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https://issues.apache.org/jira/browse/CALCITE-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenzheng Liu updated CALCITE-2231:
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Summary: the unparsed result of union selects as subselect in select clause
is not valid (was: union selects as subselect in select clause unparsed result
is not valid)
> the unparsed result of union selects as subselect in select clause is not
> valid
> -------------------------------------------------------------------------------
>
> Key: CALCITE-2231
> URL: https://issues.apache.org/jira/browse/CALCITE-2231
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Wenzheng Liu
> Assignee: Julian Hyde
> Priority: Major
>
> for example, "select a1, b1 from t1, (select a2, b2 from t2 union select a3,
> b3 from t3)" will be unparsed as "select a1, b1, from t1, select a2, b2 from
> t2 union select a3, b3 from t3". Obviously, "(" and ")" is needed in union
> selects clause
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