fqaiser94 commented on a change in pull request #27066:
URL: https://github.com/apache/spark/pull/27066#discussion_r449353728
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
##########
@@ -539,3 +539,79 @@ case class StringToMap(text: Expression, pairDelim:
Expression, keyValueDelim: E
override def prettyName: String = "str_to_map"
}
+
+/**
+ * Adds/replaces field in struct by name.
+ */
+case class WithFields(
+ structExpr: Expression,
+ names: Seq[String],
+ valExprs: Seq[Expression]) extends Expression {
+
+ assert(names.length == valExprs.length)
+
+ override def checkInputDataTypes(): TypeCheckResult = {
+ if (!structExpr.dataType.isInstanceOf[StructType]) {
+ TypeCheckResult.TypeCheckFailure(
+ "struct argument should be struct type, got: " +
structExpr.dataType.catalogString)
+ } else {
+ TypeCheckResult.TypeCheckSuccess
+ }
+ }
+
+ override def children: Seq[Expression] = structExpr +: valExprs
+
+ private lazy val addOrReplaceExprs = names.zip(valExprs)
+
+ override def dataType: StructType = {
Review comment:
resolved due to comment
[here](https://github.com/apache/spark/pull/27066#discussion_r448719460).
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