RESET variable
RESET ALL
The name of a run-time parameter. See SET for a list.
Resets all settable run-time parameters to default values.
RESET restores run-time parameters to their default values. Refer to SET for details. RESET is an alternate spelling for
SET variable TO DEFAULT
The default value is defined as the value that the variable would have had, had no SET ever been issued for it in the current session. The actual source of this value might be a compiled-in default, the postmaster's configuration file or command-line switches, or per-database or per-user default settings. See the Administrator's Guide for details.
See the SET manual page for details on the transaction behavior of RESET.