Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
DISCARD(7)		 PostgreSQL 17.5 Documentation		    DISCARD(7)

NAME
       DISCARD - discard session state

SYNOPSIS
       DISCARD { ALL | PLANS | SEQUENCES | TEMPORARY | TEMP }

DESCRIPTION
       DISCARD releases	internal resources associated with a database session.
       This command is useful for partially or fully resetting the session's
       state. There are	several	subcommands to release different types of
       resources; the DISCARD ALL variant subsumes all the others, and also
       resets additional state.

PARAMETERS
       PLANS
	   Releases all	cached query plans, forcing re-planning	to occur the
	   next	time the associated prepared statement is used.

       SEQUENCES
	   Discards all	cached sequence-related	state, including
	   currval()/lastval() information and any preallocated	sequence
	   values that have not	yet been returned by nextval().	(See CREATE
	   SEQUENCE (CREATE_SEQUENCE(7)) for a description of preallocated
	   sequence values.)

       TEMPORARY or TEMP
	   Drops all temporary tables created in the current session.

       ALL
	   Releases all	temporary resources associated with the	current
	   session and resets the session to its initial state.	Currently,
	   this	has the	same effect as executing the following sequence	of
	   statements:

	       CLOSE ALL;
	       SET SESSION AUTHORIZATION DEFAULT;
	       RESET ALL;
	       DEALLOCATE ALL;
	       UNLISTEN	*;
	       SELECT pg_advisory_unlock_all();
	       DISCARD PLANS;
	       DISCARD TEMP;
	       DISCARD SEQUENCES;

NOTES
       DISCARD ALL cannot be executed inside a transaction block.

COMPATIBILITY
       DISCARD is a PostgreSQL extension.

PostgreSQL 17.5			     2025			    DISCARD(7)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=DISCARD&sektion=7&manpath=FreeBSD+Ports+14.3.quarterly>

home | help