alamb commented on issue #15872:
URL: https://github.com/apache/datafusion/issues/15872#issuecomment-3254229568

   I think the error is pretty clear -- regexp_match, despite its name, returns 
the actual *match* (the list of matches) 
   
   We could probably add some sort of automatic coercion from List --> boolean 
by applying `r IS NOT NULL AND list_length(r) > 0)` perhaps
   
   but I am not sure that would be standards compliant


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