Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13990#discussion_r69393130
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -393,3 +393,73 @@ case class CreateNamedStructUnsafe(children:
Seq[Expression]) extends Expression
override def prettyName: String = "named_struct_unsafe"
}
+
+/**
+ * Creates a map after splitting the input text into key/value pairs using
delimeters
+ */
+@ExpressionDescription(
+ usage = """_FUNC_(text[, pairDelim, keyValueDelim]) - Creates a map
after splitting the text into
+ key/value pairs using delimiters.
+ Default delimiters are ',' for pairDelim and '=' for keyValueDelim.""")
+case class StringToMap(child: Expression, pairDelim: Expression,
keyValueDelim: Expression)
+ extends TernaryExpression with ExpectsInputTypes {
+
+ def this(child: Expression) = {
+ this(child, Literal(","), Literal("="))
+ }
+
+ override def children: Seq[Expression] = Seq(child, pairDelim,
keyValueDelim)
+
+ override def inputTypes: Seq[AbstractDataType] = Seq(StringType,
StringType, StringType)
--- End diff --
Does hive allow non-literal delimiter? e.g. `str_to_map(text, d1, d2)`
while `d1` and `d2` are table columms
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