Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21537#discussion_r195628609
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
---
@@ -720,31 +719,36 @@ case class Cast(child: Expression, dataType:
DataType, timeZoneId: Option[String
private def writeMapToStringBuilder(
kt: DataType,
vt: DataType,
- map: String,
- buffer: String,
- ctx: CodegenContext): String = {
+ map: ExprValue,
+ buffer: ExprValue,
+ ctx: CodegenContext): Block = {
def dataToStringFunc(func: String, dataType: DataType) = {
val funcName = ctx.freshName(func)
val dataToStringCode = castToStringCode(dataType, ctx)
+ val data = JavaCode.variable("data", dataType)
+ val dataStr = JavaCode.variable("dataStr", StringType)
ctx.addNewFunction(funcName,
--- End diff --
Maybe we can consider this in follow-ups.
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