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---
--- test creation of SERIAL column
---
CREATE TABLE serialTest (f1 text, f2 serial);
NOTICE: CREATE TABLE will create implicit sequence "serialtest_f2_seq" for serial column "serialtest.f2"
INSERT INTO serialTest VALUES ('foo');
INSERT INTO serialTest VALUES ('bar');
INSERT INTO serialTest VALUES ('force', 100);
INSERT INTO serialTest VALUES ('wrong', NULL);
ERROR: null value in column "f2" violates not-null constraint
SELECT * FROM serialTest;
f1 | f2
-------+-----
foo | 1
bar | 2
force | 100
(3 rows)
-- basic sequence operations using both text and oid references
CREATE SEQUENCE sequence_test;
SELECT nextval('sequence_test'::text);
nextval
---------
1
(1 row)
SELECT nextval('sequence_test'::regclass);
nextval
---------
2
(1 row)
SELECT currval('sequence_test'::text);
currval
---------
2
(1 row)
SELECT currval('sequence_test'::regclass);
currval
---------
2
(1 row)
SELECT setval('sequence_test'::text, 32);
setval
--------
32
(1 row)
SELECT nextval('sequence_test'::regclass);
nextval
---------
33
(1 row)
SELECT setval('sequence_test'::text, 99, false);
setval
--------
99
(1 row)
SELECT nextval('sequence_test'::regclass);
nextval
---------
99
(1 row)
SELECT setval('sequence_test'::regclass, 32);
setval
--------
32
(1 row)
SELECT nextval('sequence_test'::text);
nextval
---------
33
(1 row)
SELECT setval('sequence_test'::regclass, 99, false);
setval
--------
99
(1 row)
SELECT nextval('sequence_test'::text);
nextval
---------
99
(1 row)
DROP SEQUENCE sequence_test;
-- renaming sequences
CREATE SEQUENCE foo_seq;
ALTER TABLE foo_seq RENAME TO foo_seq_new;
SELECT * FROM foo_seq_new;
sequence_name | last_value | increment_by | max_value | min_value | cache_value | log_cnt | is_cycled | is_called
---------------+------------+--------------+---------------------+-----------+-------------+---------+-----------+-----------
foo_seq | 1 | 1 | 9223372036854775807 | 1 | 1 | 1 | f | f
(1 row)
DROP SEQUENCE foo_seq_new;
-- renaming serial sequences
ALTER TABLE serialtest_f2_seq RENAME TO serialtest_f2_foo;
INSERT INTO serialTest VALUES ('more');
SELECT * FROM serialTest;
f1 | f2
-------+-----
foo | 1
bar | 2
force | 100
more | 3
(4 rows)
--
-- Check dependencies of serial and ordinary sequences
--
CREATE TEMP SEQUENCE myseq2;
CREATE TEMP SEQUENCE myseq3;
CREATE TEMP TABLE t1 (
f1 serial,
f2 int DEFAULT nextval('myseq2'),
f3 int DEFAULT nextval('myseq3'::text)
);
NOTICE: CREATE TABLE will create implicit sequence "t1_f1_seq" for serial column "t1.f1"
-- Both drops should fail, but with different error messages:
DROP SEQUENCE t1_f1_seq;
NOTICE: default for table t1 column f1 depends on sequence t1_f1_seq
ERROR: cannot drop sequence t1_f1_seq because other objects depend on it
HINT: Use DROP ... CASCADE to drop the dependent objects too.
DROP SEQUENCE myseq2;
NOTICE: default for table t1 column f2 depends on sequence myseq2
ERROR: cannot drop sequence myseq2 because other objects depend on it
HINT: Use DROP ... CASCADE to drop the dependent objects too.
-- This however will work:
DROP SEQUENCE myseq3;
DROP TABLE t1;
-- Fails because no longer existent:
DROP SEQUENCE t1_f1_seq;
ERROR: sequence "t1_f1_seq" does not exist
-- Now OK:
DROP SEQUENCE myseq2;
--
-- Alter sequence
--
CREATE SEQUENCE sequence_test2 START WITH 32;
SELECT nextval('sequence_test2');
nextval
---------
32
(1 row)
ALTER SEQUENCE sequence_test2 RESTART WITH 16
INCREMENT BY 4 MAXVALUE 22 MINVALUE 5 CYCLE;
SELECT nextval('sequence_test2');
nextval
---------
16
(1 row)
SELECT nextval('sequence_test2');
nextval
---------
20
(1 row)
SELECT nextval('sequence_test2');
nextval
---------
5
(1 row)
-- Test comments
COMMENT ON SEQUENCE asdf IS 'won''t work';
ERROR: relation "asdf" does not exist
COMMENT ON SEQUENCE sequence_test2 IS 'will work';
COMMENT ON SEQUENCE sequence_test2 IS NULL;
-- Test lastval()
CREATE SEQUENCE seq;
SELECT nextval('seq');
nextval
---------
1
(1 row)
SELECT lastval();
lastval
---------
1
(1 row)
SELECT setval('seq', 99);
setval
--------
99
(1 row)
SELECT lastval();
lastval
---------
99
(1 row)
CREATE SEQUENCE seq2;
SELECT nextval('seq2');
nextval
---------
1
(1 row)
SELECT lastval();
lastval
---------
1
(1 row)
DROP SEQUENCE seq2;
-- should fail
SELECT lastval();
ERROR: lastval is not yet defined in this session
CREATE USER seq_user;
BEGIN;
SET LOCAL SESSION AUTHORIZATION seq_user;
CREATE SEQUENCE seq3;
SELECT nextval('seq3');
nextval
---------
1
(1 row)
REVOKE ALL ON seq3 FROM seq_user;
SELECT lastval();
ERROR: permission denied for sequence seq3
ROLLBACK;
DROP USER seq_user;
DROP SEQUENCE seq;
|
