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Posted to dev@calcite.apache.org by "Kevin Risden (JIRA)" <ji...@apache.org> on 2019/03/19 10:53:00 UTC

[jira] [Created] (CALCITE-2934) Simplification of a filter =($0, false) to NOT($0) ($0 is boolean)

Kevin Risden created CALCITE-2934:
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             Summary: Simplification of a filter =($0, false) to NOT($0) ($0 is boolean)
                 Key: CALCITE-2934
                 URL: https://issues.apache.org/jira/browse/CALCITE-2934
             Project: Calcite
          Issue Type: Bug
            Reporter: Stamatis Zampetakis
             Fix For: 1.20.0


The errors occur due to the simplification of a filter =($0, false) to NOT($0) ($0 is boolean). The transformation is valid so in principle the tests should not fail. However it makes me wonder if adding negation is really a simplification. If  I want to push this expression into an index
(e.g., B+Tree) I would have to rewrite it again to something equivalent to =($0, false) since many types of indexes do not support negative conditions.



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