[jira] [Created] (SPARK-39397) Relax AliasAwareOutputExpression to support alias with expression

["XiDuo You (Jira)" <ji...@apache.org>]

XiDuo You created SPARK-39397:
---------------------------------

             Summary: Relax AliasAwareOutputExpression to support alias with expression
                 Key: SPARK-39397
                 URL: https://issues.apache.org/jira/browse/SPARK-39397
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.4.0
            Reporter: XiDuo You


We will pull out complex join keys from grouping expressions, so the project can hold a alias with expression. Unfortunately we may lose the output partitioning since the current AliasAwareOutputExpression only support preserve the alias with attribute.

As the result, the follow query will introduce three exchanges.
{code:java}
SELECT c1 + 1, count(*)
FROM t1
JOIN t2 ON c1 + 1 = c2
GROUP BY c1 + 1{code}



--
This message was sent by Atlassian Jira
(v8.20.7#820007)

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