[jira] [Closed] (SPARK-13321) Add nested union test cases

["Liang-Chi Hsieh (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-13321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liang-Chi Hsieh closed SPARK-13321.
-----------------------------------
    Resolution: Not A Problem

> Add nested union test cases
> ---------------------------
>
>                 Key: SPARK-13321
>                 URL: https://issues.apache.org/jira/browse/SPARK-13321
>             Project: Spark
>          Issue Type: Test
>          Components: SQL
>            Reporter: Liang-Chi Hsieh
>            Assignee: Liang-Chi Hsieh
>            Priority: Minor
>
> The following SQL can not be parsed with current parser:
> {code}
> SELECT  `u_1`.`id` FROM (((SELECT  `t0`.`id` FROM `default`.`t0`) UNION ALL (SELECT  `t0`.`id` FROM `default`.`t0`)) UNION ALL (SELECT  `t0`.`id` FROM `default`.`t0`)) AS u_1
> {code}
> We should fix it.
> The above description is for ANTLR3 parser. As ANTLR4 parser supports it now, we just need to add test cases.



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