[jira] [Commented] (CALCITE-4099) Unify Strong.Policy and NullPolicy

["Julian Hyde (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17149716#comment-17149716 ] 

Julian Hyde commented on CALCITE-4099:
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NullPolicy and Strong represent arrows in different directions - null policy says whether an expression is null *if* its input is null, and strong says whether the expression is null *only if* its input is null.

So, unifying them might not be trivial. The unified enum would certainly have more cases than either of the original 2 enums.

> Unify Strong.Policy and NullPolicy
> ----------------------------------
>
>                 Key: CALCITE-4099
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4099
>             Project: Calcite
>          Issue Type: Task
>          Components: core
>            Reporter: Ruben Q L
>            Priority: Minor
>
> (discussion about this ticket started in CALCITE-4094)
> {{Strong.Policy}} and {{NullPolicy}} are two different enum that represent grosso-modo the same thing. The former is mostly used on the simplifier, and the latter on the code generation.
> To be studied if we could unify both entities and make it available through the SqlOperator.



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