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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2017/03/16 13:14:41 UTC
[jira] [Commented] (SPARK-19515) `flat` property in
`ExpressionEncoder` needs documentation
[ https://issues.apache.org/jira/browse/SPARK-19515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15927995#comment-15927995 ]
Hyukjin Kwon commented on SPARK-19515:
--------------------------------------
I guess there are so many instances related with this. This is even an internal API - https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/package.scala#L23-L24.
It does not require a JIRA for minor changes.
> `flat` property in `ExpressionEncoder` needs documentation
> ----------------------------------------------------------
>
> Key: SPARK-19515
> URL: https://issues.apache.org/jira/browse/SPARK-19515
> Project: Spark
> Issue Type: Documentation
> Components: Documentation
> Affects Versions: 2.1.0
> Reporter: Simeon H.K. Fitch
> Priority: Minor
>
> It would be helpful to understand the semantics of the `flat` property in `ExpressionEncoder`, as this is the entry-point into implementing custom `Encoder`s for dataframes.
> [Source code location|https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala#L221]
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