dongjoon-hyun commented on a change in pull request #28392:
URL: https://github.com/apache/spark/pull/28392#discussion_r417070637
##########
File path: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
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@@ -3425,6 +3425,28 @@ class SQLQuerySuite extends QueryTest with
SharedSparkSession with AdaptiveSpark
assert(SQLConf.get.getConf(SQLConf.CODEGEN_FALLBACK) === true)
}
}
+
+ test("SPARK-31594: Do not display the seed of rand/randn with no argument in
output schema") {
+ def checkIfSeedExistsInExplain(df: DataFrame): Unit = {
+ val output = new java.io.ByteArrayOutputStream()
+ Console.withOut(output) {
+ df.explain()
+ }
+ output.toString.matches("""randn?\(-?[0-9]+\)""")
+ }
+ val df1 = sql("SELECT rand()")
+ assert(df1.schema.head.name === "rand()")
+ checkIfSeedExistsInExplain(df1)
Review comment:
If we add `assert` at line 3435, this test will fail.
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