Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/7115#discussion_r33548391
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala
---
@@ -310,3 +312,28 @@ case class StringLength(child: Expression) extends
UnaryExpression with ExpectsI
defineCodeGen(ctx, ev, c => s"($c).length()")
}
}
+
+/**
+ * A function that return soundex name of a ID
+ */
+case class SoundEx(child: Expression) extends UnaryExpression with
ExpectsInputTypes{
+ val so = new Soundex
+ override def dataType: DataType = StringType
+ override def expectedChildTypes: Seq[DataType] = Seq(StringType)
+ override def eval(input: InternalRow): Any = {
+ val string = child.eval(input)
+ if (string == null) null
+ else {
+ val str: java.lang.String = string.toString
+ so.encode(str)
+
+ }
+ }
+
+ override def toString: String = s"SoundEx($child)"
--- End diff --
Remove the `toString` as it will be proper handled by case class.
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