DISCARD
7
SQL - Language Statements
DISCARD
discard session state
DISCARD
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.