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https://issues.apache.org/jira/browse/FLINK-26542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu reassigned FLINK-26542:
-------------------------------
Assignee: luoyuxia
> Fix "schema of both sides of union should match" exception when one side of
> union select multiple same coulmns
> --------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-26542
> URL: https://issues.apache.org/jira/browse/FLINK-26542
> Project: Flink
> Issue Type: Sub-task
> Components: Connectors / Hive
> Reporter: luoyuxia
> Assignee: luoyuxia
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
>
> With Hive dialect, for union sql statement, if one side of union select
> multiple same columns, the columns will be duplicated, thus only retains one
> column. Then it will throw the exception "Schema of both sides of union
> should match" for it will loss some columns.
> It can be reproduced using the following code in HiveDialectQueryITCase:
> {code:java}
> List<Row> result =
> CollectionUtil.iteratorToList(
> tableEnv.executeSql("select x,y from foo union all
> select i,i from bar")
> .collect());
> {code}
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