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https://issues.apache.org/jira/browse/CALCITE-5656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17715214#comment-17715214
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Jiajun Xie commented on CALCITE-5656:
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The issue look like CALCITE-5530.
I think my PR can solve the problem.
https://github.com/apache/calcite/pull/3085
> RelToSqlConverter has an error using ordinal for ORDER BY
> ---------------------------------------------------------
>
> Key: CALCITE-5656
> URL: https://issues.apache.org/jira/browse/CALCITE-5656
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.34.0
> Reporter: luoping.zhang
> Assignee: luoping.zhang
> Priority: Critical
> Labels: pull-request-available
> Attachments: image-2023-04-19-12-26-32-719.png
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> For example:
> Query SQL is
> {code:java}
> select a from table order by coalesce(a,b){code}
> When we convert this sql to relNode and convert it back to SQL by
> RelToConverter, the result is:
> {code:java}
> select a from table order by 2{code}
> But this sql syntax is wrong because there is no ordinal 2
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