2000-01-05 18:32:29 +01:00
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--
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-- TRIGGERS
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--
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1997-09-11 11:14:12 +02:00
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create table pkeys (pkey1 int4 not null, pkey2 text not null);
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create table fkeys (fkey1 int4, fkey2 text, fkey3 int);
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create table fkeys2 (fkey21 int4, fkey22 text, pkey23 int not null);
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create index fkeys_i on fkeys (fkey1, fkey2);
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create index fkeys2_i on fkeys2 (fkey21, fkey22);
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create index fkeys2p_i on fkeys2 (pkey23);
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insert into pkeys values (10, '1');
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insert into pkeys values (20, '2');
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insert into pkeys values (30, '3');
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insert into pkeys values (40, '4');
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insert into pkeys values (50, '5');
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insert into pkeys values (60, '6');
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create unique index pkeys_i on pkeys (pkey1, pkey2);
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--
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-- For fkeys:
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-- (fkey1, fkey2) --> pkeys (pkey1, pkey2)
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-- (fkey3) --> fkeys2 (pkey23)
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--
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create trigger check_fkeys_pkey_exist
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before insert or update on fkeys
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for each row
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execute procedure
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check_primary_key ('fkey1', 'fkey2', 'pkeys', 'pkey1', 'pkey2');
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create trigger check_fkeys_pkey2_exist
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before insert or update on fkeys
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for each row
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execute procedure check_primary_key ('fkey3', 'fkeys2', 'pkey23');
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--
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-- For fkeys2:
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-- (fkey21, fkey22) --> pkeys (pkey1, pkey2)
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--
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create trigger check_fkeys2_pkey_exist
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before insert or update on fkeys2
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for each row
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execute procedure
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check_primary_key ('fkey21', 'fkey22', 'pkeys', 'pkey1', 'pkey2');
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2003-11-21 23:32:49 +01:00
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-- Test comments
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COMMENT ON TRIGGER check_fkeys2_pkey_bad ON fkeys2 IS 'wrong';
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COMMENT ON TRIGGER check_fkeys2_pkey_exist ON fkeys2 IS 'right';
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COMMENT ON TRIGGER check_fkeys2_pkey_exist ON fkeys2 IS NULL;
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1997-09-11 11:14:12 +02:00
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--
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-- For pkeys:
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-- ON DELETE/UPDATE (pkey1, pkey2) CASCADE:
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-- fkeys (fkey1, fkey2) and fkeys2 (fkey21, fkey22)
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--
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create trigger check_pkeys_fkey_cascade
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before delete or update on pkeys
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for each row
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execute procedure
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check_foreign_key (2, 'cascade', 'pkey1', 'pkey2',
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'fkeys', 'fkey1', 'fkey2', 'fkeys2', 'fkey21', 'fkey22');
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--
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-- For fkeys2:
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-- ON DELETE/UPDATE (pkey23) RESTRICT:
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-- fkeys (fkey3)
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--
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create trigger check_fkeys2_fkey_restrict
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before delete or update on fkeys2
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for each row
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execute procedure check_foreign_key (1, 'restrict', 'pkey23', 'fkeys', 'fkey3');
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insert into fkeys2 values (10, '1', 1);
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insert into fkeys2 values (30, '3', 2);
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insert into fkeys2 values (40, '4', 5);
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insert into fkeys2 values (50, '5', 3);
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-- no key in pkeys
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insert into fkeys2 values (70, '5', 3);
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insert into fkeys values (10, '1', 2);
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insert into fkeys values (30, '3', 3);
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insert into fkeys values (40, '4', 2);
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insert into fkeys values (50, '5', 2);
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-- no key in pkeys
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insert into fkeys values (70, '5', 1);
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-- no key in fkeys2
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insert into fkeys values (60, '6', 4);
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delete from pkeys where pkey1 = 30 and pkey2 = '3';
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delete from pkeys where pkey1 = 40 and pkey2 = '4';
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update pkeys set pkey1 = 7, pkey2 = '70' where pkey1 = 50 and pkey2 = '5';
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update pkeys set pkey1 = 7, pkey2 = '70' where pkey1 = 10 and pkey2 = '1';
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DROP TABLE pkeys;
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DROP TABLE fkeys;
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DROP TABLE fkeys2;
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1999-09-29 18:06:40 +02:00
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-- -- I've disabled the funny_dup17 test because the new semantics
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-- -- of AFTER ROW triggers, which get now fired at the end of a
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2002-11-23 04:59:09 +01:00
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-- -- query always, cause funny_dup17 to enter an endless loop.
