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mirror of https://github.com/postgres/postgres.git synced 2025-04-21 12:05:57 +03:00
Álvaro Herrera 14e87ffa5c
Add pg_constraint rows for not-null constraints
We now create contype='n' pg_constraint rows for not-null constraints on
user tables.  Only one such constraint is allowed for a column.

We propagate these constraints to other tables during operations such as
adding inheritance relationships, creating and attaching partitions and
creating tables LIKE other tables.  These related constraints mostly
follow the well-known rules of conislocal and coninhcount that we have
for CHECK constraints, with some adaptations: for example, as opposed to
CHECK constraints, we don't match not-null ones by name when descending
a hierarchy to alter or remove it, instead matching by the name of the
column that they apply to.  This means we don't require the constraint
names to be identical across a hierarchy.

The inheritance status of these constraints can be controlled: now we
can be sure that if a parent table has one, then all children will have
it as well.  They can optionally be marked NO INHERIT, and then children
are free not to have one.  (There's currently no support for altering a
NO INHERIT constraint into inheriting down the hierarchy, but that's a
desirable future feature.)

This also opens the door for having these constraints be marked NOT
VALID, as well as allowing UNIQUE+NOT NULL to be used for functional
dependency determination, as envisioned by commit e49ae8d3bc58.  It's
likely possible to allow DEFERRABLE constraints as followup work, as
well.

psql shows these constraints in \d+, though we may want to reconsider if
this turns out to be too noisy.  Earlier versions of this patch hid
constraints that were on the same columns of the primary key, but I'm
not sure that that's very useful.  If clutter is a problem, we might be
better off inventing a new \d++ command and not showing the constraints
in \d+.

For now, we omit these constraints on system catalog columns, because
they're unlikely to achieve anything.

The main difference to the previous attempt at this (b0e96f311985) is
that we now require that such a constraint always exists when a primary
key is in the column; we didn't require this previously which had a
number of unpalatable consequences.  With this requirement, the code is
easier to reason about.  For example:

- We no longer have "throwaway constraints" during pg_dump.  We needed
  those for the case where a table had a PK without a not-null
  underneath, to prevent a slow scan of the data during restore of the
  PK creation, which was particularly problematic for pg_upgrade.

- We no longer have to cope with attnotnull being set spuriously in
  case a primary key is dropped indirectly (e.g., via DROP COLUMN).

Some bits of code in this patch were authored by Jian He.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Author: Bernd Helmle <mailings@oopsware.de>
Reviewed-by: 何建 (jian he) <jian.universality@gmail.com>
Reviewed-by: 王刚 (Tender Wang) <tndrwang@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
Discussion: https://postgr.es/m/202408310358.sdhumtyuy2ht@alvherre.pgsql
2024-11-08 13:28:48 +01:00

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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)
-- fail because of an already existing slot
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ERROR: replication slot "regression_slot" already exists
-- fail because of an invalid name
SELECT 'init' FROM pg_create_logical_replication_slot('Invalid Name', 'test_decoding');
ERROR: replication slot name "Invalid Name" contains invalid character
HINT: Replication slot names may only contain lower case letters, numbers, and the underscore character.
-- fail twice because of an invalid parameter values
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
ERROR: could not parse value "frakbar" for parameter "include-xids"
CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'nonexistent-option', 'frakbar');
ERROR: option "nonexistent-option" = "frakbar" is unknown
CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
ERROR: could not parse value "frakbar" for parameter "include-xids"
CONTEXT: slot "regression_slot", output plugin "test_decoding", in the startup callback
-- succeed once
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
-- fail
SELECT pg_drop_replication_slot('regression_slot');
ERROR: replication slot "regression_slot" does not exist
-- check that we're detecting a streaming rep slot used for logical decoding
SELECT 'init' FROM pg_create_physical_replication_slot('repl');
?column?
