uros-db commented on code in PR #45216:
URL: https://github.com/apache/spark/pull/45216#discussion_r1504086524
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:
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@@ -622,10 +646,24 @@ object StartsWithExpressionBuilder extends
StringBinaryPredicateExpressionBuilde
}
}
-case class StartsWith(left: Expression, right: Expression) extends
StringPredicate {
- override def compare(l: UTF8String, r: UTF8String): Boolean = l.startsWith(r)
+case class StartsWith(left: Expression, right: Expression) extends
StringPredicate
+ with CollationCheck {
+ override def compare(l: UTF8String, r: UTF8String): Boolean = {
+ val collationId = checkCollationIds()
+ if (CollationFactory.fetchCollation(collationId).isBinaryCollation) {
+ l.startsWith(r)
Review Comment:
Going with:
(old / current implementation - binary collations only)
`containsBinary(substring)`
(new implementation - can be used for all collations) `contains(substring,
collationId)`
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