mirror of https://github.com/citusdata/citus.git
270 lines
7.4 KiB
Plaintext
270 lines
7.4 KiB
Plaintext
-- Test creation of mx tables and metadata syncing
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-- get rid of the previously created entries in pg_dist_transaction
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-- for the sake of getting consistent results in this test file
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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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CREATE TABLE distributed_mx_table (
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key text primary key,
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value jsonb
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);
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CREATE INDEX ON distributed_mx_table USING GIN (value);
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SET citus.shard_replication_factor TO 1;
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SET citus.replication_model TO streaming;
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SET citus.shard_count TO 4;
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SELECT create_distributed_table('distributed_mx_table', 'key');
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create_distributed_table
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--------------------------
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(1 row)
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-- Verify that we've logged commit records
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SELECT count(*) FROM pg_dist_transaction;
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count
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-------
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5
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(1 row)
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-- Confirm that the metadata transactions have been committed
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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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-- Verify that the commit records have been removed
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SELECT count(*) FROM pg_dist_transaction;
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count
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-------
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3
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(1 row)
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\c - - - :worker_1_port
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\d distributed_mx_table
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Table "public.distributed_mx_table"
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Column | Type | Modifiers
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--------+-------+-----------
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key | text | not null
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value | jsonb |
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Indexes:
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"distributed_mx_table_pkey" PRIMARY KEY, btree (key)
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"distributed_mx_table_value_idx" gin (value)
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SELECT repmodel FROM pg_dist_partition
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WHERE logicalrelid = 'distributed_mx_table'::regclass;
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repmodel
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----------
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s
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(1 row)
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SELECT count(*) FROM pg_dist_shard JOIN pg_dist_shard_placement USING (shardid)
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WHERE logicalrelid = 'distributed_mx_table'::regclass;
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count
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-------
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4
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(1 row)
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\c - - - :worker_2_port
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\d distributed_mx_table
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Table "public.distributed_mx_table"
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Column | Type | Modifiers
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--------+-------+-----------
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key | text | not null
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value | jsonb |
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Indexes:
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"distributed_mx_table_pkey" PRIMARY KEY, btree (key)
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"distributed_mx_table_value_idx" gin (value)
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SELECT repmodel FROM pg_dist_partition
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WHERE logicalrelid = 'distributed_mx_table'::regclass;
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repmodel
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----------
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s
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(1 row)
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SELECT count(*) FROM pg_dist_shard JOIN pg_dist_shard_placement USING (shardid)
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WHERE logicalrelid = 'distributed_mx_table'::regclass;
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count
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-------
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4
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(1 row)
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-- Create a table and then roll back the transaction
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\c - - - :master_port
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SET citus.shard_replication_factor TO 1;
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SET citus.replication_model TO streaming;
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BEGIN;
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CREATE TABLE should_not_exist (
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key text primary key,
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value jsonb
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);
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SELECT create_distributed_table('should_not_exist', 'key');
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create_distributed_table
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--------------------------
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(1 row)
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ABORT;
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-- Verify that the table does not exist on the worker
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\c - - - :worker_1_port
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SELECT count(*) FROM pg_tables WHERE tablename = 'should_not_exist';
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count
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-------
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0
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(1 row)
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-- Ensure that we don't allow prepare on a metadata transaction
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\c - - - :master_port
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SET citus.shard_replication_factor TO 1;
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SET citus.replication_model TO streaming;
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BEGIN;
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CREATE TABLE should_not_exist (
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key text primary key,
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value jsonb
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);
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SELECT create_distributed_table('should_not_exist', 'key');
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create_distributed_table
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--------------------------
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(1 row)
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PREPARE TRANSACTION 'this_should_fail';
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ERROR: cannot use 2PC in transactions involving multiple servers
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-- now show that we can create tables and schemas withing a single transaction
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BEGIN;
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CREATE SCHEMA IF NOT EXISTS citus_mx_schema_for_xacts;
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SET search_path TO citus_mx_schema_for_xacts;
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SET citus.shard_replication_factor TO 1;
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SET citus.shard_count TO 1;
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CREATE TABLE objects_for_xacts (
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id bigint PRIMARY KEY,
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name text NOT NULL
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);
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SELECT create_distributed_table('objects_for_xacts', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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COMMIT;
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-- see that the table actually created and distributed
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\c - - - :worker_1_port
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SELECT repmodel FROM pg_dist_partition
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WHERE logicalrelid = 'citus_mx_schema_for_xacts.objects_for_xacts'::regclass;
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repmodel
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----------
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s
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(1 row)
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SELECT count(*) FROM pg_dist_shard JOIN pg_dist_shard_placement USING (shardid)
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WHERE logicalrelid = 'citus_mx_schema_for_xacts.objects_for_xacts'::regclass;
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count
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-------
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1
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(1 row)
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\c - - - :master_port
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SET citus.shard_replication_factor TO 1;
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SET citus.replication_model TO streaming;
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-- now show that we can rollback on creating mx table, but shards remain....
