[jira] [Resolved] (CALCITE-3005) Implement string functions: LEFT, RIGHT

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

     [ https://issues.apache.org/jira/browse/CALCITE-3005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde resolved CALCITE-3005.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.20.0

Fixed in [7f33215f|https://github.com/apache/calcite/commit/7f33215ffaf9c0b8f4bef082913c910c77bf4427]; thanks fo the PR, [~x1q1j1]!

> Implement string functions: LEFT, RIGHT
> ---------------------------------------
>
>                 Key: CALCITE-3005
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3005
>             Project: Calcite
>          Issue Type: New Feature
>            Reporter: Forward Xu
>            Assignee: Forward Xu
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.20.0
>
>          Time Spent: 6h 50m
>  Remaining Estimate: 0h
>
> Some string functions including LEFT, RIGHT are not implemented now. It would be great if these functions can be implemented.
> [{{LEFT(_str_}},_{{len}}_)|https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_left]
> Returns the leftmost _{{len}}_ characters from the string _{{str}}_, or {{NULL}} if any argument is {{NULL}}.
> [{{RIGHT(_str_}},_{{len}}_)|https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_right]
> Returns the rightmost _{{len}}_ characters from the string _{{str}}_, or {{NULL}} if any argument is {{NULL}}.



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