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https://issues.apache.org/jira/browse/CALCITE-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932868#comment-16932868
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Haisheng Yuan commented on CALCITE-1178:
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Not a bug. I think it is a yet implemented feature.
> Allow SqlBetweenOperator to compare DATE and TIMESTAMP
> ------------------------------------------------------
>
> Key: CALCITE-1178
> URL: https://issues.apache.org/jira/browse/CALCITE-1178
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Sean Hsuan-Yi Chu
> Priority: Major
>
> An expression such as
> {code}
> date '1999-03-02' between date '1999-03-01' and timestamp '1999-03-03
> 00:00:00.0'
> {code}
> will incur SqlValidatorException since SqlBetweenOperator does not allow DATE
> and TIMESTAMP comparison. In terms of usability, it would be great if this
> type of comparison is allowed in Calcite.
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