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