[jira] [Commented] (SPARK-15983) Remove FileFormat.prepareRead

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-15983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15333141#comment-15333141 ] 

Apache Spark commented on SPARK-15983:
--------------------------------------

User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/13698

> Remove FileFormat.prepareRead
> -----------------------------
>
>                 Key: SPARK-15983
>                 URL: https://issues.apache.org/jira/browse/SPARK-15983
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Cheng Lian
>            Assignee: Cheng Lian
>
> Interface method {{FileFormat.prepareRead()}} was added in [PR #12088|https://github.com/apache/spark/pull/12088] to handle a special case in the LibSVM data source.
> However, the semantics of this interface method isn't intuitive: it returns a modified version of the data source options map. Considering that the LibSVM case can be easily handled using schema metadata inside {{inferSchema}}, we can remove this interface method to keep the {{FileFormat}} interface clean.



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