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Posted to issues@calcite.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/11/04 02:48:00 UTC

[jira] [Updated] (CALCITE-4363) Need a utility to check if a SQL operator is standard

     [ https://issues.apache.org/jira/browse/CALCITE-4363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-4363:
------------------------------------
    Labels: pull-request-available  (was: )

> Need a utility to check if a SQL operator is standard
> -----------------------------------------------------
>
>                 Key: CALCITE-4363
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4363
>             Project: Calcite
>          Issue Type: Wish
>          Components: core
>            Reporter: Liya Fan
>            Assignee: Liya Fan
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently, all standard SQL operators are defined in SqlStdOperatorTable.java as static members, not as enums. This makes it difficult to check if a SQL function is a standard one. 
> In many scenarios, we need such a check. For example, some optimizations can be performed, if we know the function is standard (not user-defined), because user-defined functions may have some unknown side-effects.
> To support the check, we only need to maintain a set that contains all standard operators. 
> Do you think such a utility should be supported?
>  



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