Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7115#discussion_r33907699
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala
---
@@ -301,6 +303,27 @@ case class StringLength(child: Expression) extends
UnaryExpression with ExpectsI
}
/**
+ * A function that return soundex code of the given string expression.
+ */
+case class SoundEx(child: Expression) extends UnaryExpression with
ExpectsInputTypes {
+ @transient lazy val so = new Soundex
+
+ override def dataType: DataType = StringType
+
+ override def inputTypes: Seq[DataType] = Seq(StringType)
+
+ override def eval(input: InternalRow): Any = {
+ val string = child.eval(input)
+ if (string == null) {
+ null
+ } else {
+ val str: String = string.toString
+ UTF8String.fromString(so.encode(str))
--- End diff --
also can you copy the body of common codec's soundex function into
UTF8String?
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