mirror of https://github.com/citusdata/citus.git
491 lines
13 KiB
Plaintext
491 lines
13 KiB
Plaintext
SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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SET citus.shard_count = 2;
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SET citus.shard_replication_factor = 1; -- one shard per worker
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SET citus.next_shard_id TO 103400;
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ALTER SEQUENCE pg_catalog.pg_dist_placement_placementid_seq RESTART 100;
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CREATE TABLE dml_test (id integer, name text);
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SELECT create_distributed_table('dml_test', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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COPY dml_test FROM STDIN WITH CSV;
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SELECT citus.clear_network_traffic();
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clear_network_traffic
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-----------------------
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(1 row)
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---- test multiple statements spanning multiple shards,
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---- at each significant point. These transactions are 2pc
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-- fail at DELETE
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SELECT citus.mitmproxy('conn.onQuery(query="^DELETE").kill()');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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ERROR: connection error: localhost:xxxxx
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DETAIL: server closed the connection unexpectedly
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This probably means the server terminated abnormally
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before or while processing the request.
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DELETE FROM dml_test WHERE id = 2;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes performed in failed transaction
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- cancel at DELETE
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SELECT citus.mitmproxy('conn.onQuery(query="^DELETE").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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ERROR: canceling statement due to user request
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DELETE FROM dml_test WHERE id = 2;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes performed in failed transaction
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- fail at INSERT
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SELECT citus.mitmproxy('conn.onQuery(query="^INSERT").kill()');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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ERROR: connection error: localhost:xxxxx
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DETAIL: server closed the connection unexpectedly
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This probably means the server terminated abnormally
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before or while processing the request.
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes before failed INSERT
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- cancel at INSERT
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SELECT citus.mitmproxy('conn.onQuery(query="^INSERT").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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ERROR: canceling statement due to user request
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes before failed INSERT
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- fail at UPDATE
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SELECT citus.mitmproxy('conn.onQuery(query="^UPDATE").kill()');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: connection error: localhost:xxxxx
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DETAIL: server closed the connection unexpectedly
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This probably means the server terminated abnormally
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before or while processing the request.
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes after failed UPDATE
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- cancel at UPDATE
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SELECT citus.mitmproxy('conn.onQuery(query="^UPDATE").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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ERROR: canceling statement due to user request
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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ERROR: current transaction is aborted, commands ignored until end of transaction block
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COMMIT;
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--- shouldn't see any changes after failed UPDATE
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- fail at PREPARE TRANSACTION
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SELECT citus.mitmproxy('conn.onQuery(query="^PREPARE TRANSACTION").kill()');
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mitmproxy
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-----------
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(1 row)
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-- this transaction block will be sent to the coordinator as a remote command to hide the
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-- error message that is caused during commit.
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-- we'll test for the txn side-effects to ensure it didn't run
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SELECT master_run_on_worker(
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ARRAY['localhost']::text[],
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ARRAY[:master_port]::int[],
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ARRAY['
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, ''Epsilon'');
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UPDATE dml_test SET name = ''alpha'' WHERE id = 1;
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UPDATE dml_test SET name = ''gamma'' WHERE id = 3;
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COMMIT;
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'],
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false
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);
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master_run_on_worker
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---------------------------
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(localhost,57636,t,BEGIN)
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(1 row)
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SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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SELECT shardid FROM pg_dist_shard_placement WHERE shardstate = 3;
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shardid
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---------
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(0 rows)
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SELECT recover_prepared_transactions();
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recover_prepared_transactions
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-------------------------------
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0
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(1 row)
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-- shouldn't see any changes after failed PREPARE
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- cancel at PREPARE TRANSACTION
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SELECT citus.mitmproxy('conn.onQuery(query="^PREPARE TRANSACTION").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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-- we'll test for the txn side-effects to ensure it didn't run
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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ERROR: canceling statement due to user request
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SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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SELECT shardid FROM pg_dist_shard_placement WHERE shardstate = 3;
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shardid
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---------
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(0 rows)
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SELECT recover_prepared_transactions();
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recover_prepared_transactions
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-------------------------------
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0
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(1 row)
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-- shouldn't see any changes after failed PREPARE
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- fail at COMMIT
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SELECT citus.mitmproxy('conn.onQuery(query="^COMMIT").kill()');
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mitmproxy
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-----------
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(1 row)
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-- hide the error message (it has the PID)...
