Jim Nasby <jim.na...@bluetreble.com> writes:
> Is there a place in the error reporting path where we'd still have 
> access to the 'is' token, and have enough control to look for a relevant 
> function?

No.  The grammar can't assume that it's being run inside a transaction
(consider parsing START TRANSACTION, or ROLLBACK after a failure).
So catalog access is out, full stop.

                        regards, tom lane


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