Github user animeshbaranawal commented on a diff in the pull request:
https://github.com/apache/spark/pull/7149#discussion_r33654307
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
---
@@ -730,4 +730,11 @@ class DataFrameSuite extends QueryTest {
val res11 = ctx.range(-1).select("id")
assert(res11.count == 0)
}
+
+ test("SPARK-8621: support empty string column name") {
+ val df = Seq(Tuple1(1)).toDF("").as("t")
+ // We should allow empty string as column name
+ df.col("")
+ df.col("t.``")
--- End diff --
This line is also giving some error , mainly "AnalysisException: cannot
resolve 't.``' given input columns ;"
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