Re: Differentiate between system commands and user commands

<radha.manohar@ndsu.nodak.edu> writes:
> I would like to know how postgresql differentiates between the SQL
> commands that are
> entered by the user and the SQL commands that are executed internally by
> the system
> (for eg, to check the permissions of the user etc)?

There are no such "internal SQL commands".  Permissions checking is
hard-coded in C in the backend.

            regards, tom lane