kgyrtkirk opened a new pull request #1076: [CALCITE-2421] Generalize simplification of self-comparisions URL: https://github.com/apache/calcite/pull/1076 This change enables to rewrite comparisions between the same operands to a form which relys on the nullability check of the original expression. For example `x=x` is rewritten to `null or x is not null`
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