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https://issues.apache.org/jira/browse/IGNITE-27817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18058321#comment-18058321
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Aleksey Plekhanov commented on IGNITE-27817:
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REGEXP_SUBSTR/REGEXP_EXTRACT it's not a standard functions, there is no any
word in SQL standard about these function. Moreover, it's not a common
functions for other databases, as you can see in Apache Calcite these method
are marked as related to BigQuery dialect. Not sure we should add to Ignite
every function from every dialect that supports Apache Calcite. At least we
don't need both of these functions with dublicated functionality.
> Add REGEXP_SUBSTR/REGEXP_EXTRACT function for Calcite engine
> ------------------------------------------------------------
>
> Key: IGNITE-27817
> URL: https://issues.apache.org/jira/browse/IGNITE-27817
> Project: Ignite
> Issue Type: Improvement
> Reporter: Vladislav Pyatkov
> Assignee: Vladislav Pyatkov
> Priority: Major
> Labels: ignite-2, ise
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> h3. Motivation
> REGEXP_SUBSTR is a standard function for SQL. Moreover, Apache Calcite has
> methods to support this function.
> To work conveniently with SQL, we have to support the common function,
> especially since it is already implemented.
> h3. Definition of done
> Add the REGEXP_SUBSTR/REGEXP_EXTRACT function and tests.
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