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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
.
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');