dblink_cancel_query - Man Page

dblink_cancel_query(text connname) returns text

dblink_cancel_query attempts to cancel any query that is in progress on the named connection​. Note that this is not certain to succeed (since, for example, the remote query might already have finished)​. A cancel request simply improves the odds that the query will fail soon​. You must still complete the normal query protocol, for example by calling dblink_get_result​.

connname

Name of the connection to use​.

Returns OK if the cancel request has been sent, or the text of an error message on failure​.

SELECT dblink_cancel_query('dtest1');