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https://issues.apache.org/jira/browse/CALCITE-710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524402#comment-14524402
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Sean Hsuan-Yi Chu commented on CALCITE-710:
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I have some idea regarding this. I am trying to fix it.
> Identical Conditions in the WHERE-CLAUSE caused assertion error
> ---------------------------------------------------------------
>
> Key: CALCITE-710
> URL: https://issues.apache.org/jira/browse/CALCITE-710
> Project: Calcite
> Issue Type: Bug
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Julian Hyde
>
> The following is a simple example,
> select empno
> from EMP
> where deptno in (1, 2) or deptno in (1, 2)
> (Using AND can also reproduce this issue)
> We have two identical conditions in the where-clause. Queries falling in this
> pattern triggers assertion error (SqlToRelConverter.java:4083)
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