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Posted to issues@spark.apache.org by "Wenchen Fan (JIRA)" <ji...@apache.org> on 2016/09/29 15:32:21 UTC
[jira] [Commented] (SPARK-17725) Spark should not write out parquet
files with schema containing non-nullable fields
[ https://issues.apache.org/jira/browse/SPARK-17725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15533097#comment-15533097 ]
Wenchen Fan commented on SPARK-17725:
-------------------------------------
cc [~yhuai] [~liancheng]
> Spark should not write out parquet files with schema containing non-nullable fields
> -----------------------------------------------------------------------------------
>
> Key: SPARK-17725
> URL: https://issues.apache.org/jira/browse/SPARK-17725
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Wenchen Fan
>
> Since Spark 1.3, after PR https://github.com/apache/spark/pull/4826 , Spark SQL will always set all schema fields to nullable before writing out parquet files, to make the data pipeline more robust.
> However, this behaviour has been changed in 2.0 accidently by PR https://github.com/apache/spark/pull/11509
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