Merge BIT_NOT with BIT_XNOR
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The BIT_NOT function bitwise inverts its argument value. If the argument value is a BIT_XNOR function, we can simply merge the two functions.
Using Settings.transformPatternsBitNotXNor, the following transformations can be achieved:
-- With Settings.transformPatternsBitNotXNor active, this: SELECT ~(bitxnor(a, b)), ~(bitxor(a, b)) FROM tab; -- ... is transformed into the equivalent expression: SELECT bitxor(a, b), -- ~(bitxnor(a, b)) bitxnor(a, b) -- ~(bitxor(a, b)) FROM tab;
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