[ https://issues.apache.org/jira/browse/SPARK-46482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ivan Sadikov updated SPARK-46482: --------------------------------- Summary: Revert SPARK-43049 due to performance regression of using CLOB (was: Revert SPARK-43049 due to performance regression) > Revert SPARK-43049 due to performance regression of using CLOB > -------------------------------------------------------------- > > Key: SPARK-46482 > URL: https://issues.apache.org/jira/browse/SPARK-46482 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 3.4.1, 3.5.0 > Reporter: Ivan Sadikov > Priority: Major > > SPARK-43049 causes performance regression when writing string fields to an > Oracle database due to strings written as CLOB instead of VARCHAR2. CLOB is > known to have bad performance in Oracle so when creating a table and writing > to it using Spark, SQL statement would take at least 5x performance hit from > the original patch (2 min vs 10+ min). > I confirmed internally that running a job with the commit reverted brings > back the original performance numbers. > > > -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org