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https://issues.apache.org/jira/browse/CALCITE-4683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17490667#comment-17490667
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xiong duan commented on CALCITE-4683:
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[~yanjing.wang] I will review it next week. And welcome everyone to review.
> In-list to join causes field datatypes not matched
> --------------------------------------------------
>
> Key: CALCITE-4683
> URL: https://issues.apache.org/jira/browse/CALCITE-4683
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.26.0, 1.27.0
> Environment: jdk8
>
> Reporter: yanjing.wang
> Assignee: yanjing.wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.30.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The sql query is
> {code:java}
> SELECT * FROM (
> SELECT '20210101' AS dt, deptno
> FROM emp
> GROUP BY deptno
> ) t
> WHERE cast(deptno as varchar) in ('1')
> {code}
> When Calcite converts the in list to a join, the original leave rel will be
> replaced by a new rel, but the new rel hasn't been set as a leave rel, This
> will cause mismatched field type.
> Finally, the query results java.lang.AssertionError: Conversion to relational
> algebra failed to preserve datatypes.
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