----------
init
(1 row)
SELECT data FROM pg_logical_slot_get_changes('repl', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
ERROR: cannot use physical replication slot for logical decoding
SELECT pg_drop_replication_slot('repl');
pg_drop_replication_slot
--------------------------
(1 row)
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
/* check whether status function reports us, only reproduceable columns */
SELECT slot_name, plugin, slot_type, active,
NOT catalog_xmin IS NULL AS catalog_xmin_set,
xmin IS NULl AS data_xmin_not_set,
pg_wal_lsn_diff(restart_lsn, '0/01000000') > 0 AS some_wal
FROM pg_replication_slots;
slot_name | plugin | slot_type | active | catalog_xmin_set | data_xmin_not_set | some_wal
-----------------+---------------+-----------+--------+------------------+-------------------+----------
regression_slot | test_decoding | logical | f | t | t | t
(1 row)
/*
* Check that changes are handled correctly when interleaved with ddl
*/
CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
BEGIN;
INSERT INTO replication_example(somedata, text) VALUES (1, 1);
INSERT INTO replication_example(somedata, text) VALUES (1, 2);
COMMIT;
ALTER TABLE replication_example ADD COLUMN bar int;
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 1, 4);
BEGIN;
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 2, 4);
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 3, 4);
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 4, NULL);
COMMIT;
ALTER TABLE replication_example DROP COLUMN bar;
INSERT INTO replication_example(somedata, text) VALUES (3, 1);
BEGIN;
INSERT INTO replication_example(somedata, text) VALUES (3, 2);
INSERT INTO replication_example(somedata, text) VALUES (3, 3);
COMMIT;
ALTER TABLE replication_example RENAME COLUMN text TO somenum;
INSERT INTO replication_example(somedata, somenum) VALUES (4, 1);
-- collect all changes
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
---------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:'1'
table public.replication_example: INSERT: id[integer]:2 somedata[integer]:1 text[character varying]:'2'
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:3 somedata[integer]:2 text[character varying]:'1' bar[integer]:4
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:4 somedata[integer]:2 text[character varying]:'2' bar[integer]:4
table public.replication_example: INSERT: id[integer]:5 somedata[integer]:2 text[character varying]:'3' bar[integer]:4
table public.replication_example: INSERT: id[integer]:6 somedata[integer]:2 text[character varying]:'4' bar[integer]:null
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:7 somedata[integer]:3 text[character varying]:'1'
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:8 somedata[integer]:3 text[character varying]:'2'
table public.replication_example: INSERT: id[integer]:9 somedata[integer]:3 text[character varying]:'3'
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:10 somedata[integer]:4 somenum[character varying]:'1'
COMMIT
(22 rows)
ALTER TABLE replication_example ALTER COLUMN somenum TYPE int4 USING (somenum::int4);
-- check that this doesn't produce any changes from the heap rewrite
SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
count
-------
0
(1 row)
INSERT INTO replication_example(somedata, somenum) VALUES (5, 1);
BEGIN;
INSERT INTO replication_example(somedata, somenum) VALUES (6, 1);
ALTER TABLE replication_example ADD COLUMN zaphod1 int;
INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 2, 1);
ALTER TABLE replication_example ADD COLUMN zaphod2 int;
INSERT INTO replication_example(somedata, somenum, zaphod2) VALUES (6, 3, 1);
INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 4, 2);
COMMIT;
-- show changes
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
------------------------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_example: INSERT: id[integer]:11 somedata[integer]:5 somenum[integer]:1
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:12 somedata[integer]:6 somenum[integer]:1
table public.replication_example: INSERT: id[integer]:13 somedata[integer]:6 somenum[integer]:2 zaphod1[integer]:1
table public.replication_example: INSERT: id[integer]:14 somedata[integer]:6 somenum[integer]:3 zaphod1[integer]:null zaphod2[integer]:1
table public.replication_example: INSERT: id[integer]:15 somedata[integer]:6 somenum[integer]:4 zaphod1[integer]:2 zaphod2[integer]:null
COMMIT
(9 rows)
-- ON CONFLICT DO UPDATE support
BEGIN;
INSERT INTO replication_example(id, somedata, somenum) SELECT i, i, i FROM generate_series(-15, 15) i
ON CONFLICT (id) DO UPDATE SET somenum = excluded.somenum + 1;
COMMIT;
/* display results */
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
--------------------------------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_example: INSERT: id[integer]:-15 somedata[integer]:-15 somenum[integer]:-15 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-14 somedata[integer]:-14 somenum[integer]:-14 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-13 somedata[integer]:-13 somenum[integer]:-13 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-12 somedata[integer]:-12 somenum[integer]:-12 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-11 somedata[integer]:-11 somenum[integer]:-11 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-10 somedata[integer]:-10 somenum[integer]:-10 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-9 somedata[integer]:-9 somenum[integer]:-9 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-8 somedata[integer]:-8 somenum[integer]:-8 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-7 somedata[integer]:-7 somenum[integer]:-7 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-6 somedata[integer]:-6 somenum[integer]:-6 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-5 somedata[integer]:-5 somenum[integer]:-5 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-4 somedata[integer]:-4 somenum[integer]:-4 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-3 