Provided by: postgresql-client-8.4_8.4.11-1_amd64 bug

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.