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This is experimental functionality, and as such subject to change. Use at your own risk!
CASE with ELSE NULL
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
When CASE expressions have no
ELSE clause, the default is
ELSE NULL. There is no need to explicitly set that clause to
Using Settings.transformPatternsCaseElseNull, the following transformations can be achieved:
-- With Settings.transformPatternsCaseElseNull active, this: SELECT CASE a WHEN b THEN 1 ELSE NULL END, -- Simple CASE CASE WHEN a = b THEN 1 ELSE NULL END -- Searched CASE FROM tab; -- ... is transformed into the equivalent expression: SELECT CASE a WHEN b THEN 1 END, CASE WHEN a = b THEN 1 END FROM tab;
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