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CURRENT_USER
Return the user currently subject to permission checking, which may or may not be the same user who initiated the session.
CURRENT_USER | USER
For example:
premdb=# \c premdb yellowbrick
You are now connected to database "premdb" as user "yellowbrick".
premdb=# select current_user;
current_user
--------------
yellowbrick
(1 row)
USER
is a synonym for CURRENT_USER
.
Parent topic:System Functions