--- --- 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) -- test smallserial / bigserial CREATE TABLE serialTest2 (f1 text, f2 serial, f3 smallserial, f4 serial2, f5 bigserial, f6 serial8); NOTICE: CREATE TABLE will create implicit sequence "serialtest2_f2_seq" for serial column "serialtest2.f2" NOTICE: CREATE TABLE will create implicit sequence "serialtest2_f3_seq" for serial column "serialtest2.f3" NOTICE: CREATE TABLE will create implicit sequence "serialtest2_f4_seq" for serial column "serialtest2.f4" NOTICE: CREATE TABLE will create implicit sequence "serialtest2_f5_seq" for serial column "serialtest2.f5" NOTICE: CREATE TABLE will create implicit sequence "serialtest2_f6_seq" for serial column "serialtest2.f6" INSERT INTO serialTest2 (f1) VALUES ('test_defaults'); INSERT INTO serialTest2 (f1, f2, f3, f4, f5, f6) VALUES ('test_max_vals', 2147483647, 32767, 32767, 9223372036854775807, 9223372036854775807), ('test_min_vals', -2147483648, -32768, -32768, -9223372036854775808, -9223372036854775808); -- All these INSERTs should fail: INSERT INTO serialTest2 (f1, f3) VALUES ('bogus', -32769); ERROR: smallint out of range INSERT INTO serialTest2 (f1, f4) VALUES ('bogus', -32769); ERROR: smallint out of range INSERT INTO serialTest2 (f1, f3) VALUES ('bogus', 32768); ERROR: smallint out of range INSERT INTO serialTest2 (f1, f4) VALUES ('bogus', 32768); ERROR: smallint out of range INSERT INTO serialTest2 (f1, f5) VALUES ('bogus', -9223372036854775809); ERROR: bigint out of range INSERT INTO serialTest2 (f1, f6) VALUES ('bogus', -9223372036854775809); ERROR: bigint out of range INSERT INTO serialTest2 (f1, f5) VALUES ('bogus', 9223372036854775808); ERROR: bigint out of range INSERT INTO serialTest2 (f1, f6) VALUES ('bogus', 9223372036854775808); ERROR: bigint out of range SELECT * FROM serialTest2 ORDER BY f2 ASC; f1 | f2 | f3 | f4 | f5 | f6 ---------------+-------------+--------+--------+----------------------+---------------------- test_min_vals | -2147483648 | -32768 | -32768 | -9223372036854775808 | -9223372036854775808 test_defaults | 1 | 1 | 1 | 1 | 1 test_max_vals | 2147483647 | 32767 | 32767 | 9223372036854775807 | 9223372036854775807 (3 rows) SELECT nextval('serialTest2_f2_seq'); nextval --------- 2 (1 row) SELECT nextval('serialTest2_f3_seq'); nextval --------- 2 (1 row) SELECT nextval('serialTest2_f4_seq'); nextval --------- 2 (1 row) SELECT nextval('serialTest2_f5_seq'); nextval --------- 2 (1 row) SELECT nextval('serialTest2_f6_seq'); nextval --------- 2 (1 row) -- 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 | start_value | increment_by | max_value | min_value | cache_value | log_cnt | is_cycled | is_called ---------------+------------+-------------+--------------+---------------------+-----------+-------------+---------+-----------+----------- foo_seq | 1 | 1 | 1 | 9223372036854775807 | 1 | 1 | 1 | f | f (1 row) SELECT nextval('foo_seq_new'); nextval --------- 1 (1 row) SELECT nextval('foo_seq_new'); nextval --------- 2 (1 row) SELECT * FROM foo_seq_new; sequence_name | last_value | start_value | increment_by | max_value | min_value | cache_value | log_cnt | is_cycled | is_called ---------------+------------+-------------+--------------+---------------------+-----------+-------------+---------+-----------+----------- foo_seq | 2 | 1 | 1 | 9223372036854775807 | 1 | 1 | 31 | f | t (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; ERROR: cannot drop sequence t1_f1_seq because other objects depend on it DETAIL: default for table t1 column f1 depends on sequence t1_f1_seq HINT: Use DROP ... CASCADE to drop the dependent objects too. DROP SEQUENCE myseq2; ERROR: cannot drop sequence myseq2 because other objects depend on it DETAIL: default for table t1 column f2 depends on sequence myseq2 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 24 INCREMENT BY 4 MAXVALUE 36 MINVALUE 5 CYCLE; SELECT nextval('sequence_test2'); nextval --------- 24 (1 row) SELECT nextval('sequence_test2'); nextval --------- 28 (1 row) SELECT nextval('sequence_test2'); nextval --------- 32 (1 row) SELECT nextval('sequence_test2'); nextval --------- 36 (1 row) SELECT nextval('sequence_test2'); nextval --------- 5 (1 row) ALTER SEQUENCE sequence_test2 RESTART; SELECT nextval('sequence_test2'); nextval --------- 32 (1 row) SELECT nextval('sequence_test2'); nextval --------- 36 (1 row) SELECT nextval('sequence_test2'); nextval --------- 5 (1 row) -- Information schema SELECT * FROM information_schema.sequences WHERE sequence_name IN ('sequence_test2', 'serialtest2_f2_seq', 'serialtest2_f3_seq', 'serialtest2_f4_seq', 'serialtest2_f5_seq', 'serialtest2_f6_seq') ORDER BY sequence_name ASC; sequence_catalog | sequence_schema | sequence_name | data_type | numeric_precision | numeric_precision_radix | numeric_scale | start_value | minimum_value | maximum_value | increment | cycle_option ------------------+-----------------+--------------------+-----------+-------------------+-------------------------+---------------+-------------+---------------+---------------------+-----------+-------------- regression | public | sequence_test2 | bigint | 64 | 2 | 0 | 32 | 5 | 36 | 4 | YES regression | public | serialtest2_f2_seq | bigint | 64 | 2 | 0 | 1 | 1 | 9223372036854775807 | 1 | NO regression | public | serialtest2_f3_seq | bigint | 64 | 2 | 0 | 1 | 1 | 9223372036854775807 | 1 | NO regression | public | serialtest2_f4_seq | bigint | 64 | 2 | 0 | 1 | 1 | 9223372036854775807 | 1 | NO regression | public | serialtest2_f5_seq | bigint | 64 | 2 | 0 | 1 | 1 | 9223372036854775807 | 1 | NO regression | public | serialtest2_f6_seq | bigint | 64 | 2 | 0 | 1 | 1 | 9223372036854775807 | 1 | NO (6 rows) -- 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; -- Sequences should get wiped out as well: DROP TABLE serialTest, serialTest2; -- Make sure sequences are gone: SELECT * FROM information_schema.sequences WHERE sequence_name IN ('sequence_test2', 'serialtest2_f2_seq', 'serialtest2_f3_seq', 'serialtest2_f4_seq', 'serialtest2_f5_seq', 'serialtest2_f6_seq') ORDER BY sequence_name ASC; sequence_catalog | sequence_schema | sequence_name | data_type | numeric_precision | numeric_precision_radix | numeric_scale | start_value | minimum_value | maximum_value | increment | cycle_option ------------------+-----------------+----------------+-----------+-------------------+-------------------------+---------------+-------------+---------------+---------------+-----------+-------------- regression | public | sequence_test2 | bigint | 64 | 2 | 0 | 32 | 5 | 36 | 4 | YES (1 row) DROP USER seq_user; DROP SEQUENCE seq;