ALTER DATABASE name SET variable { TO | = } { value | DEFAULT }
ALTER DATABASE name RESET variable
ALTER DATABASE is used to change the session default of a run-time configuration variable for a PostgreSQL database. Whenever a new session is subsequently started in that database, the specified value becomes the session default value. The database-specific default overrides whatever setting is present in postgresql.conf or has been received from the postmaster.
Only a superuser or the database owner can change the session defaults for a database.
The name of the database whose session defaults are to be altered.
Set the session default for this database of the specified configuration variable to the given value. If value is DEFAULT or, equivalently, RESET is used, the database-specific variable setting is removed and the system-wide default setting will be inherited in new sessions. Use RESET ALL to clear all settings.
See SET and the Administrator's Guide for more information about allowed variable names and values.
Message returned if the alteration was successful.
Error message returned if the specified database is not known to the system.
Using ALTER USER, it is also possible to tie a session default to a specific user rather than a database. User-specific settings override database-specific ones if there is a conflict.