beliefer edited a comment on issue #27497: [SPARK-30245][SQL][FOLLOWUP] Improve regex expression when pattern not changed URL: https://github.com/apache/spark/pull/27497#issuecomment-583788613 @dongjoon-hyun @HyukjinKwon Yes. maybe we need more performance investigation, but I find `RegExpExtract` and `RegExpReplace` also use this method. https://github.com/apache/spark/blob/e1cd4d9dc25ac3abe33c07686fc2a7d1f2b5c122/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala#L382 https://github.com/apache/spark/blob/e1cd4d9dc25ac3abe33c07686fc2a7d1f2b5c122/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala#L477 I think the pattern string or regex string not too long.
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