[jira] [Commented] (CALCITE-5759) SEARCH operator with special sarg is not fully simplified

["xiong duan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-5759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729942#comment-17729942 ] 

xiong duan commented on CALCITE-5759:
-------------------------------------

I think this is reasonable.  +1

> SEARCH operator with special sarg is not fully simplified
> ---------------------------------------------------------
>
>                 Key: CALCITE-5759
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5759
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.34.0
>            Reporter: Runkang He
>            Priority: Major
>
> The minimal reproducer is to construct a RexCall with RexUnknownAs.FALSE as below:
> {code:sql}
> SEARCH(1, Sarg[IS NOT NULL])
> {code}
> After RexSimplify#simplifySearch, the final simplified result is IS NOT NULL(1), which should be TRUE more thoroughly.
> Also, the following RexCall with RexUnknownAs.TRUE:
> {code:sql}
> SEARCH(1, Sarg[IS NULL])
> {code}
> Is simplified to IS NULL(1), which should be FALSE.
> Note that current simplified result is inconsistent with RexCall.isAlwaysFalse and isAlwaysTrue.
> Therefore, for the above two reasons, I think we need to simplify SEARCH operator with special sarg more thoroughly.



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