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.