[jira] [Created] (SPARK-16044) input_file_name() returns empty strings in data sources based on NewHadoopRDD.

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

Hyukjin Kwon created SPARK-16044:
------------------------------------

             Summary: input_file_name() returns empty strings in data sources based on NewHadoopRDD.
                 Key: SPARK-16044
                 URL: https://issues.apache.org/jira/browse/SPARK-16044
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.0.0
            Reporter: Hyukjin Kwon


The issue is, {{input_file_name()}} function does not contain file paths when data sources use {{NewHadoopRDD}}. This is currently only supported for {{FileScanRDD}} and {{HadoopRDD}}.

To be clear, this does not affect Spark's internal data sources because currently they all do not use {{NewHadoopRDD}}.

However, there are several datasources using this. For example,
 
spark-redshift - [here|https://github.com/databricks/spark-redshift/blob/cba5eee1ab79ae8f0fa9e668373a54d2b5babf6b/src/main/scala/com/databricks/spark/redshift/RedshiftRelation.scala#L149]
spark-xml - [here|https://github.com/databricks/spark-xml/blob/master/src/main/scala/com/databricks/spark/xml/util/XmlFile.scala#L39-L47]

Currently, using this functions shows the output below:

{code}
+-----------------+
|input_file_name()|
+-----------------+
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
+-----------------+
{code}



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