citus/src/test/regress/expected/multi_transaction_recovery.out

ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 1220000;
-- Tests for prepared transaction recovery
-- Ensure pg_dist_transaction is empty for test
SELECT recover_prepared_transactions();
 recover_prepared_transactions 
-------------------------------
                             0
(1 row)

SELECT * FROM pg_dist_transaction;
 groupid | gid 
---------+-----
(0 rows)

-- Create some "fake" prepared transactions to recover
\c - - - :worker_1_port
BEGIN;
CREATE TABLE should_abort (value int);
PREPARE TRANSACTION 'citus_0_should_abort';
BEGIN;
CREATE TABLE should_commit (value int);
PREPARE TRANSACTION 'citus_0_should_commit';
BEGIN;
CREATE TABLE should_be_sorted_into_middle (value int);
PREPARE TRANSACTION 'citus_0_should_be_sorted_into_middle';
\c - - - :master_port
-- Add "fake" pg_dist_transaction records and run recovery
INSERT INTO pg_dist_transaction VALUES (1, 'citus_0_should_commit');
INSERT INTO pg_dist_transaction VALUES (1, 'citus_0_should_be_forgotten');
SELECT recover_prepared_transactions();
NOTICE:  recovered a prepared transaction on localhost:57637
CONTEXT:  ROLLBACK PREPARED 'citus_0_should_abort'
NOTICE:  recovered a prepared transaction on localhost:57637
CONTEXT:  ROLLBACK PREPARED 'citus_0_should_be_sorted_into_middle'
NOTICE:  recovered a prepared transaction on localhost:57637
CONTEXT:  COMMIT PREPARED 'citus_0_should_commit'
 recover_prepared_transactions 
-------------------------------
                             3
(1 row)

SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

-- Confirm that transactions were correctly rolled forward
\c - - - :worker_1_port
SELECT count(*) FROM pg_tables WHERE tablename = 'should_abort';
 count 
-------
     0
(1 row)

SELECT count(*) FROM pg_tables WHERE tablename = 'should_commit';
 count 
-------
     1
(1 row)

\c - - - :master_port
SET citus.shard_replication_factor TO 2;
SET citus.shard_count TO 2;
SET citus.multi_shard_commit_protocol TO '2pc';
CREATE TABLE test_recovery (x text);
SELECT create_distributed_table('test_recovery', 'x');
 create_distributed_table 
--------------------------
 
(1 row)

INSERT INTO test_recovery VALUES ('hello');
-- Committed DDL commands should write 4 transaction recovery records
BEGIN;
ALTER TABLE test_recovery ADD COLUMN y text;
ROLLBACK;
SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

ALTER TABLE test_recovery ADD COLUMN y text;
SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     4
(1 row)

SELECT recover_prepared_transactions();
 recover_prepared_transactions 
-------------------------------
                             0
(1 row)

SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

-- Committed master_modify_multiple_shards should write 4 transaction recovery records
BEGIN;
SELECT master_modify_multiple_shards($$UPDATE test_recovery SET y = 'world'$$); 
 master_modify_multiple_shards 
-------------------------------
                             1
(1 row)

ROLLBACK;
SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

SELECT master_modify_multiple_shards($$UPDATE test_recovery SET y = 'world'$$);
 master_modify_multiple_shards 
-------------------------------
                             1
(1 row)

SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     4
(1 row)

SELECT recover_prepared_transactions();
 recover_prepared_transactions 
-------------------------------
                             0
(1 row)

SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

-- Committed INSERT..SELECT should write 4 transaction recovery records
BEGIN;
INSERT INTO test_recovery SELECT x, 'earth' FROM test_recovery;
ROLLBACK;
SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

INSERT INTO test_recovery SELECT x, 'earth' FROM test_recovery;
SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     4
(1 row)

SELECT recover_prepared_transactions();
 recover_prepared_transactions 
-------------------------------
                             0
(1 row)

SELECT count(*) FROM pg_dist_transaction;
 count 
-------
     0
(1 row)

\c - - - :master_port
DROP TABLE test_recovery;