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65af1e8422
When using replication origins, pg_replication_origin_xact_setup() is an
optional choice to be able to set a LSN and a timestamp to mark the
origin, which would be additionally added to WAL for transaction commits
or aborts (including 2PC transactions). An assertion in the code path
of PREPARE TRANSACTION assumed that this data should always be set, so
it would trigger when using replication origins without setting up an
origin LSN. Some tests are added to cover more this kind of scenario.
Oversight in commit 1eb6d65.
Per discussion with Amit Kapila and Masahiko Sawada.
Discussion: https://postgr.es/m/YbbBfNSvMm5nIINV@paquier.xyz
Backpatch-through: 11
231 lines
8.5 KiB
Plaintext
231 lines
8.5 KiB
Plaintext
-- predictability
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SET synchronous_commit = on;
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CREATE TABLE origin_tbl(id serial primary key, data text);
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CREATE TABLE target_tbl(id serial primary key, data text);
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SELECT pg_replication_origin_create('regress_test_decoding: regression_slot');
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pg_replication_origin_create
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------------------------------
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1
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(1 row)
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-- ensure duplicate creations fail
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SELECT pg_replication_origin_create('regress_test_decoding: regression_slot');
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ERROR: duplicate key value violates unique constraint "pg_replication_origin_roname_index"
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DETAIL: Key (roname)=(regress_test_decoding: regression_slot) already exists.
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--ensure deletions work (once)
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SELECT pg_replication_origin_create('regress_test_decoding: temp');
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pg_replication_origin_create
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------------------------------
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2
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(1 row)
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SELECT pg_replication_origin_drop('regress_test_decoding: temp');
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pg_replication_origin_drop
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----------------------------
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(1 row)
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SELECT pg_replication_origin_drop('regress_test_decoding: temp');
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ERROR: replication origin "regress_test_decoding: temp" does not exist
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-- various failure checks for undefined slots
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select pg_replication_origin_advance('regress_test_decoding: temp', '0/1');
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ERROR: replication origin "regress_test_decoding: temp" does not exist
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select pg_replication_origin_session_setup('regress_test_decoding: temp');
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ERROR: replication origin "regress_test_decoding: temp" does not exist
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select pg_replication_origin_progress('regress_test_decoding: temp', true);
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ERROR: replication origin "regress_test_decoding: temp" does not exist
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', '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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-- origin tx
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INSERT INTO origin_tbl(data) VALUES ('will be replicated and decoded and decoded again');
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INSERT INTO target_tbl(data)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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-- as is normal, the insert into target_tbl shows up
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', 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.target_tbl: INSERT: id[integer]:1 data[text]:'BEGIN'
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table public.target_tbl: INSERT: id[integer]:2 data[text]:'table public.origin_tbl: INSERT: id[integer]:1 data[text]:''will be replicated and decoded and decoded again'''
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table public.target_tbl: INSERT: id[integer]:3 data[text]:'COMMIT'
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COMMIT
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(5 rows)
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INSERT INTO origin_tbl(data) VALUES ('will be replicated, but not decoded again');
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-- mark session as replaying
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SELECT pg_replication_origin_session_setup('regress_test_decoding: regression_slot');
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pg_replication_origin_session_setup
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-------------------------------------
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(1 row)
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-- ensure we prevent duplicate setup
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SELECT pg_replication_origin_session_setup('regress_test_decoding: regression_slot');
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ERROR: cannot setup replication origin when one is already setup
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SELECT '' FROM pg_logical_emit_message(false, 'test', 'this message will not be decoded');
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?column?
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----------
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(1 row)
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BEGIN;
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-- setup transaction origin
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SELECT pg_replication_origin_xact_setup('0/aabbccdd', '2013-01-01 00:00');
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pg_replication_origin_xact_setup
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----------------------------------
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(1 row)
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INSERT INTO target_tbl(data)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'only-local', '1');
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COMMIT;
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-- check replication progress for the session is correct
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SELECT pg_replication_origin_session_progress(false);
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pg_replication_origin_session_progress
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----------------------------------------
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0/AABBCCDD
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(1 row)
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SELECT pg_replication_origin_session_progress(true);
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pg_replication_origin_session_progress
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----------------------------------------
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0/AABBCCDD
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(1 row)
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SELECT pg_replication_origin_session_reset();
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pg_replication_origin_session_reset
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-------------------------------------
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(1 row)
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SELECT local_id, external_id, remote_lsn, local_lsn <> '0/0' FROM pg_replication_origin_status;
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local_id | external_id | remote_lsn | ?column?