somedata[integer]:-3 somenum[integer]:-3 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-2 somedata[integer]:-2 somenum[integer]:-2 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-1 somedata[integer]:-1 somenum[integer]:-1 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:0 somedata[integer]:0 somenum[integer]:0 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:1 somedata[integer]:1 somenum[integer]:2 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:2 somedata[integer]:1 somenum[integer]:3 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:3 somedata[integer]:2 somenum[integer]:4 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:4 somedata[integer]:2 somenum[integer]:5 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:5 somedata[integer]:2 somenum[integer]:6 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:6 somedata[integer]:2 somenum[integer]:7 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:7 somedata[integer]:3 somenum[integer]:8 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:8 somedata[integer]:3 somenum[integer]:9 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:9 somedata[integer]:3 somenum[integer]:10 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:10 somedata[integer]:4 somenum[integer]:11 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:11 somedata[integer]:5 somenum[integer]:12 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:12 somedata[integer]:6 somenum[integer]:13 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:13 somedata[integer]:6 somenum[integer]:14 zaphod1[integer]:1 zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:14 somedata[integer]:6 somenum[integer]:15 zaphod1[integer]:null zaphod2[integer]:1
table public.replication_example: UPDATE: id[integer]:15 somedata[integer]:6 somenum[integer]:16 zaphod1[integer]:2 zaphod2[integer]:null
COMMIT
(33 rows)
-- MERGE support
BEGIN;
MERGE INTO replication_example t
USING (SELECT i as id, i as data, i as num FROM generate_series(-20, 5) i) s
ON t.id = s.id
WHEN MATCHED AND t.id < 0 THEN
UPDATE SET somenum = somenum + 1
WHEN MATCHED AND t.id >= 0 THEN
DELETE
WHEN NOT MATCHED THEN
INSERT VALUES (s.*);
COMMIT;
/* display results */
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
--------------------------------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_example: INSERT: id[integer]:-20 somedata[integer]:-20 somenum[integer]:-20 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-19 somedata[integer]:-19 somenum[integer]:-19 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-18 somedata[integer]:-18 somenum[integer]:-18 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-17 somedata[integer]:-17 somenum[integer]:-17 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: INSERT: id[integer]:-16 somedata[integer]:-16 somenum[integer]:-16 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-15 somedata[integer]:-15 somenum[integer]:-14 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-14 somedata[integer]:-14 somenum[integer]:-13 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-13 somedata[integer]:-13 somenum[integer]:-12 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-12 somedata[integer]:-12 somenum[integer]:-11 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-11 somedata[integer]:-11 somenum[integer]:-10 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-10 somedata[integer]:-10 somenum[integer]:-9 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-9 somedata[integer]:-9 somenum[integer]:-8 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-8 somedata[integer]:-8 somenum[integer]:-7 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-7 somedata[integer]:-7 somenum[integer]:-6 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-6 somedata[integer]:-6 somenum[integer]:-5 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-5 somedata[integer]:-5 somenum[integer]:-4 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-4 somedata[integer]:-4 somenum[integer]:-3 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-3 somedata[integer]:-3 somenum[integer]:-2 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-2 somedata[integer]:-2 somenum[integer]:-1 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: UPDATE: id[integer]:-1 somedata[integer]:-1 somenum[integer]:0 zaphod1[integer]:null zaphod2[integer]:null
table public.replication_example: DELETE: id[integer]:0
table public.replication_example: DELETE: id[integer]:1
table public.replication_example: DELETE: id[integer]:2
table public.replication_example: DELETE: id[integer]:3
table public.replication_example: DELETE: id[integer]:4
table public.replication_example: DELETE: id[integer]:5
COMMIT
(28 rows)
CREATE TABLE tr_unique(id2 serial unique NOT NULL, data int);
INSERT INTO tr_unique(data) VALUES(10);
ALTER TABLE tr_unique RENAME TO tr_pkey;
ALTER TABLE tr_pkey ADD COLUMN id serial primary key;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'include-rewrites', '1');
data
-----------------------------------------------------------------------------
BEGIN
table public.tr_unique: INSERT: id2[integer]:1 data[integer]:10
COMMIT
BEGIN
table public.tr_pkey: INSERT: id2[integer]:1 data[integer]:10 id[integer]:1
COMMIT
(6 rows)
INSERT INTO tr_pkey(data) VALUES(1);
--show deletion with primary key
DELETE FROM tr_pkey;
/* display results */
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
----------------------------------------------------------------------------
BEGIN
table public.tr_pkey: INSERT: id2[integer]:2 data[integer]:1 id[integer]:2
COMMIT
BEGIN
table public.tr_pkey: DELETE: id[integer]:1
table public.tr_pkey: DELETE: id[integer]:2
COMMIT
(7 rows)
/*
* check that disk spooling works (also for logical messages)
*/
BEGIN;
CREATE TABLE tr_etoomuch (id serial primary key, data int);
INSERT INTO tr_etoomuch(data) SELECT g.i FROM generate_series(1, 10234) g(i);
SELECT 'tx logical msg' FROM pg_logical_emit_message(true, 'test', 'tx logical msg');
?column?
