Hyukjin Kwon created SPARK-16044:
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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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