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----------+----------------------------------------+------------+----------
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1 | regress_test_decoding: regression_slot | 0/AABBCCDD | t
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(1 row)
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-- check replication progress identified by name is correct
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SELECT pg_replication_origin_progress('regress_test_decoding: regression_slot', false);
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pg_replication_origin_progress
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--------------------------------
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0/AABBCCDD
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(1 row)
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SELECT pg_replication_origin_progress('regress_test_decoding: regression_slot', true);
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pg_replication_origin_progress
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--------------------------------
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0/AABBCCDD
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(1 row)
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-- ensure reset requires previously setup state
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SELECT pg_replication_origin_session_reset();
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ERROR: no replication origin is configured
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-- and magically the replayed xact will be filtered!
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'only-local', '1');
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data
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------
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(0 rows)
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--but new original changes still show up
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INSERT INTO origin_tbl(data) VALUES ('will be replicated');
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'only-local', '1');
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data
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--------------------------------------------------------------------------------
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BEGIN
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table public.origin_tbl: INSERT: id[integer]:3 data[text]:'will be replicated'
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COMMIT
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(3 rows)
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_replication_origin_drop('regress_test_decoding: regression_slot');
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pg_replication_origin_drop
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----------------------------
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(1 row)
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-- Set of transactions with no origin LSNs and commit timestamps set for
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-- this session.
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_no_lsn', '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 pg_replication_origin_create('regress_test_decoding: regression_slot_no_lsn');
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pg_replication_origin_create
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------------------------------
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1
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(1 row)
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-- mark session as replaying
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SELECT pg_replication_origin_session_setup('regress_test_decoding: regression_slot_no_lsn');
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pg_replication_origin_session_setup
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-------------------------------------
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(1 row)
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-- Simple transactions
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BEGIN;
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INSERT INTO origin_tbl(data) VALUES ('no_lsn, commit');
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COMMIT;
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BEGIN;
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INSERT INTO origin_tbl(data) VALUES ('no_lsn, rollback');
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ROLLBACK;
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-- 2PC transactions
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BEGIN;
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INSERT INTO origin_tbl(data) VALUES ('no_lsn, commit prepared');
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PREPARE TRANSACTION 'replorigin_prepared';
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COMMIT PREPARED 'replorigin_prepared';
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BEGIN;
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INSERT INTO origin_tbl(data) VALUES ('no_lsn, rollback prepared');
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PREPARE TRANSACTION 'replorigin_prepared';
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ROLLBACK PREPARED 'replorigin_prepared';
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SELECT local_id, external_id,
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remote_lsn <> '0/0' AS valid_remote_lsn,
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local_lsn <> '0/0' AS valid_local_lsn
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FROM pg_replication_origin_status;
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local_id | external_id | valid_remote_lsn | valid_local_lsn
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----------+-----------------------------------------------+------------------+-----------------
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1 | regress_test_decoding: regression_slot_no_lsn | f | t
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(1 row)
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SELECT data FROM pg_logical_slot_get_changes('regression_slot_no_lsn', NULL, NULL, 'skip-empty-xacts', '1', 'include-xids', '0');
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data
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-------------------------------------------------------------------------------------
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BEGIN
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table public.origin_tbl: INSERT: id[integer]:4 data[text]:'no_lsn, commit'
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COMMIT
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BEGIN
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table public.origin_tbl: INSERT: id[integer]:6 data[text]:'no_lsn, commit prepared'
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COMMIT
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(6 rows)
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-- Clean up
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SELECT pg_replication_origin_session_reset();
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pg_replication_origin_session_reset
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-------------------------------------
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(1 row)
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SELECT pg_drop_replication_slot('regression_slot_no_lsn');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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SELECT pg_replication_origin_drop('regress_test_decoding: regression_slot_no_lsn');
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pg_replication_origin_drop
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----------------------------
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(1 row)
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