----------------
tx logical msg
(1 row)
DELETE FROM tr_etoomuch WHERE id < 5000;
UPDATE tr_etoomuch SET data = - data WHERE id > 5000;
CREATE TABLE tr_oddlength (id text primary key, data text);
INSERT INTO tr_oddlength VALUES('ab', 'foo');
COMMIT;
/* display results, but hide most of the output */
SELECT count(*), min(data), max(data)
FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1')
GROUP BY substring(data, 1, 24)
ORDER BY 1,2;
count | min | max
-------+-----------------------------------------------------------------------+------------------------------------------------------------------------
1 | BEGIN | BEGIN
1 | COMMIT | COMMIT
1 | message: transactional: 1 prefix: test, sz: 14 content:tx logical msg | message: transactional: 1 prefix: test, sz: 14 content:tx logical msg
1 | table public.tr_oddlength: INSERT: id[text]:'ab' data[text]:'foo' | table public.tr_oddlength: INSERT: id[text]:'ab' data[text]:'foo'
20467 | table public.tr_etoomuch: DELETE: id[integer]:1 | table public.tr_etoomuch: UPDATE: id[integer]:9999 data[integer]:-9999
(5 rows)
-- check updates of primary keys work correctly
BEGIN;
CREATE TABLE spoolme AS SELECT g.i FROM generate_series(1, 5000) g(i);
UPDATE tr_etoomuch SET id = -id WHERE id = 5000;
UPDATE tr_oddlength SET id = 'x', data = 'quux';
UPDATE tr_oddlength SET id = 'yy', data = 'a';
DELETE FROM spoolme;
DROP TABLE spoolme;
COMMIT;
SELECT data
FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1')
WHERE data ~ 'UPDATE';
data
-------------------------------------------------------------------------------------------------------------
table public.tr_etoomuch: UPDATE: old-key: id[integer]:5000 new-tuple: id[integer]:-5000 data[integer]:5000
table public.tr_oddlength: UPDATE: old-key: id[text]:'ab' new-tuple: id[text]:'x' data[text]:'quux'
table public.tr_oddlength: UPDATE: old-key: id[text]:'x' new-tuple: id[text]:'yy' data[text]:'a'
(3 rows)
-- check that a large, spooled, upsert works
INSERT INTO tr_etoomuch (id, data)
SELECT g.i, -g.i FROM generate_series(8000, 12000) g(i)
ON CONFLICT(id) DO UPDATE SET data = EXCLUDED.data;
SELECT substring(data, 1, 29), count(*)
FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1') WITH ORDINALITY
GROUP BY 1
ORDER BY min(ordinality);
substring | count
-------------------------------+-------
BEGIN | 1
table public.tr_etoomuch: UPD | 2235
table public.tr_etoomuch: INS | 1766
COMMIT | 1
(4 rows)
/*
* check whether we decode subtransactions correctly in relation with each
* other
*/
CREATE TABLE tr_sub (id serial primary key, path text);
-- toplevel, subtxn, toplevel, subtxn, subtxn
BEGIN;
INSERT INTO tr_sub(path) VALUES ('1-top-#1');
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('1-top-1-#1');
INSERT INTO tr_sub(path) VALUES ('1-top-1-#2');
RELEASE SAVEPOINT a;
SAVEPOINT b;
SAVEPOINT c;
INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#1');
INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#2');
RELEASE SAVEPOINT c;
INSERT INTO tr_sub(path) VALUES ('1-top-2-#1');
RELEASE SAVEPOINT b;
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
----------------------------------------------------------------------
BEGIN
table public.tr_sub: INSERT: id[integer]:1 path[text]:'1-top-#1'
table public.tr_sub: INSERT: id[integer]:2 path[text]:'1-top-1-#1'
table public.tr_sub: INSERT: id[integer]:3 path[text]:'1-top-1-#2'
table public.tr_sub: INSERT: id[integer]:4 path[text]:'1-top-2-1-#1'
table public.tr_sub: INSERT: id[integer]:5 path[text]:'1-top-2-1-#2'
table public.tr_sub: INSERT: id[integer]:6 path[text]:'1-top-2-#1'
COMMIT
(8 rows)
-- check that we handle xlog assignments correctly
BEGIN;
-- nest 80 subtxns
SAVEPOINT subtop;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
-- assign xid by inserting
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#1');
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#2');
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#3');
RELEASE SAVEPOINT subtop;
INSERT INTO tr_sub(path) VALUES ('2-top-#1');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
------------------------------------------------------------------------
BEGIN
table public.tr_sub: INSERT: id[integer]:7 path[text]:'2-top-1...--#1'
table public.tr_sub: INSERT: id[integer]:8 path[text]:'2-top-1...--#2'
table public.tr_sub: INSERT: id[integer]:9 path[text]:'2-top-1...--#3'
