mirror of https://github.com/postgres/postgres
409 lines
13 KiB
Plaintext
409 lines
13 KiB
Plaintext
-- predictability
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SET synchronous_commit = on;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_p', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_t', 'test_decoding', true);
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?column?
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----------
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init
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(1 row)
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SELECT pg_drop_replication_slot('regression_slot_p');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_p', 'test_decoding', false);
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?column?
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----------
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init
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(1 row)
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_t2', 'test_decoding', true);
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?column?
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----------
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init
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(1 row)
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SELECT pg_create_logical_replication_slot('foo', 'nonexistent');
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ERROR: could not access file "nonexistent": No such file or directory
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-- here we want to start a new session and wait till old one is gone
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select pg_backend_pid() as oldpid \gset
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\c -
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SET synchronous_commit = on;
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do 'declare c int = 0;
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begin
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while (select count(*) from pg_replication_slots where active_pid = '
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:'oldpid'
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') > 0 loop c := c + 1; perform pg_sleep(0.01); end loop;
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raise log ''slot test looped % times'', c;
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end';
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-- should fail because the temporary slots were dropped automatically
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SELECT pg_drop_replication_slot('regression_slot_t');
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ERROR: replication slot "regression_slot_t" does not exist
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SELECT pg_drop_replication_slot('regression_slot_t2');
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ERROR: replication slot "regression_slot_t2" does not exist
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-- monitoring functions for slot directories
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SELECT count(*) >= 0 AS ok FROM pg_ls_logicalmapdir();
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ok
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----
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t
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(1 row)
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SELECT count(*) >= 0 AS ok FROM pg_ls_logicalsnapdir();
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ok
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----
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t
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(1 row)
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SELECT count(*) >= 0 AS ok FROM pg_ls_replslotdir('regression_slot_p');
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ok
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----
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t
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(1 row)
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SELECT count(*) >= 0 AS ok FROM pg_ls_replslotdir('not_existing_slot'); -- fails
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ERROR: replication slot "not_existing_slot" does not exist
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-- permanent slot has survived
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SELECT pg_drop_replication_slot('regression_slot_p');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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-- test switching between slots in a session
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot1', 'test_decoding', true);
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?column?
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----------
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init
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(1 row)
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CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
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BEGIN;
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INSERT INTO replication_example(somedata, text) VALUES (1, 1);
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INSERT INTO replication_example(somedata, text) VALUES (1, 2);
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COMMIT;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot2', 'test_decoding', true);
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?column?
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----------
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init
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(1 row)
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INSERT INTO replication_example(somedata, text) VALUES (1, 3);
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SELECT data FROM pg_logical_slot_get_changes('regression_slot1', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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---------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:'1'
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table public.replication_example: INSERT: id[integer]:2 somedata[integer]:1 text[character varying]:'2'
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COMMIT
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BEGIN
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table public.replication_example: INSERT: id[integer]:3 somedata[integer]:1 text[character varying]:'3'
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COMMIT
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(7 rows)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot2', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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---------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:3 somedata[integer]:1 text[character varying]:'3'
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COMMIT
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(3 rows)
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INSERT INTO replication_example(somedata, text) VALUES (1, 4);
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INSERT INTO replication_example(somedata, text) VALUES (1, 5);
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SELECT pg_current_wal_lsn() AS wal_lsn \gset
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INSERT INTO replication_example(somedata, text) VALUES (1, 6);
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SELECT end_lsn FROM pg_replication_slot_advance('regression_slot1', :'wal_lsn') \gset
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SELECT slot_name FROM pg_replication_slot_advance('regression_slot2', pg_current_wal_lsn());
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slot_name
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------------------
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regression_slot2
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(1 row)
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SELECT :'wal_lsn' = :'end_lsn';
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?column?
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----------
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t
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(1 row)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot1', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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---------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:6 somedata[integer]:1 text[character varying]:'6'
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COMMIT
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(3 rows)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot2', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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------
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(0 rows)
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DROP TABLE replication_example;
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-- error
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot1', 'test_decoding', true);
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ERROR: replication slot "regression_slot1" already exists
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-- both should error as they should be dropped on error
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SELECT pg_drop_replication_slot('regression_slot1');
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ERROR: replication slot "regression_slot1" does not exist
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SELECT pg_drop_replication_slot('regression_slot2');
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ERROR: replication slot "regression_slot2" does not exist
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-- slot advance with physical slot, error with non-reserved slot
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SELECT slot_name FROM pg_create_physical_replication_slot('regression_slot3');
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slot_name
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------------------
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regression_slot3
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(1 row)
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SELECT pg_replication_slot_advance('regression_slot3', '0/0'); -- invalid LSN
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ERROR: invalid target WAL LSN
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SELECT pg_replication_slot_advance('regression_slot3', '0/1'); -- error
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ERROR: replication slot "regression_slot3" cannot be advanced
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DETAIL: This slot has never previously reserved WAL, or it has been invalidated.
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SELECT pg_drop_replication_slot('regression_slot3');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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--
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-- Test copy functions for logical replication slots
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--
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-- Create and copy logical slots
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SELECT 'init' FROM pg_create_logical_replication_slot('orig_slot1', 'test_decoding', false);
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?column?
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----------
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init
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'copied_slot1_no_change');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'copied_slot1_change_plugin', false, 'pgoutput');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'copied_slot1_change_plugin_temp', true, 'pgoutput');
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?column?
