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https://issues.apache.org/jira/browse/CALCITE-4782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17759723#comment-17759723
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Tanner Clary commented on CALCITE-4782:
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[~julianhyde]Sorry should have clarified. Every integer aside from 0 returns
true.
> Allow 'CAST(numeric AS BOOLEAN)' (if enabled by conformance)
> ------------------------------------------------------------
>
> Key: CALCITE-4782
> URL: https://issues.apache.org/jira/browse/CALCITE-4782
> Project: Calcite
> Issue Type: Bug
> Reporter: xuyang
> Priority: Major
>
> SQL:
> {code:java}
> // code placeholder
> select * from xxx where cast(n as boolean){code}
> In calcite, casting a non-zero number to boolean is always false, which is
> different with other databases. The other databases shows that casting zero
> to boolean is false and casting non-zero value to boolean is true.
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