table public.tr_sub: INSERT: id[integer]:10 path[text]:'2-top-#1'
COMMIT
(6 rows)
-- make sure rollbacked subtransactions aren't decoded
BEGIN;
INSERT INTO tr_sub(path) VALUES ('3-top-2-#1');
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('3-top-2-1-#1');
SAVEPOINT b;
INSERT INTO tr_sub(path) VALUES ('3-top-2-2-#1');
ROLLBACK TO SAVEPOINT b;
INSERT INTO tr_sub(path) VALUES ('3-top-2-#2');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
-----------------------------------------------------------------------
BEGIN
table public.tr_sub: INSERT: id[integer]:11 path[text]:'3-top-2-#1'
table public.tr_sub: INSERT: id[integer]:12 path[text]:'3-top-2-1-#1'
table public.tr_sub: INSERT: id[integer]:14 path[text]:'3-top-2-#2'
COMMIT
(5 rows)
-- test whether a known, but not yet logged toplevel xact, followed by a
-- subxact commit is handled correctly
BEGIN;
SELECT pg_current_xact_id() != '0'; -- so no fixed xid appears in the outfile
?column?
----------
t
(1 row)
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('4-top-1-#1');
RELEASE SAVEPOINT a;
COMMIT;
-- test whether a change in a subtransaction, in an unknown toplevel
-- xact is handled correctly.
BEGIN;
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('5-top-1-#1');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
---------------------------------------------------------------------
BEGIN
table public.tr_sub: INSERT: id[integer]:15 path[text]:'4-top-1-#1'
COMMIT
BEGIN
table public.tr_sub: INSERT: id[integer]:16 path[text]:'5-top-1-#1'
COMMIT
(6 rows)
-- check that DDL in aborted subtransactions handled correctly
CREATE TABLE tr_sub_ddl(data int);
BEGIN;
SAVEPOINT a;
ALTER TABLE tr_sub_ddl ALTER COLUMN data TYPE text;
INSERT INTO tr_sub_ddl VALUES ('blah-blah');
ROLLBACK TO SAVEPOINT a;
ALTER TABLE tr_sub_ddl ALTER COLUMN data TYPE bigint;
INSERT INTO tr_sub_ddl VALUES(43);
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
--------------------------------------------------
BEGIN
table public.tr_sub_ddl: INSERT: data[bigint]:43
COMMIT
(3 rows)
/*
* Check whether treating a table as a catalog table works somewhat
*/
CREATE TABLE replication_metadata (
id serial primary key,
relation name NOT NULL,
options text[]
)
WITH (user_catalog_table = true)
;
\d+ replication_metadata
Table "public.replication_metadata"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
----------+---------+-----------+----------+--------------------------------------------------+----------+--------------+-------------
id | integer | | not null | nextval('replication_metadata_id_seq'::regclass) | plain | |
relation | name | | not null | | plain | |
options | text[] | | | | extended | |
Indexes:
"replication_metadata_pkey" PRIMARY KEY, btree (id)
Not-null constraints:
"replication_metadata_id_not_null" NOT NULL "id"
"replication_metadata_relation_not_null" NOT NULL "relation"
Options: user_catalog_table=true
INSERT INTO replication_metadata(relation, options)
VALUES ('foo', ARRAY['a', 'b']);
ALTER TABLE replication_metadata RESET (user_catalog_table);
\d+ replication_metadata
Table "public.replication_metadata"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
----------+---------+-----------+----------+--------------------------------------------------+----------+--------------+-------------
id | integer | | not null | nextval('replication_metadata_id_seq'::regclass) | plain | |
relation | name | | not null | | plain | |
options | text[] | | | | extended | |
Indexes:
"replication_metadata_pkey" PRIMARY KEY, btree (id)
Not-null constraints:
"replication_metadata_id_not_null" NOT NULL "id"
"replication_metadata_relation_not_null" NOT NULL "relation"
INSERT INTO replication_metadata(relation, options)
VALUES ('bar', ARRAY['a', 'b']);
ALTER TABLE replication_metadata SET (user_catalog_table = true);
\d+ replication_metadata
Table "public.replication_metadata"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
----------+---------+-----------+----------+--------------------------------------------------+----------+--------------+-------------
id | integer | | not null | nextval('replication_metadata_id_seq'::regclass) | plain | |
relation | name | | not null | | plain | |
options | text[] | | | | extended | |
Indexes:
"replication_metadata_pkey" PRIMARY KEY, btree (id)
Not-null constraints:
"replication_metadata_id_not_null" NOT NULL "id"
