RESET restores run-time parameters to their default values. RESET is an alternative spelling for
SET configuration_parameter TO DEFAULT
Refer to SET(7) for details.
The default value is defined as the value that the parameter would have had, if no SET had ever been
issued for it in the current session. The actual source of this value might be a compiled-in default, the
configuration file, command-line options, or per-database or per-user default settings. This is subtly
different from defining it as “the value that the parameter had at session start”, because if the value
came from the configuration file, it will be reset to whatever is specified by the configuration file
now. See Chapter 19 for details.
The transactional behavior of RESET is the same as SET: its effects will be undone by transaction
rollback.