Github user adrian-wang commented on a diff in the pull request:
https://github.com/apache/spark/pull/1151#discussion_r14060166
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
---
@@ -369,6 +369,17 @@ class SQLQuerySuite extends QueryTest {
(3, null)))
}
+ test("subtract") {
+ checkAnswer(
+ sql("SELECT * FROM lowerCaseData SUBTRACT SELECT * FROM
upperCaseData "),
+ (1, "a") ::
+ (2, "b") ::
+ (3, "c") ::
+ 4, "d") :: Nil)
--- End diff --
Maybe you missed a '(' here
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