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From "Alfonso Nishikawa (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-1683) Column aliases cannot be used in a group by clause
Date Wed, 23 Aug 2017 10:27:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16138203#comment-16138203
] 

Alfonso Nishikawa edited comment on HIVE-1683 at 8/23/17 10:26 AM:
-------------------------------------------------------------------

For anyone reaching this comments, it is possible to set the group by position (not by alias,
but in much cases will be enough) configuring {{set hive.groupby.orderby.position.alias=true;}}.

>From [https://cwiki.apache.org/confluence/display/Hive/LanguageManual+GroupBy] :

bq. In groupByExpression columns are specified by name, not by position number. However in
Hive 0.11.0 and later, columns can be specified by position when configured as follows:
bq.    For Hive 0.11.0 through 2.1.x, set hive.groupby.orderby.position.alias to true (the
default is false).
bq.    For Hive 2.2.0 and later, set hive.groupby.position.alias to true (the default is false).




was (Author: alfonso.nishikawa):
For anyone reaching this comments, it is possible to set the group by position (not by alias,
but in much cases will be enough) configuring {{set hive.groupby.orderby.position.alias=true;}}.

>From [https://cwiki.apache.org/confluence/display/Hive/LanguageManual+GroupBy] :

bq. In groupByExpression columns are specified by name, not by position number. However in
Hive 0.11.0 and later, columns can be specified by position when configured as follows:
    For Hive 0.11.0 through 2.1.x, set hive.groupby.orderby.position.alias to true (the default
is false).
    For Hive 2.2.0 and later, set hive.groupby.position.alias to true (the default is false).



> Column aliases cannot be used in a group by clause
> --------------------------------------------------
>
>                 Key: HIVE-1683
>                 URL: https://issues.apache.org/jira/browse/HIVE-1683
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>            Reporter: Shrikrishna Lawande
>              Labels: SQL
>
> Column aliases cannot be used in a group by clause
> Following query would fail :
> select col1 as t, count(col2) from test group by t;
> FAILED: Error in semantic analysis: line 1:49 Invalid Table Alias or Column Reference
t



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