mirror of https://github.com/citusdata/citus.git
182 lines
6.1 KiB
Plaintext
182 lines
6.1 KiB
Plaintext
\c - - - :master_port
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-- do some setup
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SELECT 1 FROM master_add_node('localhost', :worker_1_port);
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?column?
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---------------------------------------------------------------------
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1
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(1 row)
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SELECT 1 FROM master_add_node('localhost', :worker_2_port);
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?column?
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---------------------------------------------------------------------
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1
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(1 row)
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CREATE TABLE the_table (a int, b int);
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SELECT create_distributed_table('the_table', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO the_table (a, b) VALUES (1, 1);
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INSERT INTO the_table (a, b) VALUES (1, 2);
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CREATE TABLE stock (
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s_w_id int NOT NULL,
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s_i_id int NOT NULL,
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s_order_cnt int NOT NULL
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);
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SELECT create_distributed_table('stock','s_w_id');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO stock SELECT c, c, c FROM generate_series(1, 5) as c;
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SET citus.enable_repartition_joins TO ON;
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SELECT count(*) FROM the_table t1 JOIN the_table t2 USING(b);
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count
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---------------------------------------------------------------------
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2
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(1 row)
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SET citus.enable_single_hash_repartition_joins TO ON;
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SELECT count(*) FROM the_table t1 , the_table t2 WHERE t1.a = t2.b;
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count
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---------------------------------------------------------------------
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2
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(1 row)
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RESET citus.enable_repartition_joins;
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-- connect to the follower and check that a simple select query works, the follower
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-- is still in the default cluster and will send queries to the primary nodes
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\c - - - :follower_master_port
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SELECT * FROM the_table;
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a | b
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---------------------------------------------------------------------
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1 | 1
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1 | 2
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(2 rows)
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select s_i_id, sum(s_order_cnt) as ordercount
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from stock
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group by s_i_id
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having sum(s_order_cnt) > (select max(s_order_cnt) - 3 as having_query from stock)
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order by s_i_id;
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s_i_id | ordercount
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---------------------------------------------------------------------
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3 | 3
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4 | 4
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5 | 5
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(3 rows)
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-- now, connect to the follower but tell it to use secondary nodes. There are no
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-- secondary nodes so this should fail.
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-- (this is :follower_master_port but substitution doesn't work here)
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\c "port=9070 dbname=regression options='-c\ citus.use_secondary_nodes=always'"
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SELECT * FROM the_table;
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ERROR: node group does not have a secondary node
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-- add the secondary nodes and try again, the SELECT statement should work this time
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\c -reuse-previous=off regression - - :master_port
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SELECT 1 FROM master_add_node('localhost', :follower_worker_1_port,
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groupid => (SELECT groupid FROM pg_dist_node WHERE nodeport = :worker_1_port),
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noderole => 'secondary');
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?column?
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---------------------------------------------------------------------
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1
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(1 row)
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SELECT 1 FROM master_add_node('localhost', :follower_worker_2_port,
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groupid => (SELECT groupid FROM pg_dist_node WHERE nodeport = :worker_2_port),
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noderole => 'secondary');
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?column?
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---------------------------------------------------------------------
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1
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(1 row)
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\c "port=9070 dbname=regression options='-c\ citus.use_secondary_nodes=always'"
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-- now that we've added secondaries this should work
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SELECT * FROM the_table;
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a | b
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---------------------------------------------------------------------
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1 | 1
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1 | 2
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(2 rows)
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select s_i_id, sum(s_order_cnt) as ordercount
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from stock
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group by s_i_id
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having sum(s_order_cnt) > (select max(s_order_cnt) - 3 as having_query from stock)
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order by s_i_id;
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s_i_id | ordercount
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---------------------------------------------------------------------
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3 | 3
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4 | 4
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5 | 5
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(3 rows)
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SET citus.enable_repartition_joins TO ON;
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SELECT count(*) FROM the_table t1 JOIN the_table t2 USING(b);
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count
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---------------------------------------------------------------------
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2
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(1 row)
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SET citus.enable_single_hash_repartition_joins TO ON;
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SELECT count(*) FROM the_table t1 , the_table t2 WHERE t1.a = t2.b;
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count
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---------------------------------------------------------------------
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2
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(1 row)
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SELECT
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node_name, node_port
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FROM
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master_get_active_worker_nodes()
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ORDER BY
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node_name, node_port;
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node_name | node_port
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---------------------------------------------------------------------
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localhost | 9071
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localhost | 9072
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(2 rows)
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-- okay, now let's play with nodecluster. If we change the cluster of our follower node
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-- queries should stat failing again, since there are no worker nodes in the new cluster
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\c "port=9070 dbname=regression options='-c\ citus.use_secondary_nodes=always\ -c\ citus.cluster_name=second-cluster'"
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-- there are no secondary nodes in this cluster, so this should fail!
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SELECT * FROM the_table;
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ERROR: there is a shard placement in node group but there are no nodes in that group
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select s_i_id, sum(s_order_cnt) as ordercount
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from stock
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group by s_i_id
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having sum(s_order_cnt) > (select max(s_order_cnt) - 3 as having_query from stock)
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order by s_i_id;
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ERROR: there is a shard placement in node group but there are no nodes in that group
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-- now move the secondary nodes into the new cluster and see that the follower, finally
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-- correctly configured, can run select queries involving them
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\c -reuse-previous=off regression - - :master_port
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UPDATE pg_dist_node SET nodecluster = 'second-cluster' WHERE noderole = 'secondary';
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\c "port=9070 dbname=regression options='-c\ citus.use_secondary_nodes=always\ -c\ citus.cluster_name=second-cluster'"
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SELECT * FROM the_table;
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a | b
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---------------------------------------------------------------------
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1 | 1
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1 | 2
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(2 rows)
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-- Check for connectivity in the cluster
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SELECT * FROM citus_check_cluster_node_health();
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from_nodename | from_nodeport | to_nodename | to_nodeport | result
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---------------------------------------------------------------------
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localhost | 9071 | localhost | 9071 | t
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localhost | 9071 | localhost | 9072 | t
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localhost | 9072 | localhost | 9071 | t
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localhost | 9072 | localhost | 9072 | t
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(4 rows)
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-- clean up after ourselves
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\c -reuse-previous=off regression - - :master_port
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DROP TABLE the_table;
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DROP TABLE stock;
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