[jira] [Updated] (SPARK-28228) Fix substitution order of nested WITH clauses

["Peter Toth (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-28228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Toth updated SPARK-28228:
-------------------------------
    Summary: Fix substitution order of nested WITH clauses  (was: Better support for WITH clause)

> Fix substitution order of nested WITH clauses
> ---------------------------------------------
>
>                 Key: SPARK-28228
>                 URL: https://issues.apache.org/jira/browse/SPARK-28228
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Peter Toth
>            Priority: Major
>
> PostgreSQL handles nested WITHs in a different way then Spark does currently. These queries retunes 1 in Spark while they return 2 in PostgreSQL:
> {noformat}
> WITH
>   t AS (SELECT 1),
>   t2 AS (
>     WITH t AS (SELECT 2)
>     SELECT * FROM t
>   )
> SELECT * FROM t2
> {noformat}
> {noformat}
> WITH t AS (SELECT 1)
> SELECT (
>   WITH t AS (SELECT 2)
>   SELECT * FROM t
> )
> {noformat}



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