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Posted to issues@calcite.apache.org by "ShuMing Li (Jira)" <ji...@apache.org> on 2019/09/05 02:48:00 UTC

[jira] [Commented] (CALCITE-3323) Handle arbitrary/unknown functions that have ordinary syntax

    [ https://issues.apache.org/jira/browse/CALCITE-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16923004#comment-16923004 ] 

ShuMing Li commented on CALCITE-3323:
-------------------------------------

It's an interesting idea. I don't know how to handle unparsed functions?

Can you give more docs about the implements/ideas?

> Handle arbitrary/unknown functions that have ordinary syntax
> ------------------------------------------------------------
>
>                 Key: CALCITE-3323
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3323
>             Project: Calcite
>          Issue Type: New Feature
>            Reporter: Ryan Fu
>            Priority: Major
>
> Add a strategy where if a function has ordinary function syntax and we don't recognize it we assume that it can take any argument types and returns a result of unknown type.
> We will still need to change the parser to handle functions with non-standard syntax (e.g. DATEADD). And it's a good idea to explicitly add commonly used non-standard functions (e.g. MD5, CONCAT).”



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