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-- we'll test for the txn side-effects to ensure it didn't run
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SET client_min_messages TO ERROR;
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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SET client_min_messages TO DEFAULT;
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SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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SELECT shardid FROM pg_dist_shard_placement WHERE shardstate = 3;
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shardid
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---------
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(0 rows)
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SELECT recover_prepared_transactions();
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recover_prepared_transactions
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-------------------------------
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1
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(1 row)
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-- should see changes, because of txn recovery
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+---------
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3 | gamma
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4 | Delta
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5 | Epsilon
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(3 rows)
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-- cancel at COMMITs are ignored by Postgres
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SELECT citus.mitmproxy('conn.onQuery(query="^COMMIT").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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-- should see changes, because cancellation is ignored
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+---------
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3 | gamma
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4 | Delta
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5 | Epsilon
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5 | Epsilon
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(4 rows)
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-- drop table and recreate with different replication/sharding
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DROP TABLE dml_test;
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SET citus.shard_count = 1;
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SET citus.shard_replication_factor = 2; -- two placements
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CREATE TABLE dml_test (id integer, name text);
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SELECT create_distributed_table('dml_test', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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COPY dml_test FROM STDIN WITH CSV;
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---- test multiple statements against a single shard, but with two placements
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-- fail at COMMIT (actually COMMIT this time, as no 2pc in use)
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SELECT citus.mitmproxy('conn.onQuery(query="^COMMIT").kill()');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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WARNING: connection not open
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CONTEXT: while executing command on localhost:xxxxx
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WARNING: failed to commit transaction on localhost:xxxxx
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WARNING: connection not open
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CONTEXT: while executing command on localhost:xxxxx
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--- should see all changes, but they only went to one placement (other is unhealthy)
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+---------
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3 | gamma
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4 | Delta
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5 | Epsilon
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(3 rows)
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SELECT shardid FROM pg_dist_shard_placement WHERE shardstate = 3;
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shardid
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---------
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103402
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(1 row)
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SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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-- drop table and recreate as reference table
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DROP TABLE dml_test;
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SET citus.shard_count = 2;
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SET citus.shard_replication_factor = 1;
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CREATE TABLE dml_test (id integer, name text);
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SELECT create_reference_table('dml_test');
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create_reference_table
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------------------------
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(1 row)
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COPY dml_test FROM STDIN WITH CSV;
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-- fail at COMMIT (by failing to PREPARE)
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SELECT citus.mitmproxy('conn.onQuery(query="^PREPARE").kill()');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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ERROR: connection not open
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CONTEXT: while executing command on localhost:xxxxx
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--- shouldn't see any changes after failed COMMIT
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- cancel at COMMIT (by cancelling on PREPARE)
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SELECT citus.mitmproxy('conn.onQuery(query="^PREPARE").cancel(' || pg_backend_pid() || ')');
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mitmproxy
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-----------
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(1 row)
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BEGIN;
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DELETE FROM dml_test WHERE id = 1;
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DELETE FROM dml_test WHERE id = 2;
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INSERT INTO dml_test VALUES (5, 'Epsilon');
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UPDATE dml_test SET name = 'alpha' WHERE id = 1;
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UPDATE dml_test SET name = 'gamma' WHERE id = 3;
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COMMIT;
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ERROR: canceling statement due to user request
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--- shouldn't see any changes after cancelled PREPARE
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SELECT * FROM dml_test ORDER BY id ASC;
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id | name
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----+-------
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1 | Alpha
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2 | Beta
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3 | Gamma
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4 | Delta
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(4 rows)
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-- allow connection to allow DROP
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SELECT citus.mitmproxy('conn.allow()');
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mitmproxy
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-----------
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(1 row)
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DROP TABLE dml_test;
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