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

Posted to issues@spark.apache.org by "Peter Toth (Jira)" <ji...@apache.org> on 2020/10/30 14:12:00 UTC

[jira] [Created] (SPARK-33303) Deduplicate deterministic UDF calls

Peter Toth created SPARK-33303:
----------------------------------

             Summary: Deduplicate deterministic UDF calls
                 Key: SPARK-33303
                 URL: https://issues.apache.org/jira/browse/SPARK-33303
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.1.0
            Reporter: Peter Toth


We run into an issue where a customer created a column with an expensive UDF call and build a very complex logic on the the top of that column as new derived columns. Due to `CollapseProject` and `ExtractPythonUDFs` rules the UDF is called ~1000 times for each row which degraded the performance of the query significantly.

The `ExtractPythonUDFs` rule could deduplicate deterministic UDFs so as to avoid performance degradation.

 



--
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