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https://issues.apache.org/jira/browse/CALCITE-653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14385074#comment-14385074
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Julian Hyde commented on CALCITE-653:
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Can you provide a SQL query which fails? It's not valid to combine window
functions with filters, but AFAIK it is OK to combine projects of window
functions.
> ProjectMerge rule merges unmergeable projects involving analytic function
> -------------------------------------------------------------------------
>
> Key: CALCITE-653
> URL: https://issues.apache.org/jira/browse/CALCITE-653
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.1.0-incubating
> Reporter: Ashutosh Chauhan
> Assignee: Julian Hyde
>
> case in point being projections involving lead and rank functions.
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