[
https://issues.apache.org/jira/browse/SPARK-28299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Peter Toth resolved SPARK-28299.
--------------------------------
Resolution: Duplicate
> Evaluation of multiple CTE uses
> ---------------------------------
>
> Key: SPARK-28299
> URL: https://issues.apache.org/jira/browse/SPARK-28299
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Peter Toth
> Priority: Major
>
> This query returns 2 in Spark SQL (ie. the CTE is evaluated twice), but it
> returns 1 in PostgreSQL.
> {noformat}
> WITH t(x) AS (SELECT random())
> SELECT count(*) FROM (
> SELECT * FROM t
> UNION
> SELECT * FROM t
> ) x
> {noformat}
> I tested MSSQL too and it returns 2 as Spark SQL does. Further tests are
> needed on different DBs...
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
