switching between users in postgres


SET SESSION AUTHORIZATION

SET [ SESSION | LOCAL ] SESSION AUTHORIZATION username
SET [ SESSION | LOCAL ] SESSION AUTHORIZATION DEFAULT
RESET SESSION AUTHORIZATION

 This command sets the session user identifier and the current user identifier of the current SQL session to be username. The user name may be written as either an identifier or a string literal. Using this command, it is possible, for example, to temporarily become an unprivileged user and later switch back to being a superuser.
Example:

 C:\WINDOWS\system32>psql -U postgres
psql (10.11)
WARNING: Console code page (437) differs from Windows code page (1252)
         8-bit characters might not work correctly. See psql reference
         page "Notes for Windows users" for details.
Type "help" for help.

postgres=# select current_user,session_user;
 current_user | session_user
--------------+--------------
 postgres     | postgres
(1 row)


postgres=# set session authorization 'ATEST';
SET

postgres=> select current_user,session_user;
 current_user | session_user
--------------+--------------
 ATEST        | ATEST
(1 row)

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