"replication_metadata_relation_not_null" NOT NULL "relation"
Options: user_catalog_table=true
INSERT INTO replication_metadata(relation, options)
VALUES ('blub', NULL);
-- make sure rewrites don't work
ALTER TABLE replication_metadata ADD COLUMN rewritemeornot int;
ALTER TABLE replication_metadata ALTER COLUMN rewritemeornot TYPE text;
ERROR: cannot rewrite table "replication_metadata" used as a catalog table
ALTER TABLE replication_metadata SET (user_catalog_table = false);
\d+ replication_metadata
Table "public.replication_metadata"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
----------------+---------+-----------+----------+--------------------------------------------------+----------+--------------+-------------
id | integer | | not null | nextval('replication_metadata_id_seq'::regclass) | plain | |
relation | name | | not null | | plain | |
options | text[] | | | | extended | |
rewritemeornot | integer | | | | plain | |
Indexes:
"replication_metadata_pkey" PRIMARY KEY, btree (id)
Not-null constraints:
"replication_metadata_id_not_null" NOT NULL "id"
"replication_metadata_relation_not_null" NOT NULL "relation"
Options: user_catalog_table=false
INSERT INTO replication_metadata(relation, options)
VALUES ('zaphod', NULL);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
------------------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_metadata: INSERT: id[integer]:1 relation[name]:'foo' options[text[]]:'{a,b}'
COMMIT
BEGIN
table public.replication_metadata: INSERT: id[integer]:2 relation[name]:'bar' options[text[]]:'{a,b}'
COMMIT
BEGIN
table public.replication_metadata: INSERT: id[integer]:3 relation[name]:'blub' options[text[]]:null
COMMIT
BEGIN
table public.replication_metadata: INSERT: id[integer]:4 relation[name]:'zaphod' options[text[]]:null rewritemeornot[integer]:null
COMMIT
(12 rows)
/*
* check whether we handle updates/deletes correct with & without a pkey
*/
/* we should handle the case without a key at all more gracefully */
CREATE TABLE table_without_key(id serial, data int);
INSERT INTO table_without_key(data) VALUES(1),(2);
DELETE FROM table_without_key WHERE data = 1;
-- won't log old keys
UPDATE table_without_key SET data = 3 WHERE data = 2;
UPDATE table_without_key SET id = -id;
UPDATE table_without_key SET id = -id;
-- should log the full old row now
ALTER TABLE table_without_key REPLICA IDENTITY FULL;
UPDATE table_without_key SET data = 3 WHERE data = 2;
UPDATE table_without_key SET id = -id;
UPDATE table_without_key SET id = -id;
-- ensure that FULL correctly deals with new columns
ALTER TABLE table_without_key ADD COLUMN new_column text;
UPDATE table_without_key SET id = -id;
UPDATE table_without_key SET id = -id, new_column = 'someval';
DELETE FROM table_without_key WHERE data = 3;
CREATE TABLE table_with_pkey(id serial primary key, data int);
INSERT INTO table_with_pkey(data) VALUES(1), (2);
DELETE FROM table_with_pkey WHERE data = 1;
-- should log the old pkey
UPDATE table_with_pkey SET data = 3 WHERE data = 2;
UPDATE table_with_pkey SET id = -id;
UPDATE table_with_pkey SET id = -id;
-- check that we log nothing despite having a pkey
ALTER TABLE table_without_key REPLICA IDENTITY NOTHING;
UPDATE table_with_pkey SET id = -id;
-- check that we log everything despite having a pkey
ALTER TABLE table_without_key REPLICA IDENTITY FULL;
UPDATE table_with_pkey SET id = -id;
DELETE FROM table_with_pkey WHERE data = 3;
CREATE TABLE table_with_unique_not_null(id serial unique, data int);
ALTER TABLE table_with_unique_not_null ALTER COLUMN id SET NOT NULL; --already set
-- won't log anything, replica identity not setup
INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
DELETE FROM table_with_unique_not_null WHERE data = 1;
UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
UPDATE table_with_unique_not_null SET id = -id;
UPDATE table_with_unique_not_null SET id = -id;
DELETE FROM table_with_unique_not_null WHERE data = 3;
-- should log old key
ALTER TABLE table_with_unique_not_null REPLICA IDENTITY USING INDEX table_with_unique_not_null_id_key;
INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
DELETE FROM table_with_unique_not_null WHERE data = 1;
UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
UPDATE table_with_unique_not_null SET id = -id;
UPDATE table_with_unique_not_null SET id = -id;
