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https://issues.apache.org/jira/browse/CALCITE-5241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17582070#comment-17582070
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Julian Hyde commented on CALCITE-5241:
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Ah, it is a JDBC function but we haven't implemented it. See
[reference.md|https://github.com/apache/calcite/blame/9bdd26159110663c4a207e3e8c378d1c3d16e034/site/_docs/reference.md#L1768]
and
[SqlOperatorTest|https://github.com/apache/calcite/blob/75d064f659a038371d84f9fdba7847e1631d1f1d/testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java#L1496].
> calcite can't support function of char(n) or {fn CHAR(string)}
> --------------------------------------------------------------
>
> Key: CALCITE-5241
> URL: https://issues.apache.org/jira/browse/CALCITE-5241
> Project: Calcite
> Issue Type: Wish
> Components: core
> Reporter: pengfei.zhan
> Priority: Major
>
> Spark and hive support `char\(n\)`, however, calcite doesn't support it. Is
> there any message I missed?
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