ax1s-x1zz commented on PR #11006:
URL: https://github.com/apache/arrow-rs/pull/11006#issuecomment-5594564373

   Thanks for the honest feedback, everyone — I've been thinking about this 
over the weekend and I think you're right.
   
   A key fact I should have surfaced earlier: the DataFusion PR that motivated 
this (#12448) has since been **merged** — it now uses arrow-rs's interval 
parsing for the actual expression evaluation and fixed the `interval '5 day' 
hour` case without needing any bare-unit relaxation here. So the original use 
case this was built for has already been resolved on the DataFusion side, and I 
don't have a concrete downstream consumer that would depend on this behavior.
   
   Given that, plus the points made above (Postgres's parser being 
permissiveness here is arguably a quirk rather than a contract; Spark and 
DuckDB both reject it), I agree this isn't worth broadening the public parser 
for. I'll close this PR as wont-fix.
   
   I'll also ask to close apache/arrow-rs#6390 since the motivating case no 
longer needs it — happy to hear if anyone disagrees, but I don't want to leave 
a stale open issue around it.
   


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