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Posted to issues@spark.apache.org by "Weichen Xu (JIRA)" <ji...@apache.org> on 2019/04/23 21:21:00 UTC
[jira] [Commented] (SPARK-27534) Do not load `content` column in
binary data source if it is not selected
[ https://issues.apache.org/jira/browse/SPARK-27534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16824554#comment-16824554 ]
Weichen Xu commented on SPARK-27534:
------------------------------------
I am working on this. :)
> Do not load `content` column in binary data source if it is not selected
> ------------------------------------------------------------------------
>
> Key: SPARK-27534
> URL: https://issues.apache.org/jira/browse/SPARK-27534
> Project: Spark
> Issue Type: Story
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Xiangrui Meng
> Assignee: Weichen Xu
> Priority: Major
>
> A follow-up task from SPARK-25348. To save I/O cost, Spark shouldn't attempt to read the file if users didn't request the `content` column. For example:
> {code}
> spark.read.format("binaryFile").load(path).filter($"length" < 1000000).count()
> {code}
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