PRAGMA defer_foreign_keys;
PRAGMA foreign_keys=ON;
CREATE TABLE t1(x INTEGER PRIMARY KEY);
CREATE TABLE t2(y INTEGER PRIMARY KEY,
z INTEGER REFERENCES t1(x) DEFERRABLE INITIALLY DEFERRED);
CREATE INDEX t2z ON t2(z);
CREATE TABLE t3(u INTEGER PRIMARY KEY, v INTEGER REFERENCES t1(x));
CREATE INDEX t3v ON t3(v);
INSERT INTO t1 VALUES(1),(2),(3),(4),(5);
INSERT INTO t2 VALUES(1,1),(2,2);
INSERT INTO t3 VALUES(3,3),(4,4);
PRAGMA defer_foreign_keys;
ROLLBACK;
PRAGMA defer_foreign_keys;
BEGIN;
PRAGMA defer_foreign_keys=ON;
PRAGMA defer_foreign_keys;
COMMIT;
PRAGMA defer_foreign_keys;
BEGIN;
CREATE TABLE p1(a PRIMARY KEY);
INSERT INTO p1 VALUES('one'), ('two');
CREATE TABLE c1(x REFERENCES p1);
INSERT INTO c1 VALUES('two'), ('one');
BEGIN;
PRAGMA defer_foreign_keys = 1;
DELETE FROM p1;
ROLLBACK;
PRAGMA defer_foreign_keys;
BEGIN;
PRAGMA defer_foreign_keys = 1;
DROP TABLE p1;
PRAGMA vdbe_trace = 0;
ROLLBACK;
PRAGMA defer_foreign_keys;
BEGIN;
PRAGMA defer_foreign_keys = 1;
DELETE FROM p1;
DROP TABLE c1;
COMMIT;
PRAGMA defer_foreign_keys;
DROP TABLE p1;
CREATE TABLE p1(a PRIMARY KEY);
INSERT INTO p1 VALUES('one'), ('two');
CREATE TABLE c1(x REFERENCES p1);
INSERT INTO c1 VALUES('two'), ('one');
BEGIN;
PRAGMA defer_foreign_keys = 1;
INSERT INTO c1 VALUES('three');
DROP TABLE c1;
COMMIT;
PRAGMA defer_foreign_keys;
CREATE TABLE p2(a PRIMARY KEY, b);
CREATE TABLE c2(x, y REFERENCES p2 ON DELETE RESTRICT ON UPDATE RESTRICT);
INSERT INTO p2 VALUES(1, 'one');
INSERT INTO p2 VALUES(2, 'two');
INSERT INTO c2 VALUES('i', 1);
COMMIT
BEGIN;
PRAGMA defer_foreign_keys = 1;
UPDATE p2 SET a=a-1;
COMMIT;
BEGIN;
PRAGMA defer_foreign_keys = 1;
UPDATE p2 SET a=a-1;
ROLLBACK
CREATE TRIGGER p2t AFTER DELETE ON p2 BEGIN
INSERT INTO p2 VALUES(old.a, 'deleted!');
END;
COMMIT
BEGIN;
PRAGMA defer_foreign_keys = 1;
DELETE FROM p2 WHERE a=1;
COMMIT;
SELECT * FROM p2;