Santiago M. Mola created SPARK-8654:
---------------------------------------
Summary: Analysis exception when using "NULL IN (...)": invalid
cast
Key: SPARK-8654
URL: https://issues.apache.org/jira/browse/SPARK-8654
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Santiago M. Mola
Priority: Minor
The following query throws an analysis exception:
{code}
SELECT * FROM t WHERE NULL NOT IN (1, 2, 3);
{code}
The exception is:
{code}
org.apache.spark.sql.AnalysisException: invalid cast from int to null;
at
org.apache.spark.sql.catalyst.analysis.CheckAnalysis$class.failAnalysis(CheckAnalysis.scala:38)
at
org.apache.spark.sql.catalyst.analysis.Analyzer.failAnalysis(Analyzer.scala:42)
at
org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1$$anonfun$apply$2.applyOrElse(CheckAnalysis.scala:66)
at
org.apache.spark.sql.catalyst.analysis.CheckAnalysis$$anonfun$checkAnalysis$1$$anonfun$apply$2.applyOrElse(CheckAnalysis.scala:52)
{code}
Here is a test that can be added to AnalysisSuite to check the issue:
{code}
test("SPARK-XXXX regression test") {
val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(2))),
"a")() :: Nil,
LocalRelation()
)
caseInsensitiveAnalyze(plan)
}
{code}
Note that this kind of query is a corner case, but it is still valid SQL. An
expression such as "NULL IN (...)" or "NULL NOT IN (...)" always gives NULL as
a result, even if the list contains NULL. So it is safe to translate these
expressions to Literal(null) during analysis.
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