Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/10498#discussion_r48747698
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
---
@@ -177,3 +179,36 @@ case class Crc32(child: Expression) extends
UnaryExpression with ImplicitCastInp
})
}
}
+
+case class Murmur3Hash(children: Seq[Expression], seed: Int) extends
Expression {
+ def this(arguments: Seq[Expression]) = this(arguments, 42)
+
+ override def dataType: DataType = IntegerType
+
+ override def foldable: Boolean = children.forall(_.foldable)
+
+ override def nullable: Boolean = false
+
+ override def checkInputDataTypes(): TypeCheckResult = {
+ if (children.isEmpty) {
+ TypeCheckResult.TypeCheckFailure("arguments of function hash cannot
be empty")
--- End diff --
Nit: hash => Murmur3Hash
---
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