[jira] [Commented] (SPARK-16126) Better Error Message When using DataFrameReader without `path`

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

    [ https://issues.apache.org/jira/browse/SPARK-16126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15343798#comment-15343798 ] 

Apache Spark commented on SPARK-16126:
--------------------------------------

User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/13837

> Better Error Message When using DataFrameReader without `path`
> --------------------------------------------------------------
>
>                 Key: SPARK-16126
>                 URL: https://issues.apache.org/jira/browse/SPARK-16126
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Xiao Li
>
> When users do not specify the path in `DataFrameReader` APIs, it can get a confusing error message. For example, 
> {noformat}
> spark.read.json()
> {noformat}
> Error message:
> {noformat}
> Unable to infer schema for JSON at . It must be specified manually;
> {noformat}
> After the fix, the error message will be like: 
> {noformat}
> 'path' is not specified
> {noformat}
> Another major goal of this PR is to add test cases for the latest changes in https://github.com/apache/spark/pull/13727. 
> - orc read APIs
> - illegal format name
> - save API - empty path or illegal path
> - load API - empty path
> - illegal compression
> - fixed a test case in the existing test case `prevent all column partitioning`



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