DISCARD(7)                                                SQL Commands                                                DISCARD(7)



NAME
       DISCARD - discard session state


SYNOPSIS
       DISCARD { ALL | PLANS | TEMPORARY | TEMP }


DESCRIPTION
       DISCARD  releases internal resources associated with a database session. These resources are normally released at the end
       of the session.

       DISCARD TEMP drops all temporary tables created in the current session. DISCARD  PLANS  releases  all  internally  cached
       query  plans.  DISCARD  ALL resets a session to its original state, discarding temporary resources and resetting session-
       local configuration changes.

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

       PLANS  Releases all cached query plans.

       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:

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


NOTES
       DISCARD ALL cannot be executed inside a transaction block.

COMPATIBILITY
       DISCARD is a PostgreSQL extension.



SQL - Language Statements                                  2011-09-22                                                 DISCARD(7)