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Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

A concatenation of AND predicates combining non-equalities that always use the same operand on one side can be replaced by a more concise, but equivalent NOT IN predicate.

Using Settings.transformPatternsAndNeToNotIn, the following transformations can be achieved:

-- With Settings.transformPatternsAndNeToNotIn active, this:
SELECT * FROM tab WHERE x != 1 AND x != 2 AND x != 3;

-- ... is transformed into the equivalent expression:
SELECT * FROM tab WHERE x NOT IN (1, 2, 3);

See also OR to IN

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