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https://issues.apache.org/jira/browse/CALCITE-2510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16597209#comment-16597209
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Vladimir Sitnikov commented on CALCITE-2510:
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PostgreSQL:
{code}For UTF8 the argument is treated as a Unicode code point{code}
It sounds like {{java.lang.Character#toString(int)}} is more appropriate here
> CHR support
> -----------
>
> Key: CALCITE-2510
> URL: https://issues.apache.org/jira/browse/CALCITE-2510
> Project: Calcite
> Issue Type: Task
> Components: core
> Reporter: Sergey Tsvetkov
> Assignee: Julian Hyde
> Priority: Major
>
> Adding CHR() function support, available in Oracle & PostgreSql
> [https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions019.htm]
> [https://www.postgresql.org/docs/9.4/static/functions-string.html]
>
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