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1999-09-29 18:06:40 +02:00
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-- --
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-- -- Jan
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--
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-- create table dup17 (x int4);
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--
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-- create trigger dup17_before
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-- before insert on dup17
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-- for each row
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-- execute procedure
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-- funny_dup17 ()
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-- ;
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--
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-- insert into dup17 values (17);
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-- select count(*) from dup17;
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-- insert into dup17 values (17);
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-- select count(*) from dup17;
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--
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-- drop trigger dup17_before on dup17;
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--
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-- create trigger dup17_after
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-- after insert on dup17
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-- for each row
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-- execute procedure
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-- funny_dup17 ()
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-- ;
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-- insert into dup17 values (13);
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-- select count(*) from dup17 where x = 13;
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-- insert into dup17 values (13);
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-- select count(*) from dup17 where x = 13;
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--
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-- DROP TABLE dup17;
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1997-09-24 10:36:47 +02:00
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create sequence ttdummy_seq increment 10 start 0 minvalue 0;
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create table tttest (
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price_id int4,
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price_val int4,
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1997-10-17 11:59:09 +02:00
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price_on int4,
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1997-09-24 10:36:47 +02:00
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price_off int4 default 999999
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);
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create trigger ttdummy
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before delete or update on tttest
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for each row
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execute procedure
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ttdummy (price_on, price_off);
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1997-10-17 11:59:09 +02:00
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create trigger ttserial
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before insert or update on tttest
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for each row
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execute procedure
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autoinc (price_on, ttdummy_seq);
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insert into tttest values (1, 1, null);
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insert into tttest values (2, 2, null);
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insert into tttest values (3, 3, 0);
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1997-09-24 10:36:47 +02:00
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select * from tttest;
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delete from tttest where price_id = 2;
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select * from tttest;
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-- what do we see ?
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-- get current prices
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select * from tttest where price_off = 999999;
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-- change price for price_id == 3
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update tttest set price_val = 30 where price_id = 3;
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select * from tttest;
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-- now we want to change pric_id in ALL tuples
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-- this gets us not what we need
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update tttest set price_id = 5 where price_id = 3;
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select * from tttest;
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-- restore data as before last update:
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select set_ttdummy(0);
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delete from tttest where price_id = 5;
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update tttest set price_off = 999999 where price_val = 30;
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select * from tttest;
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-- and try change price_id now!
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update tttest set price_id = 5 where price_id = 3;
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select * from tttest;
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-- isn't it what we need ?
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select set_ttdummy(1);
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-- we want to correct some "date"
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update tttest set price_on = -1 where price_id = 1;
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-- but this doesn't work
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-- try in this way
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select set_ttdummy(0);
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update tttest set price_on = -1 where price_id = 1;
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select * from tttest;
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-- isn't it what we need ?
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1997-10-17 11:59:09 +02:00
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-- get price for price_id == 5 as it was @ "date" 35
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select * from tttest where price_on <= 35 and price_off > 35 and price_id = 5;
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1997-09-24 10:36:47 +02:00
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drop table tttest;
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drop sequence ttdummy_seq;
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2002-11-23 04:59:09 +01:00
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--
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-- tests for per-statement triggers
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--
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CREATE TABLE log_table (tstamp timestamp default timeofday()::timestamp);
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CREATE TABLE main_table (a int, b int);
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COPY main_table (a,b) FROM stdin;
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5 10
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20 20
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30 10
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50 35
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80 15
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\.
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2006-02-27 17:09:50 +01:00
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CREATE FUNCTION trigger_func() RETURNS trigger LANGUAGE plpgsql AS '
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2002-11-23 04:59:09 +01:00
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BEGIN
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RAISE NOTICE ''trigger_func() called: action = %, when = %, level = %'', TG_OP, TG_WHEN, TG_LEVEL;
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RETURN NULL;
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END;';
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CREATE TRIGGER before_ins_stmt_trig BEFORE INSERT ON main_table
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FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
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CREATE TRIGGER after_ins_stmt_trig AFTER INSERT ON main_table
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FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
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--
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-- if neither 'FOR EACH ROW' nor 'FOR EACH STATEMENT' was specified,
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-- CREATE TRIGGER should default to 'FOR EACH STATEMENT'
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--
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CREATE TRIGGER before_upd_stmt_trig AFTER UPDATE ON main_table
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EXECUTE PROCEDURE trigger_func();
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CREATE TRIGGER before_upd_row_trig AFTER UPDATE ON main_table
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FOR EACH ROW EXECUTE PROCEDURE trigger_func();
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INSERT INTO main_table DEFAULT VALUES;
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UPDATE main_table SET a = a + 1 WHERE b < 30;
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-- UPDATE that effects zero rows should still call per-statement trigger
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UPDATE main_table SET a = a + 2 WHERE b > 100;
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-- COPY should fire per-row and per-statement INSERT triggers
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COPY main_table (a, b) FROM stdin;
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30 40
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50 60
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\.
