PHILO-HE commented on issue #7866:
URL: 
https://github.com/apache/incubator-gluten/issues/7866#issuecomment-2472981662

   > I remember we have some preprocessing of the pattern before we send to 
re2, which can make more pattern workable on re2. Is the code still there?
   
   @FelixYBW, I just found Velox has such preprocessing for presto: see 
[code](https://github.com/facebookincubator/velox/blob/main/velox/functions/prestosql/RegexpReplace.h#L33).
 And Meituan also proposed a pr to re-use this code for Spark and also make 
some improvement. See https://github.com/facebookincubator/velox/pull/10981.


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