Github user nongli commented on a diff in the pull request:
https://github.com/apache/spark/pull/10435#discussion_r48301376
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
---
@@ -161,3 +163,197 @@ case class Crc32(child: Expression) extends
UnaryExpression with ImplicitCastInp
})
}
}
+
+/**
+ * A function that calculates hash value for a group of expressions.
+ */
+case class Hash(children: Seq[Expression]) extends Expression {
--- End diff --
Is it possible to remove the code duplication with
BaseGenericInternalRow.hashCode?
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