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----------
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copy
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(1 row)
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-- Check all copied slots status
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SELECT
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o.slot_name, o.plugin, o.temporary, c.slot_name, c.plugin, c.temporary
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FROM
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(SELECT * FROM pg_replication_slots WHERE slot_name LIKE 'orig%') as o
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LEFT JOIN pg_replication_slots as c ON o.restart_lsn = c.restart_lsn AND o.confirmed_flush_lsn = c.confirmed_flush_lsn
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WHERE
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o.slot_name != c.slot_name
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ORDER BY o.slot_name, c.slot_name;
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slot_name | plugin | temporary | slot_name | plugin | temporary
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------------+---------------+-----------+---------------------------------+---------------+-----------
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orig_slot1 | test_decoding | f | copied_slot1_change_plugin | pgoutput | f
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orig_slot1 | test_decoding | f | copied_slot1_change_plugin_temp | pgoutput | t
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orig_slot1 | test_decoding | f | copied_slot1_no_change | test_decoding | f
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(3 rows)
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-- Now we have maximum 4 replication slots. Check slots are properly
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-- released even when raise error during creating the target slot.
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'failed'); -- error
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ERROR: all replication slots are in use
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HINT: Free one or increase max_replication_slots.
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-- temporary slots were dropped automatically
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SELECT pg_drop_replication_slot('orig_slot1');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('copied_slot1_no_change');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('copied_slot1_change_plugin');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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-- Test based on the temporary logical slot
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SELECT 'init' FROM pg_create_logical_replication_slot('orig_slot2', 'test_decoding', true);
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?column?
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----------
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init
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot2', 'copied_slot2_no_change');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot2', 'copied_slot2_change_plugin', true, 'pgoutput');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot2', 'copied_slot2_change_plugin_temp', false, 'pgoutput');
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?column?
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----------
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copy
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(1 row)
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-- Check all copied slots status
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SELECT
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o.slot_name, o.plugin, o.temporary, c.slot_name, c.plugin, c.temporary
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FROM
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(SELECT * FROM pg_replication_slots WHERE slot_name LIKE 'orig%') as o
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LEFT JOIN pg_replication_slots as c ON o.restart_lsn = c.restart_lsn AND o.confirmed_flush_lsn = c.confirmed_flush_lsn
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WHERE
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o.slot_name != c.slot_name
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ORDER BY o.slot_name, c.slot_name;
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slot_name | plugin | temporary | slot_name | plugin | temporary
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------------+---------------+-----------+---------------------------------+---------------+-----------
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orig_slot2 | test_decoding | t | copied_slot2_change_plugin | pgoutput | t
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orig_slot2 | test_decoding | t | copied_slot2_change_plugin_temp | pgoutput | f
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orig_slot2 | test_decoding | t | copied_slot2_no_change | test_decoding | t
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(3 rows)
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-- Cannot copy a logical slot to a physical slot
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot2', 'failed'); -- error
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ERROR: cannot copy physical replication slot "orig_slot2" as a logical replication slot
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-- temporary slots were dropped automatically
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SELECT pg_drop_replication_slot('copied_slot2_change_plugin_temp');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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--
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-- Test copy functions for physical replication slots
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--
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-- Create and copy physical slots
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SELECT 'init' FROM pg_create_physical_replication_slot('orig_slot1', true);
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?column?
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----------
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init
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(1 row)
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SELECT 'init' FROM pg_create_physical_replication_slot('orig_slot2', false);
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?column?
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----------
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init
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(1 row)
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot1', 'copied_slot1_no_change');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot1', 'copied_slot1_temp', true);
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?column?
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----------
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copy
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(1 row)
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-- Check all copied slots status. Since all slots don't reserve WAL we check only other fields.
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SELECT slot_name, slot_type, temporary FROM pg_replication_slots;
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slot_name | slot_type | temporary
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------------------------+-----------+-----------
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orig_slot1 | physical | f
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orig_slot2 | physical | f
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copied_slot1_no_change | physical | f
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copied_slot1_temp | physical | t
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(4 rows)
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-- Cannot copy a physical slot to a logical slot
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SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'failed'); -- error
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ERROR: cannot copy logical replication slot "orig_slot1" as a physical replication slot
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-- Cannot copy a physical slot that doesn't reserve WAL
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot2', 'failed'); -- error
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ERROR: cannot copy a replication slot that doesn't reserve WAL
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-- temporary slots were dropped automatically
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SELECT pg_drop_replication_slot('orig_slot1');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('orig_slot2');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('copied_slot1_no_change');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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-- Test based on the temporary physical slot
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SELECT 'init' FROM pg_create_physical_replication_slot('orig_slot2', true, true);
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?column?
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----------
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init
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(1 row)
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot2', 'copied_slot2_no_change');
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?column?
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----------
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copy
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(1 row)
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SELECT 'copy' FROM pg_copy_physical_replication_slot('orig_slot2', 'copied_slot2_notemp', false);
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?column?
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----------
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copy
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(1 row)
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-- Check all copied slots status
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SELECT
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o.slot_name, o.temporary, c.slot_name, c.temporary
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FROM
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(SELECT * FROM pg_replication_slots WHERE slot_name LIKE 'orig%') as o
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LEFT JOIN pg_replication_slots as c ON o.restart_lsn = c.restart_lsn
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WHERE
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o.slot_name != c.slot_name
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ORDER BY o.slot_name, c.slot_name;
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slot_name | temporary | slot_name | temporary
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------------+-----------+------------------------+-----------
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orig_slot2 | t | copied_slot2_no_change | t
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orig_slot2 | t | copied_slot2_notemp | f
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(2 rows)
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SELECT pg_drop_replication_slot('orig_slot2');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('copied_slot2_no_change');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_drop_replication_slot('copied_slot2_notemp');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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