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

Posted to issues@spark.apache.org by "Wenchen Fan (Jira)" <ji...@apache.org> on 2025/09/19 01:54:00 UTC

[jira] [Resolved] (SPARK-53623) O(N^2) operation in readLargeTableProp in CatalogColumnStat

     [ https://issues.apache.org/jira/browse/SPARK-53623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-53623.
---------------------------------
    Fix Version/s: 4.1.0
       Resolution: Fixed

Issue resolved by pull request 52374
[https://github.com/apache/spark/pull/52374]

> O(N^2) operation in readLargeTableProp in CatalogColumnStat
> -----------------------------------------------------------
>
>                 Key: SPARK-53623
>                 URL: https://issues.apache.org/jira/browse/SPARK-53623
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 4.0.1
>            Reporter: Yesheng Ma
>            Assignee: Yesheng Ma
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.1.0
>
>
> The CatalogColumnStat.readLargeTableProp [https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala#L766-L784] is an O(N) operation. Considering a table can have a lot of table properties, this effectively becomes an O(N^2) operation, which can be very slow for tables with a lot of table properties.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

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