DELETE FROM table_with_unique_not_null WHERE data = 3;
-- check tables with dropped indexes used in REPLICA IDENTITY
-- table with primary key
CREATE TABLE table_dropped_index_with_pk (a int PRIMARY KEY, b int, c int);
CREATE UNIQUE INDEX table_dropped_index_with_pk_idx
ON table_dropped_index_with_pk(a);
ALTER TABLE table_dropped_index_with_pk REPLICA IDENTITY
USING INDEX table_dropped_index_with_pk_idx;
DROP INDEX table_dropped_index_with_pk_idx;
INSERT INTO table_dropped_index_with_pk VALUES (1,1,1), (2,2,2), (3,3,3);
UPDATE table_dropped_index_with_pk SET a = 4 WHERE a = 1;
UPDATE table_dropped_index_with_pk SET b = 5 WHERE a = 2;
UPDATE table_dropped_index_with_pk SET b = 6, c = 7 WHERE a = 3;
DELETE FROM table_dropped_index_with_pk WHERE b = 1;
DELETE FROM table_dropped_index_with_pk WHERE a = 3;
DROP TABLE table_dropped_index_with_pk;
-- table without primary key
CREATE TABLE table_dropped_index_no_pk (a int NOT NULL, b int, c int);
CREATE UNIQUE INDEX table_dropped_index_no_pk_idx
ON table_dropped_index_no_pk(a);
ALTER TABLE table_dropped_index_no_pk REPLICA IDENTITY
USING INDEX table_dropped_index_no_pk_idx;
DROP INDEX table_dropped_index_no_pk_idx;
INSERT INTO table_dropped_index_no_pk VALUES (1,1,1), (2,2,2), (3,3,3);
UPDATE table_dropped_index_no_pk SET a = 4 WHERE a = 1;
UPDATE table_dropped_index_no_pk SET b = 5 WHERE a = 2;
UPDATE table_dropped_index_no_pk SET b = 6, c = 7 WHERE a = 3;
DELETE FROM table_dropped_index_no_pk WHERE b = 1;
DELETE FROM table_dropped_index_no_pk WHERE a = 3;
DROP TABLE table_dropped_index_no_pk;
-- check toast support
BEGIN;
CREATE SEQUENCE toasttable_rand_seq START 79 INCREMENT 1499; -- portable "random"
CREATE TABLE toasttable(
id serial primary key,
toasted_col1 text,
rand1 float8 DEFAULT nextval('toasttable_rand_seq'),
toasted_col2 text,
rand2 float8 DEFAULT nextval('toasttable_rand_seq')
);
COMMIT;
-- uncompressed external toast data
INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
-- compressed external toast data
INSERT INTO toasttable(toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
-- update of existing column
UPDATE toasttable
SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
WHERE id = 1;
-- This output is extremely wide, and using aligned mode causes psql to
-- produce 200kB of useless dashes. Turn that off temporarily to avoid it.
\pset format unaligned
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
BEGIN
table public.table_without_key: INSERT: id[integer]:1 data[integer]:1
table public.table_without_key: INSERT: id[integer]:2 data[integer]:2
COMMIT
BEGIN
table public.table_without_key: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_without_key: UPDATE: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_without_key: UPDATE: id[integer]:-2 data[integer]:3
COMMIT
BEGIN
table public.table_without_key: UPDATE: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_without_key: UPDATE: old-key: id[integer]:2 data[integer]:3 new-tuple: id[integer]:-2 data[integer]:3
COMMIT
BEGIN
table public.table_without_key: UPDATE: old-key: id[integer]:-2 data[integer]:3 new-tuple: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_without_key: UPDATE: old-key: id[integer]:2 data[integer]:3 new-tuple: id[integer]:-2 data[integer]:3 new_column[text]:null
COMMIT
BEGIN
table public.table_without_key: UPDATE: old-key: id[integer]:-2 data[integer]:3 new-tuple: id[integer]:2 data[integer]:3 new_column[text]:'someval'
COMMIT
BEGIN
table public.table_without_key: DELETE: id[integer]:2 data[integer]:3 new_column[text]:'someval'
COMMIT
BEGIN
table public.table_with_pkey: INSERT: id[integer]:1 data[integer]:1
table public.table_with_pkey: INSERT: id[integer]:2 data[integer]:2
COMMIT
BEGIN
table public.table_with_pkey: DELETE: id[integer]:1
COMMIT
BEGIN
table public.table_with_pkey: UPDATE: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_with_pkey: UPDATE: old-key: id[integer]:2 new-tuple: id[integer]:-2 data[integer]:3
COMMIT
BEGIN
table public.table_with_pkey: UPDATE: old-key: id[integer]:-2 new-tuple: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_with_pkey: UPDATE: old-key: id[integer]:2 new-tuple: id[integer]:-2 data[integer]:3
COMMIT
BEGIN
table public.table_with_pkey: UPDATE: old-key: id[integer]:-2 new-tuple: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_with_pkey: DELETE: id[integer]:2
COMMIT
BEGIN
