[jira] [Created] (CALCITE-1497) Invalid implications

["Julian Hyde (JIRA)" <ji...@apache.org>]

Julian Hyde created CALCITE-1497:
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             Summary: Invalid implications
                 Key: CALCITE-1497
                 URL: https://issues.apache.org/jira/browse/CALCITE-1497
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


RexImplicationChecker makes some mistakes when OR is on the left-hand size or AND is on the right-hand side. The following 3 tests should all succeed, but all currently give the wrong result. I intend to check in the tests with my fix for CALCITE-1483 (coming soon, currently in my branch https://github.com/julianhyde/calcite/tree/1483-not-in-not-null).

{code}
    // "s is not null or i = 5" does not imply "s is not null"
    f.checkNotImplies(f.or(sIsNotNull, iEq5), sIsNotNull);

    // "s is not null" implies "s is not null or i = 5"
    f.checkImplies(sIsNotNull, f.or(sIsNotNull, iEq5));

    // "s is not null" implies "i = 5 or s is not null"
    f.checkImplies(sIsNotNull, f.or(iEq5, sIsNotNull));
{code}

[~amargoor], Can you comment on these?



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