Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/23035#discussion_r233695765
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
---
@@ -2554,4 +2554,34 @@ class DataFrameSuite extends QueryTest with
SharedSQLContext {
checkAnswer(swappedDf.filter($"key"($"map") > "a"), Row(2, Map(2 ->
"b")))
}
+
+ test("SPARK-26057: attribute deduplication on already analyzed plans") {
+ withTempView("cc", "p", "c") {
--- End diff --
if we don't care about naming, how about `a, b, c` instead of `cc, p, c`?
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