mirror of https://github.com/postgres/postgres
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
3.0 KiB
97 lines
3.0 KiB
CREATE EXTENSION refint;
|
|
|
|
create table pkeys (pkey1 int4 not null, pkey2 text not null);
|
|
create table fkeys (fkey1 int4, fkey2 text, fkey3 int);
|
|
create table fkeys2 (fkey21 int4, fkey22 text, pkey23 int not null);
|
|
|
|
create index fkeys_i on fkeys (fkey1, fkey2);
|
|
create index fkeys2_i on fkeys2 (fkey21, fkey22);
|
|
create index fkeys2p_i on fkeys2 (pkey23);
|
|
|
|
insert into pkeys values (10, '1');
|
|
insert into pkeys values (20, '2');
|
|
insert into pkeys values (30, '3');
|
|
insert into pkeys values (40, '4');
|
|
insert into pkeys values (50, '5');
|
|
insert into pkeys values (60, '6');
|
|
create unique index pkeys_i on pkeys (pkey1, pkey2);
|
|
|
|
--
|
|
-- For fkeys:
|
|
-- (fkey1, fkey2) --> pkeys (pkey1, pkey2)
|
|
-- (fkey3) --> fkeys2 (pkey23)
|
|
--
|
|
create trigger check_fkeys_pkey_exist
|
|
after insert or update on fkeys
|
|
for each row
|
|
execute function
|
|
check_primary_key ('fkey1', 'fkey2', 'pkeys', 'pkey1', 'pkey2');
|
|
|
|
create trigger check_fkeys_pkey2_exist
|
|
after insert or update on fkeys
|
|
for each row
|
|
execute function check_primary_key ('fkey3', 'fkeys2', 'pkey23');
|
|
|
|
--
|
|
-- For fkeys2:
|
|
-- (fkey21, fkey22) --> pkeys (pkey1, pkey2)
|
|
--
|
|
create trigger check_fkeys2_pkey_exist
|
|
after insert or update on fkeys2
|
|
for each row
|
|
execute procedure
|
|
check_primary_key ('fkey21', 'fkey22', 'pkeys', 'pkey1', 'pkey2');
|
|
|
|
--
|
|
-- For pkeys:
|
|
-- ON DELETE/UPDATE (pkey1, pkey2) CASCADE:
|
|
-- fkeys (fkey1, fkey2) and fkeys2 (fkey21, fkey22)
|
|
--
|
|
create trigger check_pkeys_fkey_cascade
|
|
after delete or update on pkeys
|
|
for each row
|
|
execute procedure
|
|
check_foreign_key (2, 'cascade', 'pkey1', 'pkey2',
|
|
'fkeys', 'fkey1', 'fkey2', 'fkeys2', 'fkey21', 'fkey22');
|
|
|
|
--
|
|
-- For fkeys2:
|
|
-- ON DELETE/UPDATE (pkey23) RESTRICT:
|
|
-- fkeys (fkey3)
|
|
--
|
|
create trigger check_fkeys2_fkey_restrict
|
|
after delete or update on fkeys2
|
|
for each row
|
|
execute procedure check_foreign_key (1, 'restrict', 'pkey23', 'fkeys', 'fkey3');
|
|
|
|
insert into fkeys2 values (10, '1', 1);
|
|
insert into fkeys2 values (30, '3', 2);
|
|
insert into fkeys2 values (40, '4', 5);
|
|
insert into fkeys2 values (50, '5', 3);
|
|
-- no key in pkeys
|
|
insert into fkeys2 values (70, '5', 3);
|
|
|
|
insert into fkeys values (10, '1', 2);
|
|
insert into fkeys values (30, '3', 3);
|
|
insert into fkeys values (40, '4', 2);
|
|
insert into fkeys values (50, '5', 2);
|
|
-- no key in pkeys
|
|
insert into fkeys values (70, '5', 1);
|
|
-- no key in fkeys2
|
|
insert into fkeys values (60, '6', 4);
|
|
|
|
delete from pkeys where pkey1 = 30 and pkey2 = '3';
|
|
delete from pkeys where pkey1 = 40 and pkey2 = '4';
|
|
update pkeys set pkey1 = 7, pkey2 = '70' where pkey1 = 50 and pkey2 = '5';
|
|
update pkeys set pkey1 = 7, pkey2 = '70' where pkey1 = 10 and pkey2 = '1';
|
|
|
|
SELECT trigger_name, event_manipulation, event_object_schema, event_object_table,
|
|
action_order, action_condition, action_orientation, action_timing,
|
|
action_reference_old_table, action_reference_new_table
|
|
FROM information_schema.triggers
|
|
WHERE event_object_table in ('pkeys', 'fkeys', 'fkeys2')
|
|
ORDER BY trigger_name COLLATE "C", 2;
|
|
|
|
DROP TABLE pkeys;
|
|
DROP TABLE fkeys;
|
|
DROP TABLE fkeys2;
|
|
|