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Posted to issues@calcite.apache.org by "Vladimir Sitnikov (JIRA)" <ji...@apache.org> on 2018/08/07 09:29:00 UTC

[jira] [Created] (CALCITE-2451) RexSimplify: fuse unknownAsFalse and IS TRUE handling

Vladimir Sitnikov created CALCITE-2451:
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             Summary: RexSimplify: fuse unknownAsFalse and IS TRUE handling
                 Key: CALCITE-2451
                 URL: https://issues.apache.org/jira/browse/CALCITE-2451
             Project: Calcite
          Issue Type: Sub-task
          Components: core
    Affects Versions: 1.17.0
            Reporter: Vladimir Sitnikov
            Assignee: Julian Hyde


It looks like {{unknownAsFalse}} duplicates {{IS_TRUE}} handling.

In other words, {{withUnknownAsFalse(true). simplfy(expr)}} is more or less comparable to {{simplify(isTrue(expr))}}

Implementing {{IS_TRUE/IS_FALSE/...}} simplification possibilities might make {{unknownAsFalse}} obsolete.



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