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[jira] [Created] (CALCITE-2644) isAlwaysTrue broken for IS FALSE

Michael Mior created CALCITE-2644:

             Summary: isAlwaysTrue broken for IS FALSE
                 Key: CALCITE-2644
                 URL: https://issues.apache.org/jira/browse/CALCITE-2644
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.17.0
            Reporter: Michael Mior
            Assignee: Michael Mior

This came up in the fuzz test added by [~vlsi]. In RexCall#isAlwaysTrue, the return value for IS FALSE is the result of checking isAlwaysTrue for the operand. Similarly, the behaviour seems to also be correct for IS NOT FALSE and IS NOT TRUE. Could someone take a quick look and tell me if I'm missing something?

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