CREATE TABLE testnode (node integer, nodename text, PRIMARY KEY (node));
CREATE TABLE traffic (id SERIAL, node integer NOT NULL, ts TIMESTAMP(0) WITH TIME ZONE NOT NULL, msg text);
INSERT INTO testnode SELECT s, 'node number ' || s FROM generate_series(1,25) s;
INSERT INTO traffic (id, node, ts, msg) SELECT s, 11, 'epoch'::timestamptz + s * '1 second'::interval, null FROM generate_series(1,9999999) s;

ALTER TABLE traffic ADD CONSTRAINT traffic_node_fkey FOREIGN KEY (node) REFERENCES testnode (node) ON UPDATE RESTRICT ON DELETE RESTRICT;
CREATE INDEX traffic_node_idx ON traffic (node);


BEGIN;
EXPLAIN ANALYSE DELETE FROM testnode WHERE node=9;
ROLLBACK;

BEGIN;
EXPLAIN ANALYSE DELETE FROM testnode WHERE node=11;
ROLLBACK;