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https://issues.apache.org/jira/browse/HIVE-15874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875249#comment-15875249
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Walter Wu edited comment on HIVE-15874 at 2/21/17 2:22 AM:
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Thanks pxiong Pengcheng Xiong for review
was (Author: walter wu):
Thanks Pengcheng Xiong for review
> Invalid position alias in Group By when CBO failed
> ---------------------------------------------------
>
> Key: HIVE-15874
> URL: https://issues.apache.org/jira/browse/HIVE-15874
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 1.2.1, 2.1.1
> Reporter: Walter Wu
> Assignee: Pengcheng Xiong
> Fix For: 2.2.0
>
> Attachments: HIVE-15874.patch
>
>
> for example：
> create table alias_test_01(a INT, b STRING) ;
> create table alias_test_02(a INT, b STRING) ;
> create table alias_test_03(a INT, b STRING) ;
> set hive.groupby.position.alias = true;
> set hive.cbo.enable=true;
> explain
> select * from
> alias_test_01 alias01
> left join
> (
> select 2017 as a, b from alias_test_02 group by 1, 2
> ) alias02
> on alias01.a = alias02.a
> left join
> alias_test_03 alias03
> on alias01.a = alias03.a;
> error info:
> FAILED: SemanticException [Error 10220]: Invalid position alias in Group By
> Position alias: 2017 does not exist
> The Select List is indexed from 1 to 2
> the first process Position Alias result:
> when CBO optimize failed and reAnalyzeAST is true, position alias will be
> processed twice.
> 1. 'group by 1, 2' convert to 'group by 2017, b'
> 2. 'group by 2017, b' 2017 column does not exist
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