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BEGIN;
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CREATE SCHEMA IF NOT EXISTS citus_mx_schema_for_xacts;
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NOTICE: schema "citus_mx_schema_for_xacts" already exists, skipping
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SET search_path TO citus_mx_schema_for_xacts;
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SET citus.shard_replication_factor TO 1;
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SET citus.shard_count TO 2;
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CREATE TABLE objects_for_xacts2 (
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id bigint PRIMARY KEY,
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name text NOT NULL
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);
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SELECT create_distributed_table('objects_for_xacts2', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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ROLLBACK;
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-- show that the table not exists on the coordinator
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SELECT count(*) FROM pg_tables WHERE tablename = 'objects_for_xacts2' and schemaname = 'citus_mx_schema_for_xacts';
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count
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-------
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0
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(1 row)
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\c - - - :worker_1_port
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-- the distributed table not exists on the worker node
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SELECT count(*) FROM pg_tables WHERE tablename = 'objects_for_xacts2' and schemaname = 'citus_mx_schema_for_xacts';
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count
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-------
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0
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(1 row)
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-- but the shard exists since we do not create shards in a transaction
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SELECT count(*) FROM pg_tables WHERE tablename LIKE 'objects_for_xacts2_%' and schemaname = 'citus_mx_schema_for_xacts';
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count
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-------
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1
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(1 row)
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-- make sure that master_drop_all_shards does not work from the worker nodes
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SELECT master_drop_all_shards('citus_mx_schema_for_xacts.objects_for_xacts'::regclass, 'citus_mx_schema_for_xacts', 'objects_for_xacts');
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ERROR: operation is not allowed on this node
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HINT: Connect to the coordinator and run it again.
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-- Ensure pg_dist_transaction is empty for test
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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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-- Create some "fake" prepared transactions to recover
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\c - - - :worker_1_port
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BEGIN;
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CREATE TABLE should_abort (value int);
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PREPARE TRANSACTION 'citus_0_should_abort';
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BEGIN;
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CREATE TABLE should_commit (value int);
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PREPARE TRANSACTION 'citus_0_should_commit';
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BEGIN;
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CREATE TABLE should_be_sorted_into_middle (value int);
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PREPARE TRANSACTION 'citus_0_should_be_sorted_into_middle';
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\c - - - :master_port
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-- Add "fake" pg_dist_transaction records and run recovery
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INSERT INTO pg_dist_transaction VALUES (12, 'citus_0_should_commit');
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INSERT INTO pg_dist_transaction VALUES (12, 'citus_0_should_be_forgotten');
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SELECT recover_prepared_transactions();
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NOTICE: recovered a prepared transaction on localhost:57637
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CONTEXT: ROLLBACK PREPARED 'citus_0_should_abort'
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NOTICE: recovered a prepared transaction on localhost:57637
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CONTEXT: ROLLBACK PREPARED 'citus_0_should_be_sorted_into_middle'
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NOTICE: recovered a prepared transaction on localhost:57637
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CONTEXT: COMMIT PREPARED 'citus_0_should_commit'
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recover_prepared_transactions
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-------------------------------
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3
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(1 row)
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SELECT count(*) FROM pg_dist_transaction;
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count
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-------
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3
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(1 row)
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-- Confirm that transactions were correctly rolled forward
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\c - - - :worker_1_port
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SELECT count(*) FROM pg_tables WHERE tablename = 'should_abort';
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count
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-------
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0
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(1 row)
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SELECT count(*) FROM pg_tables WHERE tablename = 'should_commit';
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count
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-------
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1
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(1 row)
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