SET SESSION RUNTIMECAP

Sets the maximum amount of time queries and stored procedures can run in a given session.

Sets the maximum amount of time queries and stored procedures can run in a given session. If a query or stored procedure exceeds its session's RUNTIMECAP, Vertica terminates it and returns an error. You cannot increase the RUNTIMECAP beyond the limit that is set in your user profile.

Syntax

SET SESSION RUNTIMECAP duration

Parameters

duration
Specifies how long a given query can run in the current session, one of the following:

  • NONE (default): Removes a runtime limit for all current session queries.

  • 'interval': Specifies as an interval the maximum runtime for current session queries, up to one year—for example, 1 minute or 100 seconds.

  • =DEFAULT: Sets maximum runtime for queries in this session to the user's RUNTIMECAP value.

Privileges

  • Superusers can increase session RUNTIMECAP to any value.

  • Non-superusers can only set the session RUNTIMECAP to a value equal to or lower than their own user RUNTIMECAP.

Examples

Set the maximum query runtime for the current session to 10 minutes:

=> SET SESSION RUNTIMECAP '10 minutes';

Revert the session RUNTIMECAP to your user default setting:

=> SET SESSION RUNTIMECAP =DEFAULT;
SET
=> SHOW RUNTIMECAP;
    name    |  setting
------------+-----------
 runtimecap | UNLIMITED
(1 row)

Set the RUNTIMECAP to 1 SECOND and run an anonymous procedure with an infinite loop:

=> SET SESSION RUNTIMECAP '1 SECOND';
SET

=> DO $$
BEGIN
    LOOP
    END LOOP;
END;
$$;

ERROR 0:  Query exceeded maximum runtime
HINT:  Change the maximum runtime using SET SESSION RUNTIMECAP

See also