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https://issues.apache.org/jira/browse/CALCITE-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838909#comment-16838909
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Julian Hyde commented on CALCITE-35:
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[~zhztheplayer], Yes exactly. I tried really hard to solve it, and couldn't.
I'm sure there is a solution, perhaps using a different approach than the one I
tried. But I'm pretty sure there isn't an easy solution we've overlooked.
> Support parenthesized sub-clause in JOIN
> ----------------------------------------
>
> Key: CALCITE-35
> URL: https://issues.apache.org/jira/browse/CALCITE-35
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.19.0
> Reporter: GitHub Import
> Priority: Major
> Labels: github-import, pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> SQL-92 allows joins to be grouped into trees using parentheses. For example,
> select * from a join (b join c on b.x = c.x) on a.y = c.y
> Optiq should support this. Currently this gives
> "org.eigenbase.util.EigenbaseException: Non-query expression encountered in
> illegal context".
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/julianhyde/optiq/issues/35
> Created by: [julianhyde|https://github.com/julianhyde]
> Labels:
> Created at: Fri Apr 19 02:46:01 CEST 2013
> State: open
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