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https://issues.apache.org/jira/browse/CALCITE-2601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16839931#comment-16839931
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Julian Hyde commented on CALCITE-2601:
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* It's not a standard function. Can you create a new function category "j" (for
JDBC).
* And move it to {{SqlLibraryOperators}}.
* Also change the JIRA case title to "Add REVERSE function"; whether it is in
{{SqlFunctions}} is an implementation detail.
* In the description, you don't need to say that it returns null if the input
is null.
> Support REVERSE(str) in SqlFunctions
> ------------------------------------
>
> Key: CALCITE-2601
> URL: https://issues.apache.org/jira/browse/CALCITE-2601
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: TANG Wen-hui
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Returns the string _{{str}}_ with the order of the characters reversed.
> I think ’Reverse‘ seems to be a generic function.
>
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