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https://issues.apache.org/jira/browse/CALCITE-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stamatis Zampetakis closed CALCITE-2934.
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Resolution: Not A Problem
> 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
> Priority: Major
> 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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