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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.
CASE searched to CASE simple
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A searched CASE expression can be simplified into a simple
CASE expression, if it always equality compares the same expression.
Using Settings.transformPatternsCaseSearchedToCaseSimple, the following transformations can be achieved:
-- With Settings.transformPatternsCaseSearchedToCaseSimple active, this: SELECT CASE WHEN a = b THEN 1 END, CASE WHEN a = b THEN 1 WHEN a = c THEN 2 ELSE 3 END FROM tab; -- ... is transformed into the equivalent expression: SELECT CASE a WHEN b THEN 1 END, CASE a WHEN b THEN 1 WHEN c THEN 2 ELSE 3 END FROM tab;