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2002-11-23 19:13:22 +01:00
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SELECT * FROM main_table ORDER BY a, b;
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2005-08-30 20:57:48 +02:00
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-- Test enable/disable triggers
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create table trigtest (i serial primary key);
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-- test that disabling RI triggers works
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create table trigtest2 (i int references trigtest(i) on delete cascade);
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create function trigtest() returns trigger as $$
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begin
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raise notice '% % % %', TG_RELNAME, TG_OP, TG_WHEN, TG_LEVEL;
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return new;
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end;$$ language plpgsql;
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create trigger trigtest_b_row_tg before insert or update or delete on trigtest
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for each row execute procedure trigtest();
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create trigger trigtest_a_row_tg after insert or update or delete on trigtest
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for each row execute procedure trigtest();
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create trigger trigtest_b_stmt_tg before insert or update or delete on trigtest
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for each statement execute procedure trigtest();
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create trigger trigtest_a_stmt_tg after insert or update or delete on trigtest
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for each statement execute procedure trigtest();
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insert into trigtest default values;
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alter table trigtest disable trigger trigtest_b_row_tg;
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insert into trigtest default values;
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alter table trigtest disable trigger user;
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insert into trigtest default values;
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alter table trigtest enable trigger trigtest_a_stmt_tg;
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insert into trigtest default values;
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insert into trigtest2 values(1);
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insert into trigtest2 values(2);
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delete from trigtest where i=2;
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select * from trigtest2;
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alter table trigtest disable trigger all;
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delete from trigtest where i=1;
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select * from trigtest2;
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-- ensure we still insert, even when all triggers are disabled
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insert into trigtest default values;
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select * from trigtest;
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drop table trigtest2;
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drop table trigtest;
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2006-05-28 05:03:17 +02:00
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-- dump trigger data
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CREATE TABLE trigger_test (
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i int,
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v varchar
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);
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CREATE OR REPLACE FUNCTION trigger_data() RETURNS trigger
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LANGUAGE plpgsql AS $$
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declare
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argstr text;
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relid text;
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begin
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relid := TG_relid::regclass;
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2006-05-28 05:12:00 +02:00
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-- plpgsql can't discover its trigger data in a hash like perl and python
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2006-05-28 05:03:17 +02:00
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-- can, or by a sort of reflection like tcl can,
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-- so we have to hard code the names.
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raise NOTICE 'TG_NAME: %', TG_name;
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raise NOTICE 'TG_WHEN: %', TG_when;
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raise NOTICE 'TG_LEVEL: %', TG_level;
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raise NOTICE 'TG_OP: %', TG_op;
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raise NOTICE 'TG_RELID::regclass: %', relid;
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raise NOTICE 'TG_RELNAME: %', TG_relname;
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raise NOTICE 'TG_TABLE_NAME: %', TG_table_name;
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raise NOTICE 'TG_TABLE_SCHEMA: %', TG_table_schema;
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raise NOTICE 'TG_NARGS: %', TG_nargs;
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argstr := '[';
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for i in 0 .. TG_nargs - 1 loop
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if i > 0 then
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argstr := argstr || ', ';
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end if;
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argstr := argstr || TG_argv[i];