table public.table_with_unique_not_null: INSERT: id[integer]:1 data[integer]:1
table public.table_with_unique_not_null: INSERT: id[integer]:2 data[integer]:2
COMMIT
BEGIN
table public.table_with_unique_not_null: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: id[integer]:-2 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: id[integer]:2 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_with_unique_not_null: INSERT: id[integer]:3 data[integer]:1
table public.table_with_unique_not_null: INSERT: id[integer]:4 data[integer]:2
COMMIT
BEGIN
table public.table_with_unique_not_null: DELETE: id[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: id[integer]:4 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: old-key: id[integer]:4 new-tuple: id[integer]:-4 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: UPDATE: old-key: id[integer]:-4 new-tuple: id[integer]:4 data[integer]:3
COMMIT
BEGIN
table public.table_with_unique_not_null: DELETE: id[integer]:4
COMMIT
BEGIN
table public.table_dropped_index_with_pk: INSERT: a[integer]:1 b[integer]:1 c[integer]:1
table public.table_dropped_index_with_pk: INSERT: a[integer]:2 b[integer]:2 c[integer]:2
table public.table_dropped_index_with_pk: INSERT: a[integer]:3 b[integer]:3 c[integer]:3
COMMIT
BEGIN
table public.table_dropped_index_with_pk: UPDATE: a[integer]:4 b[integer]:1 c[integer]:1
COMMIT
BEGIN
table public.table_dropped_index_with_pk: UPDATE: a[integer]:2 b[integer]:5 c[integer]:2
COMMIT
BEGIN
table public.table_dropped_index_with_pk: UPDATE: a[integer]:3 b[integer]:6 c[integer]:7
COMMIT
BEGIN
table public.table_dropped_index_with_pk: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_dropped_index_with_pk: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_dropped_index_no_pk: INSERT: a[integer]:1 b[integer]:1 c[integer]:1
table public.table_dropped_index_no_pk: INSERT: a[integer]:2 b[integer]:2 c[integer]:2
table public.table_dropped_index_no_pk: INSERT: a[integer]:3 b[integer]:3 c[integer]:3
COMMIT
BEGIN
table public.table_dropped_index_no_pk: UPDATE: a[integer]:4 b[integer]:1 c[integer]:1
COMMIT
BEGIN
table public.table_dropped_index_no_pk: UPDATE: a[integer]:2 b[integer]:5 c[integer]:2
COMMIT
BEGIN
table public.table_dropped_index_no_pk: UPDATE: a[integer]:3 b[integer]:6 c[integer]:7
COMMIT
BEGIN
table public.table_dropped_index_no_pk: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.table_dropped_index_no_pk: DELETE: (no-tuple-data)
COMMIT
BEGIN
table public.toasttable: INSERT: id[integer]:1 toasted_col1[text]:'123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152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rand1[double precision]:79 toasted_col2[text]:null rand2[double precision]:1578
COMMIT
BEGIN
table public.toasttable: INSERT: id[integer]:2 toasted_col1[text]:null rand1[double precision]:3077 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04960497049804990500' rand2[double precision]:4576
COMMIT
BEGIN
table public.toasttable: UPDATE: id[integer]:1 toasted_col1[text]:'12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000' rand1[double precision]:79 toasted_col2[text]:null rand2[double precision]:1578
COMMIT
(143 rows)
\pset format aligned
INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
-- update of second column, first column unchanged
UPDATE toasttable
SET toasted_col2 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
WHERE id = 1;
-- make sure we decode correctly even if the toast table is gone
DROP TABLE toasttable;
\pset format unaligned
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
BEGIN
table public.toasttable: INSERT: id[integer]:3 toasted_col1[text]:'12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000' rand1[double precision]:6075 toasted_col2[text]:null rand2[double precision]:7574
COMMIT
BEGIN
table public.toasttable: UPDATE: id[integer]:1 toasted_col1[text]:unchanged-toast-datum rand1[double precision]:79 toasted_col2[text]:'123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152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rand2[double precision]:1578
COMMIT
(6 rows)
-- done, free logical replication slot
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
data
(0 rows)
\pset format aligned
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
/* check that the slot is gone */
\x
SELECT * FROM pg_replication_slots;
(0 rows)
\x