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https://issues.apache.org/jira/browse/CALCITE-7105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18009813#comment-18009813
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xiong duan commented on CALCITE-7105:
-------------------------------------
Fixed in
[53cde51|https://github.com/apache/calcite/commit/53cde5105dce5c2e35f23306d9d0ec67a53fc65e].
Thanks for the review [~jensen] .
> ARRAY_CONCAT should only accept arguments with type ARRAY
> ---------------------------------------------------------
>
> Key: CALCITE-7105
> URL: https://issues.apache.org/jira/browse/CALCITE-7105
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.40.0
> Reporter: Mihai Budiu
> Assignee: Mihai Budiu
> Priority: Minor
> Labels: pull-request-available
>
> The following SqlOperatorTest will pass successfully:
> {code}
> f.checkScalar("array_concat('a')", "a", "CHAR(1) NOT NULL");
> {code}
> The spec requires the arguments to have array types.
>
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