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https://issues.apache.org/jira/browse/CALCITE-3280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16913790#comment-16913790
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Ryan Fu commented on CALCITE-3280:
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Hi [~lishuming], I was originally going to work on this but glad you were able
to help contribute.
As for adding in variants of `REGEXP_REPLACE`, I would say it would be
desirable but not necessary. One thing I would add in your pull request is a
comment about your `LibraryOperator` to describe the functionality of
`REGEXP_REPLACE`
{code:java}
/** The REGEXP_REPLACE(source_string, pattern, replacement) searches for a
regular expression pattern and replaces every occurrence of the pattern with
the specified string */
{code}
> Cannot parse query REGEXP_REPLACE in Redshift
> ---------------------------------------------
>
> Key: CALCITE-3280
> URL: https://issues.apache.org/jira/browse/CALCITE-3280
> Project: Calcite
> Issue Type: Improvement
> Reporter: Ryan Fu
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> REGEXP_REPLACE error:
> {code:}
> No match found for function signature REGEXP_REPLACE(<CHARACTER>,
> <CHARACTER>, <CHARACTER>){code}
>
> Example query:
> {code:sql}
> SELECT * , MD5(TRIM(BOTH ' ' FROM REGEXP_REPLACE(LOWER(name),
> '([[:space:]]|,)+([iInNcC]|[lLcC]).*$', ''))) AS company_id FROM
> public.account {code}
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