On 7/5/19 1:55 PM, PegoraroF10 wrote:
- Because we don´t need to give rigths to user on sequences;
- Nobody will change values of pk fields, because we would like to have
GENERATE ALWAYS on those PK Fields.
An IDENTITY column is still backed by a sequence:
create table identity_test(id integer PRIMARY KEY GENERATED BY DEFAULT
AS IDENTITY);
\ds identity_test_id_seq
List of relations
Schema | Name | Type | Owner
--------+----------------------+----------+---------
public | identity_test_id_seq | sequence | aklaver
You end up with same thing as using a sequence(with some additional
syntax over its behavior):
create table seq_id_test(id integer PRIMARY KEY);
create sequence seq_id_test_seq AS integer OWNED BY seq_id_test.id;
\ds seq_id_test_seq
List of relations
Schema | Name | Type | Owner
--------+-----------------+----------+---------
public | seq_id_test_seq | sequence | aklaver
Rights are the same:
\c - production
You are now connected to database "test" as user "production".
test_(production)> insert into identity_test (id) values(default);
ERROR: permission denied for table identity_test
test_(production)> insert into seq_id_test (id) values(default);
ERROR: permission denied for table seq_id_test
A user can change the PK by using OVERRIDING SYSTEM VALUE in an INSERT.
--
Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
