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This is experimental functionality, and as such subject to change. Use at your own risk!
Merge CASE .. WHEN clauses
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
When a searched CASE expression contains consecutive
WHEN clauses returning the same value, then those
WHEN clauses can be merged.
Using Settings.transformPatternsCaseMergeWhenWhen, the following transformations can be achieved:
-- With Settings.transformPatternsCaseMergeWhenWhen active, this: SELECT CASE WHEN a = b THEN 1 WHEN c = d THEN 1 END FROM tab; -- ... is transformed into the equivalent expression: SELECT CASE WHEN a = b OR c = d THEN 1 END FROM tab;
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