beliefer commented on a change in pull request #25172: [SPARK-28412][SQL] ANSI
SQL: OVERLAY function support byte array
URL: https://github.com/apache/spark/pull/25172#discussion_r305319596
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
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@@ -496,19 +509,28 @@ case class Overlay(input: Expression, replace:
Expression, pos: Expression, len:
this(str, replace, pos, Literal.create(-1, IntegerType))
}
- override def dataType: DataType = StringType
+ override def dataType: DataType = input.dataType
override def inputTypes: Seq[AbstractDataType] =
- Seq(StringType, StringType, IntegerType, IntegerType)
+ Seq(input.dataType, replace.dataType, IntegerType, IntegerType)
override def children: Seq[Expression] = input :: replace :: pos :: len ::
Nil
override def nullSafeEval(inputEval: Any, replaceEval: Any, posEval: Any,
lenEval: Any): Any = {
- val inputStr = inputEval.asInstanceOf[UTF8String]
- val replaceStr = replaceEval.asInstanceOf[UTF8String]
- val position = posEval.asInstanceOf[Int]
- val length = lenEval.asInstanceOf[Int]
- Overlay.calculate(inputStr, replaceStr, position, length)
+ input.dataType match {
+ case StringType =>
+ val inputStr = inputEval.asInstanceOf[UTF8String]
+ val replaceStr = replaceEval.asInstanceOf[UTF8String]
+ val position = posEval.asInstanceOf[Int]
+ val length = lenEval.asInstanceOf[Int]
Review comment:
OK. A beautiful code.
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