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Available in versions: Dev (3.18)
This is experimental functionality, and as such subject to change. Use at your own risk!
This documentation is for the unreleased development version of jOOQ. Click on the above version links to get this documentation for a supported version of jOOQ.
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;