You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@spark.apache.org by "Gengliang Wang (Jira)" <ji...@apache.org> on 2021/04/12 12:18:00 UTC

[jira] [Created] (SPARK-35028) ANSI mode: disallow group by aliases

Gengliang Wang created SPARK-35028:
--------------------------------------

             Summary: ANSI mode: disallow group by aliases
                 Key: SPARK-35028
                 URL: https://issues.apache.org/jira/browse/SPARK-35028
             Project: Spark
          Issue Type: New Feature
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: Gengliang Wang
            Assignee: Gengliang Wang


As per the ANSI SQL standard secion 7.12 <group by clause>: 
bq. Each <grouping column reference> shall unambiguously reference a column of the table resulting from the <from clause>. A column referenced in a <group by clause> is a grouping column.

By forbidding it, we can avoid ambiguous SQL queries like:
SELECT col + 1 as col FROM t GROUP BY col



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org