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Posted to issues@spark.apache.org by "Luka Zdravic (Jira)" <ji...@apache.org> on 2026/09/30 13:13:00 UTC

[jira] [Updated] (SPARK-59626) ASOF JOIN parser-stage defects

     [ https://issues.apache.org/jira/browse/SPARK-59626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luka Zdravic updated SPARK-59626:
---------------------------------
    Affects Version/s: 4.4.0
                           (was: 5.0.0)

> ASOF JOIN parser-stage defects
> ------------------------------
>
>                 Key: SPARK-59626
>                 URL: https://issues.apache.org/jira/browse/SPARK-59626
>             Project: Spark
>          Issue Type: Umbrella
>          Components: SQL
>    Affects Versions: 4.4.0
>            Reporter: Luka Zdravic
>            Priority: Minor
>
> ASOF JOIN enforces two grammar rules at parse time in a way that is either unclear or unsafe. 
> This umbrella tracks two parser-stage issues, one sub-task each:
>   1. An unsupported join type before ASOF (for example RIGHT, FULL, CROSS,
>      NATURAL, SEMI, ANTI, LATERAL) fails with a generic PARSE_SYNTAX_ERROR
>      instead of an error that names the incompatible join type.
>   2. A missing MATCH_CONDITION is silently ignored when the left table has no
>      alias, so ASOF JOIN degrades to a plain INNER JOIN with no error. 
>   
>   Issue 1 is a diagnostics gap: the rejection is correct but the message is
>   unhelpful. Issue 2 is a correctness bug: the query runs and returns wrong
>   results instead of failing.



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