AngersZhuuuu commented on a change in pull request #30946:
URL: https://github.com/apache/spark/pull/30946#discussion_r549727329
##########
File path:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveScriptTransformationSuite.scala
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@@ -501,4 +501,28 @@ class HiveScriptTransformationSuite extends
BaseScriptTransformationSuite with T
""".stripMargin)
checkAnswer(query4, identity, Row(null) :: Nil)
}
+
+ test("SPARK-32684: Script transform hive serde mode null format is same with
hive as '\\N'") {
+ val query1 = sql(
+ """
+ |SELECT TRANSFORM(null, null, null)
+ |USING 'cat'
+ |FROM (SELECT 1 AS a, 2 AS b, 3 AS c) t
+ """.stripMargin)
+ checkAnswer(query1, identity, Row(null, "\\N\t\\N") :: Nil)
+
+ val query2 = sql(
+ """
+ |SELECT TRANSFORM(null, null, null)
+ | ROW FORMAT SERDE
'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
+ |USING 'cat'
+ | ROW FORMAT SERDE
'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
+ | WITH SERDEPROPERTIES (
+ | 'serialization.last.column.takes.rest' = 'true'
Review comment:
> Why do we need this conf in this test?
Use schemaless mode and use this value to make `value` column take all rest
data and show the `\\N`, or it will just show `null`.
Need to change to other way to show `\\N`
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