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CREATE EXTENSION autoinc;
create sequence aitest_seq increment 10 start 0 minvalue 0;
create table aitest (
price_id int4,
price_val int4,
price_on int4
);
create trigger aiserial
before insert or update on aitest
for each row
execute procedure
autoinc (price_on, aitest_seq);
insert into aitest values (1, 1, null);
insert into aitest values (2, 2, 0);
insert into aitest values (3, 3, 1);
select * from aitest;
update aitest set price_on = 11;
select * from aitest;
update aitest set price_on = 0;
select * from aitest;
update aitest set price_on = null;
select * from aitest;
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