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https://issues.apache.org/jira/browse/CALCITE-6303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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xiong duan resolved CALCITE-6303.
---------------------------------
Fix Version/s: 1.39.0
Resolution: Fixed
> UNION with CTE(s) results in exception during query validation
> --------------------------------------------------------------
>
> Key: CALCITE-6303
> URL: https://issues.apache.org/jira/browse/CALCITE-6303
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.36.0
> Reporter: Austin Richardson
> Assignee: xiong duan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.39.0
>
>
> Attempting to execute a query that includes a UNION with CTE(s) in one of its
> operands results in a ClassCastException during query validation.
>
> Example query:
>
> {code:java}
> ( SELECT 123 )
> UNION
> ( WITH t (col) AS (VALUES (456)) SELECT col FROM t ) {code}
>
> Snippet from resulting exception:
>
> {code:java}
> java.lang.ClassCastException: class org.apache.calcite.sql.SqlNodeList cannot
> be cast to class org.apache.calcite.sql.SqlCall
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.deduceModality(SqlValidatorImpl.java:4093){code}
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