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end loop;
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argstr := argstr || ']';
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raise NOTICE 'TG_ARGV: %', argstr;
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if TG_OP != 'INSERT' then
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raise NOTICE 'OLD: %', OLD;
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end if;
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if TG_OP != 'DELETE' then
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raise NOTICE 'NEW: %', NEW;
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end if;
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2006-05-28 05:12:00 +02:00
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2006-05-28 05:03:17 +02:00
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if TG_OP = 'DELETE' then
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return OLD;
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else
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return NEW;
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end if;
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end;
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$$;
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CREATE TRIGGER show_trigger_data_trig
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BEFORE INSERT OR UPDATE OR DELETE ON trigger_test
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FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
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insert into trigger_test values(1,'insert');
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update trigger_test set v = 'update' where i = 1;
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delete from trigger_test;
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DROP TRIGGER show_trigger_data_trig on trigger_test;
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DROP FUNCTION trigger_data();
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DROP TABLE trigger_test;
|
2006-06-26 19:24:41 +02:00
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|
--
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|
-- Test use of row comparisons on OLD/NEW
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--
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CREATE TABLE trigger_test (f1 int, f2 text, f3 text);
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|
|
-- this is the obvious (and wrong...) way to compare rows
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|
CREATE FUNCTION mytrigger() RETURNS trigger LANGUAGE plpgsql as $$
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|
|
begin
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|
|
if row(old.*) = row(new.*) then
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|
raise notice 'row % not changed', new.f1;
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|
else
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|
|
raise notice 'row % changed', new.f1;
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|
end if;
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|
|
return new;
|
|
|
|
end$$;
|
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|
|
CREATE TRIGGER t
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|
|
BEFORE UPDATE ON trigger_test
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|
|
FOR EACH ROW EXECUTE PROCEDURE mytrigger();
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|
|
INSERT INTO trigger_test VALUES(1, 'foo', 'bar');
|
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|
|
INSERT INTO trigger_test VALUES(2, 'baz', 'quux');
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|
|
UPDATE trigger_test SET f3 = 'bar';
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|
|
UPDATE trigger_test SET f3 = NULL;
|
|
|
|
-- this demonstrates that the above isn't really working as desired:
|
|
|
|
UPDATE trigger_test SET f3 = NULL;
|
|
|
|
|
|
|
|
-- the right way when considering nulls is
|
|
|
|
CREATE OR REPLACE FUNCTION mytrigger() RETURNS trigger LANGUAGE plpgsql as $$
|
|
|
|
begin
|
|
|
|
if row(old.*) is distinct from row(new.*) then
|
|
|
|
raise notice 'row % changed', new.f1;
|
|
|
|
else
|
|
|
|
raise notice 'row % not changed', new.f1;
|
|
|
|
end if;
|
|
|
|
return new;
|
|
|
|
end$$;
|
|
|
|
|
|
|
|
UPDATE trigger_test SET f3 = 'bar';
|
|
|
|
UPDATE trigger_test SET f3 = NULL;
|
|
|
|
UPDATE trigger_test SET f3 = NULL;
|
|
|
|
|
|
|
|
DROP TABLE trigger_test;
|
|
|
|
|
|
|
|
DROP FUNCTION mytrigger();
|
2008-11-03 21:17:21 +01:00
|
|
|
|
|
|
|
|
|
|
|
-- minimal update trigger
|
|
|
|
|
|
|
|
CREATE TABLE min_updates_test (
|
|
|
|
f1 text,
|
|
|
|
f2 int,
|
|
|
|
f3 int);
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
CREATE TABLE min_updates_test_oids (
|
|
|
|
f1 text,
|
|
|
|
f2 int,
|
|
|
|
f3 int) WITH OIDS;
|
|
|
|
|
2008-11-03 21:17:21 +01:00
|
|
|
INSERT INTO min_updates_test VALUES ('a',1,2),('b','2',null);
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
INSERT INTO min_updates_test_oids VALUES ('a',1,2),('b','2',null);
|
|
|
|
|
2008-11-03 21:17:21 +01:00
|
|
|
CREATE TRIGGER z_min_update
|
|
|
|
BEFORE UPDATE ON min_updates_test
|
|
|
|
FOR EACH ROW EXECUTE PROCEDURE suppress_redundant_updates_trigger();
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
CREATE TRIGGER z_min_update
|
|
|
|
BEFORE UPDATE ON min_updates_test_oids
|
|
|
|
FOR EACH ROW EXECUTE PROCEDURE suppress_redundant_updates_trigger();
|
|
|
|
|
2008-11-03 21:17:21 +01:00
|
|
|
\set QUIET false
|
|
|
|
|
|
|
|
UPDATE min_updates_test SET f1 = f1;
|
|
|
|
|
|
|
|
UPDATE min_updates_test SET f2 = f2 + 1;
|
|
|
|
|
|
|
|
UPDATE min_updates_test SET f3 = 2 WHERE f3 is null;
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
UPDATE min_updates_test_oids SET f1 = f1;
|
|
|
|
|
|
|
|
UPDATE min_updates_test_oids SET f2 = f2 + 1;
|
|
|
|
|
|
|
|
UPDATE min_updates_test_oids SET f3 = 2 WHERE f3 is null;
|
|
|
|
|
2008-11-03 21:17:21 +01:00
|
|
|
\set QUIET true
|
|
|
|
|
|
|
|
SELECT * FROM min_updates_test;
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
SELECT * FROM min_updates_test_oids;
|
|
|
|
|
2008-11-03 21:17:21 +01:00
|
|
|
DROP TABLE min_updates_test;
|
|
|
|
|
2008-11-05 19:49:28 +01:00
|
|
|
DROP TABLE min_updates_test_oids;
|
|
|
|
|