CASE WHEN
condition THEN expr ELSE expr` performance.
The implementation is supposed to be very close to the existing
implementation of more general cases.
## Are these changes tested?
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I added a basic test case for the new evaluation method.
## Are there any user-facing changes?
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No, the changes should not affect the semantics of the CASE expression.
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