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https://issues.apache.org/jira/browse/CALCITE-3934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17086193#comment-17086193
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Danny Chen commented on CALCITE-3934:
-------------------------------------
Thanks for the reivew, the '||' always works well because it only allows 2
STRING operands.
Fix the left review addresses.
> Allow type-coercion in CONCAT operator
> --------------------------------------
>
> Key: CALCITE-3934
> URL: https://issues.apache.org/jira/browse/CALCITE-3934
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.22.0
> Reporter: Danny Chen
> Assignee: Danny Chen
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.23.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Supports implicit type coercion for operators with repeated type families,
> such as:
> {code:sql}
> CONCAT(123, 'abc', DATE '2020-04-17')
> {code}
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