[jira] [Created] (SPARK-24007) EqualNullSafe for FloatType and DoubleType might generate a wrong result by codegen.

["Takuya Ueshin (JIRA)" <ji...@apache.org>]

Takuya Ueshin created SPARK-24007:
-------------------------------------

             Summary: EqualNullSafe for FloatType and DoubleType might generate a wrong result by codegen.
                 Key: SPARK-24007
                 URL: https://issues.apache.org/jira/browse/SPARK-24007
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.3.0, 2.2.1, 2.1.2, 2.0.2
            Reporter: Takuya Ueshin


{{EqualNullSafe}} for {{FloatType}} and {{DoubleType}} might generate a wrong result by codegen.

{noformat}
scala> val df = Seq((Some(-1.0d), None), (None, Some(-1.0d))).toDF()
df: org.apache.spark.sql.DataFrame = [_1: double, _2: double]

scala> df.show()
+----+----+
|  _1|  _2|
+----+----+
|-1.0|null|
|null|-1.0|
+----+----+


scala> df.filter("_1 <=> _2").show()
+----+----+
|  _1|  _2|
+----+----+
|-1.0|null|
|null|-1.0|
+----+----+
{noformat}

The result should be empty but the result remains two rows.




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