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https://issues.apache.org/jira/browse/CALCITE-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16548631#comment-16548631
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Julian Hyde commented on CALCITE-2420:
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I see that you are trying to use the Java class java.sql.Timestamp. Calcite
represents SQL {{TIMESTAMP}} values as primitive {{long}} values (or
{{java.lang.Long}} instances if nullable), but does not use
{{java.sql.Timestamp}} internally. Try {{createSqlType(TIMESTAMP)}} rather than
{{createJavaType(Timestamp.class)}}.
> Aggregate functions MIN/MAX does not work for Timestamp
> -------------------------------------------------------
>
> Key: CALCITE-2420
> URL: https://issues.apache.org/jira/browse/CALCITE-2420
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: Piotr Bojko
> Assignee: Julian Hyde
> Priority: Major
>
> See https://github.com/ptrbojko/calcite/tree/CALCITE-2420 for reproduction.
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