amaliujia commented on a change in pull request #35352:
URL: https://github.com/apache/spark/pull/35352#discussion_r833879755
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
##########
@@ -2943,3 +2943,73 @@ case class Sentences(
copy(str = newFirst, language = newSecond, country = newThird)
}
+
+/**
+ * Splits a given string by a specified delimiter and return splits into a
Review comment:
Done. Hope my words clarify it.
##########
File path:
common/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
##########
@@ -999,13 +1000,27 @@ public static UTF8String concatWs(UTF8String separator,
UTF8String... inputs) {
}
public UTF8String[] split(UTF8String pattern, int limit) {
+ return split(pattern.toString(), limit);
+ }
+
+ public UTF8String[] splitSQL(UTF8String delimiter, int limit) {
+ // if delimiter is empty string, skip the regex based splitting directly
as regex
+ // treats empty string as matching anything, thus use the input directly.
+ if (delimiter.numBytes() == 0) {
+ return new UTF8String[]{this};
+ } else {
+ return split(Pattern.quote(delimiter.toString()), limit);
Review comment:
Done. Hope my words clarify it.
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