nanookclaw commented on PR #22284:
URL: https://github.com/apache/datafusion/pull/22284#issuecomment-4543833234

   It looks stale on current `main` rather than a code change needed in this 
PR. Before opening this I checked the reported query against current `main` and 
it already returned PostgreSQL's expected result (`true` for 
`regexp_like(E'a\nb', '^b', 'm')`).
   
   So this PR is intentionally regression coverage only: it locks the multiline 
`m` behavior in both SQL logic tests and the Rust scalar/array paths. I did not 
trace the exact commit that fixed the originally reported mismatch; it may have 
been corrected by another regex-path change between #22268 being filed and this 
PR.
   
   If coverage-only is not useful here, I'm fine closing it.
   


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