uros-db commented on code in PR #45856:
URL: https://github.com/apache/spark/pull/45856#discussion_r1550949300
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala:
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@@ -543,25 +543,52 @@ case class RLike(left: Expression, right: Expression)
extends StringRegexExpress
case class StringSplit(str: Expression, regex: Expression, limit: Expression)
extends TernaryExpression with ImplicitCastInputTypes with NullIntolerant {
- override def dataType: DataType = ArrayType(StringType, containsNull = false)
- override def inputTypes: Seq[DataType] = Seq(StringType, StringType,
IntegerType)
+ override def dataType: DataType = ArrayType(str.dataType, containsNull =
false)
+ override def inputTypes: Seq[AbstractDataType] =
+ Seq(StringTypeAnyCollation, StringTypeAnyCollation, IntegerType)
+
+ override def checkInputDataTypes(): TypeCheckResult = str.dataType match {
+ case s: StringType =>
+ if (s.supportsBinaryEquality || s.isUTF8BinaryLcaseCollation) {
+ super.checkInputDataTypes()
+ } else {
+ TypeCheckFailure("Unsupported collation: " +
+ CollationFactory.fetchCollation(s.collationId).collationName)
+ }
+ case _ => super.checkInputDataTypes()
+ }
+
override def first: Expression = str
override def second: Expression = regex
override def third: Expression = limit
+ private def collationId = str.dataType.asInstanceOf[StringType].collationId
+ private def binarySplit =
CollationFactory.fetchCollation(collationId).supportsBinaryEquality
+
def this(exp: Expression, regex: Expression) = this(exp, regex, Literal(-1))
override def nullSafeEval(string: Any, regex: Any, limit: Any): Any = {
- val strings = string.asInstanceOf[UTF8String].split(
- regex.asInstanceOf[UTF8String], limit.asInstanceOf[Int])
+ val strings = if (binarySplit) {
+ string.asInstanceOf[UTF8String].split(
+ regex.asInstanceOf[UTF8String], limit.asInstanceOf[Int])
+ } else {
+ string.asInstanceOf[UTF8String].splitCaseInsensitive(
+ regex.asInstanceOf[UTF8String], limit.asInstanceOf[Int])
Review Comment:
I don't think branching here is a good idea
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