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https://issues.apache.org/jira/browse/CALCITE-3415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952442#comment-16952442
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Danny Chen commented on CALCITE-3415:
-------------------------------------
Thanks [~pranay.parmar] for reporting this, i checked that there indeed don't
have a REGEXP_SUBSTR function in Calcite now, i found that Oracle has such
function as you described, maybe we can add one for the Oracle dialect. You can
add one in SqlLibraryOperators[2]
[1] https://docs.oracle.com/cd/B12037_01/server.101/b10759/functions116.htm
[2]
https://github.com/apache/calcite/blob/3cbbafa941128dc5097c2a26711f5751f764e12d/core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java#L173
> Cannot parse REGEXP_SUBSTR in BigQuery
> --------------------------------------
>
> Key: CALCITE-3415
> URL: https://issues.apache.org/jira/browse/CALCITE-3415
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Pranay Parmar
> Priority: Minor
> Fix For: 1.22.0
>
>
> REGEXP_SUBSTR error :
> {code:java}
> No match found for function signature REGEXP_SUBSTR(<CHARACTER>, <CHARACTER>,
> [<INT>, <CHARACTER>, <CHARACTER>]){code}
>
> Example query:
> {code:sql}
> SELECT REGEXP_SUBSTR('chocolate Chip cookies', 'c+.{2}', 1, product_id, 'i')
> FROM public.account{code}
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