Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7743#discussion_r35727686
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala ---
@@ -489,6 +492,16 @@ class ColumnExpressionSuite extends QueryTest {
)
}
+ test("InputFileName") {
+ withTempPath { dir =>
+ val data = sqlContext.sparkContext.parallelize(0 to 1000).toDF("id")
--- End diff --
also it might make sense to have a test case that reads two parquet files
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