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|
-- predictability
SET synchronous_commit = on;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
CREATE SEQUENCE test_sequence;
-- test the sequence changes by several nextval() calls
SELECT nextval('test_sequence');
nextval
---------
1
(1 row)
SELECT nextval('test_sequence');
nextval
---------
2
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3
(1 row)
SELECT nextval('test_sequence');
nextval
---------
4
(1 row)
-- test the sequence changes by several ALTER commands
ALTER SEQUENCE test_sequence INCREMENT BY 10;
SELECT nextval('test_sequence');
nextval
---------
14
(1 row)
ALTER SEQUENCE test_sequence START WITH 3000;
ALTER SEQUENCE test_sequence MAXVALUE 10000;
ALTER SEQUENCE test_sequence RESTART WITH 4000;
SELECT nextval('test_sequence');
nextval
---------
4000
(1 row)
-- test the sequence changes by several setval() calls
SELECT setval('test_sequence', 3500);
setval
--------
3500
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3510
(1 row)
SELECT setval('test_sequence', 3500, true);
setval
--------
3500
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3510
(1 row)
SELECT setval('test_sequence', 3500, false);
setval
--------
3500
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3500
(1 row)
-- show results and drop sequence
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
----------------------------------------------------------------------------------------
BEGIN
sequence public.test_sequence: transactional:1 last_value: 1 log_cnt: 0 is_called:0
COMMIT
sequence public.test_sequence: transactional:0 last_value: 33 log_cnt: 0 is_called:1
BEGIN
sequence public.test_sequence: transactional:1 last_value: 4 log_cnt: 0 is_called:1
COMMIT
sequence public.test_sequence: transactional:0 last_value: 334 log_cnt: 0 is_called:1
BEGIN
sequence public.test_sequence: transactional:1 last_value: 14 log_cnt: 32 is_called:1
COMMIT
BEGIN
sequence public.test_sequence: transactional:1 last_value: 14 log_cnt: 0 is_called:1
COMMIT
BEGIN
sequence public.test_sequence: transactional:1 last_value: 4000 log_cnt: 0 is_called:0
COMMIT
sequence public.test_sequence: transactional:0 last_value: 4320 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:0 last_value: 3500 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:0 last_value: 3830 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:0 last_value: 3500 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:0 last_value: 3830 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:0 last_value: 3500 log_cnt: 0 is_called:0
sequence public.test_sequence: transactional:0 last_value: 3820 log_cnt: 0 is_called:1
(24 rows)
DROP SEQUENCE test_sequence;
-- rollback on sequence creation and update
BEGIN;
CREATE SEQUENCE test_sequence;
CREATE TABLE test_table (a INT);
SELECT nextval('test_sequence');
nextval
---------
1
(1 row)
SELECT nextval('test_sequence');
nextval
---------
2
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3
(1 row)
SELECT setval('test_sequence', 3000);
setval
--------
3000
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3001
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3002
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3003
(1 row)
ALTER SEQUENCE test_sequence RESTART WITH 6000;
INSERT INTO test_table VALUES( (SELECT nextval('test_sequence')) );
SELECT nextval('test_sequence');
nextval
---------
6001
(1 row)
ROLLBACK;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
------
(0 rows)
-- rollback on table creation with serial column
BEGIN;
CREATE TABLE test_table (a SERIAL, b INT);
INSERT INTO test_table (b) VALUES (100);
INSERT INTO test_table (b) VALUES (200);
INSERT INTO test_table (b) VALUES (300);
SELECT setval('test_table_a_seq', 3000);
setval
--------
3000
(1 row)
INSERT INTO test_table (b) VALUES (400);
INSERT INTO test_table (b) VALUES (500);
INSERT INTO test_table (b) VALUES (600);
ALTER SEQUENCE test_table_a_seq RESTART WITH 6000;
INSERT INTO test_table (b) VALUES (700);
INSERT INTO test_table (b) VALUES (800);
INSERT INTO test_table (b) VALUES (900);
ROLLBACK;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
------
(0 rows)
-- rollback on table with serial column
CREATE TABLE test_table (a SERIAL, b INT);
BEGIN;
INSERT INTO test_table (b) VALUES (100);
INSERT INTO test_table (b) VALUES (200);
INSERT INTO test_table (b) VALUES (300);
SELECT setval('test_table_a_seq', 3000);
setval
--------
3000
(1 row)
INSERT INTO test_table (b) VALUES (400);
INSERT INTO test_table (b) VALUES (500);
INSERT INTO test_table (b) VALUES (600);
ALTER SEQUENCE test_table_a_seq RESTART WITH 6000;
INSERT INTO test_table (b) VALUES (700);
INSERT INTO test_table (b) VALUES (800);
INSERT INTO test_table (b) VALUES (900);
ROLLBACK;
-- check table and sequence values after rollback
SELECT * from test_table_a_seq;
last_value | log_cnt | is_called
------------+---------+-----------
3003 | 30 | t
(1 row)
SELECT nextval('test_table_a_seq');
nextval
---------
3004
(1 row)
DROP TABLE test_table;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
-------------------------------------------------------------------------------------------
BEGIN
sequence public.test_table_a_seq: transactional:1 last_value: 1 log_cnt: 0 is_called:0
COMMIT
sequence public.test_table_a_seq: transactional:0 last_value: 33 log_cnt: 0 is_called:1
sequence public.test_table_a_seq: transactional:0 last_value: 3000 log_cnt: 0 is_called:1
sequence public.test_table_a_seq: transactional:0 last_value: 3033 log_cnt: 0 is_called:1
(6 rows)
-- savepoint test on table with serial column
BEGIN;
CREATE TABLE test_table (a SERIAL, b INT);
INSERT INTO test_table (b) VALUES (100);
INSERT INTO test_table (b) VALUES (200);
SAVEPOINT a;
INSERT INTO test_table (b) VALUES (300);
ROLLBACK TO SAVEPOINT a;
DROP TABLE test_table;
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
-----------------------------------------------------------------------------------------
BEGIN
sequence public.test_table_a_seq: transactional:1 last_value: 1 log_cnt: 0 is_called:0
sequence public.test_table_a_seq: transactional:1 last_value: 33 log_cnt: 0 is_called:1
table public.test_table: INSERT: a[integer]:1 b[integer]:100
table public.test_table: INSERT: a[integer]:2 b[integer]:200
COMMIT
(6 rows)
-- savepoint test on table with serial column
BEGIN;
CREATE SEQUENCE test_sequence;
SELECT nextval('test_sequence');
nextval
---------
1
(1 row)
SELECT setval('test_sequence', 3000);
setval
--------
3000
(1 row)
SELECT nextval('test_sequence');
nextval
---------
3001
(1 row)
SAVEPOINT a;
ALTER SEQUENCE test_sequence START WITH 7000;
SELECT setval('test_sequence', 5000);
setval
--------
5000
(1 row)
ROLLBACK TO SAVEPOINT a;
SELECT * FROM test_sequence;
last_value | log_cnt | is_called
------------+---------+-----------
3001 | 32 | t
(1 row)
DROP SEQUENCE test_sequence;
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
----------------------------------------------------------------------------------------
BEGIN
sequence public.test_sequence: transactional:1 last_value: 1 log_cnt: 0 is_called:0
sequence public.test_sequence: transactional:1 last_value: 33 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:1 last_value: 3000 log_cnt: 0 is_called:1
sequence public.test_sequence: transactional:1 last_value: 3033 log_cnt: 0 is_called:1
COMMIT
(6 rows)
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
|
