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https://issues.apache.org/jira/browse/CALCITE-6206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17808006#comment-17808006
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Jiajun Xie commented on CALCITE-6206:
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I have seen similar features before.
There are `UDFTransformer` in Coral.
Here is
[demo|https://github.com/linkedin/coral/commit/99310c2b423f12f355851140064bb46bddfaa126]
about Hive "pmod" to Trino "mod",
> Add library operator mapping for unparsing
> ------------------------------------------
>
> Key: CALCITE-6206
> URL: https://issues.apache.org/jira/browse/CALCITE-6206
> Project: Calcite
> Issue Type: Improvement
> Reporter: Tanner Clary
> Assignee: Tanner Clary
> Priority: Major
>
> [~julianhyde] and I have talked about adding the ability to reference
> cross-dialect operator aliases during unparsing so it does not need to be
> "manually added".
> For instance, if unparsing a call for the "STARTS_WITH" operator for the
> Snowflake dialect, it would be nice if there was some sort of map that could
> be referenced to see that the call should be unparsed with "STARTSWITH"
> instead.
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