SET citus.next_shard_id TO 1220000;
-- Tests functions related to cluster membership
-- before starting the test, lets try to create reference table and see a 
-- meaningful error
CREATE TABLE test_reference_table (y int primary key, name text);
SELECT create_reference_table('test_reference_table');
ERROR:  cannot create reference table "test_reference_table"
DETAIL:  There are no active worker nodes.
-- add the nodes to the cluster
SELECT 1 FROM master_add_node('localhost', :worker_1_port);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

-- get the active nodes
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57638)
 (localhost,57637)
(2 rows)

-- try to add a node that is already in the cluster
SELECT * FROM master_add_node('localhost', :worker_1_port);
 master_add_node 
-----------------
               1
(1 row)

-- get the active nodes
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57638)
 (localhost,57637)
(2 rows)

-- try to remove a node (with no placements)
SELECT master_remove_node('localhost', :worker_2_port); 
 master_remove_node 
--------------------
 
(1 row)

-- verify that the node has been deleted
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57637)
(1 row)

-- try to disable a node with no placements see that node is removed
SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

SELECT master_disable_node('localhost', :worker_2_port); 
 master_disable_node 
---------------------
 
(1 row)

SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57637)
(1 row)

-- add some shard placements to the cluster
SET citus.shard_count TO 16;
SET citus.shard_replication_factor TO 1;
SELECT * FROM master_activate_node('localhost', :worker_2_port);
 master_activate_node 
----------------------
                    3
(1 row)

CREATE TABLE cluster_management_test (col_1 text, col_2 int);
SELECT create_distributed_table('cluster_management_test', 'col_1', 'hash');
 create_distributed_table 
--------------------------
 
(1 row)

-- see that there are some active placements in the candidate node
SELECT shardid, shardstate, nodename, nodeport FROM pg_dist_shard_placement WHERE nodeport=:worker_2_port;
 shardid | shardstate | nodename  | nodeport 
---------+------------+-----------+----------
 1220001 |          1 | localhost |    57638
 1220003 |          1 | localhost |    57638
 1220005 |          1 | localhost |    57638
 1220007 |          1 | localhost |    57638
 1220009 |          1 | localhost |    57638
 1220011 |          1 | localhost |    57638
 1220013 |          1 | localhost |    57638
 1220015 |          1 | localhost |    57638
(8 rows)

-- try to remove a node with active placements and see that node removal is failed
SELECT master_remove_node('localhost', :worker_2_port); 
ERROR:  you cannot remove the primary node of a node group which has shard placements
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57638)
 (localhost,57637)
(2 rows)

-- insert a row so that master_disable_node() exercises closing connections
INSERT INTO test_reference_table VALUES (1, '1');
-- try to disable a node with active placements see that node is removed
-- observe that a notification is displayed
SELECT master_disable_node('localhost', :worker_2_port); 
NOTICE:  Node localhost:57638 has active shard placements. Some queries may fail after this operation. Use SELECT master_activate_node('localhost', 57638) to activate this node back.
 master_disable_node 
---------------------
 
(1 row)

SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57637)
(1 row)

-- try to disable a node which does not exist and see that an error is thrown
SELECT master_disable_node('localhost.noexist', 2345);
ERROR:  node at "localhost.noexist:2345" does not exist
CREATE USER non_super_user;
NOTICE:  not propagating CREATE ROLE/USER commands to worker nodes
HINT:  Connect to worker nodes directly to manually create all necessary users and roles.
CREATE USER node_metadata_user;
NOTICE:  not propagating CREATE ROLE/USER commands to worker nodes
HINT:  Connect to worker nodes directly to manually create all necessary users and roles.
GRANT EXECUTE ON FUNCTION master_activate_node(text,int) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_add_inactive_node(text,int,int,noderole,name) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_add_node(text,int,int,noderole,name) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_add_secondary_node(text,int,text,int,name) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_disable_node(text,int) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_remove_node(text,int) TO node_metadata_user;
GRANT EXECUTE ON FUNCTION master_update_node(int,text,int,bool,int) TO node_metadata_user;
-- try to manipulate node metadata via non-super user
SET ROLE non_super_user;
SELECT 1 FROM master_initialize_node_metadata();
ERROR:  permission denied for function master_initialize_node_metadata
SELECT 1 FROM master_add_inactive_node('localhost', :worker_2_port + 1);
ERROR:  permission denied for function master_add_inactive_node
SELECT 1 FROM master_activate_node('localhost', :worker_2_port + 1);
ERROR:  permission denied for function master_activate_node
SELECT 1 FROM master_disable_node('localhost', :worker_2_port + 1);
ERROR:  permission denied for function master_disable_node
SELECT 1 FROM master_remove_node('localhost', :worker_2_port + 1);
ERROR:  permission denied for function master_remove_node
SELECT 1 FROM master_add_node('localhost', :worker_2_port + 1);
ERROR:  permission denied for function master_add_node
SELECT 1 FROM master_add_secondary_node('localhost', :worker_2_port + 2, 'localhost', :worker_2_port);
ERROR:  permission denied for function master_add_secondary_node
SELECT master_update_node(nodeid, 'localhost', :worker_2_port + 3) FROM pg_dist_node WHERE nodeport = :worker_2_port;
ERROR:  permission denied for function master_update_node
-- try to manipulate node metadata via privileged user
SET ROLE node_metadata_user;
BEGIN;
SELECT 1 FROM master_add_inactive_node('localhost', :worker_2_port + 1);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_activate_node('localhost', :worker_2_port + 1);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_disable_node('localhost', :worker_2_port + 1);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_remove_node('localhost', :worker_2_port + 1);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port + 1);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_add_secondary_node('localhost', :worker_2_port + 2, 'localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

SELECT master_update_node(nodeid, 'localhost', :worker_2_port + 3) FROM pg_dist_node WHERE nodeport = :worker_2_port;
 master_update_node 
--------------------
 
(1 row)

SELECT nodename, nodeport, noderole FROM pg_dist_node ORDER BY nodeport;
 nodename  | nodeport | noderole  
-----------+----------+-----------
 localhost |    57637 | primary
 localhost |    57639 | primary
 localhost |    57640 | secondary
 localhost |    57641 | primary
(4 rows)

ABORT;
\c - postgres - :master_port
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57637)
(1 row)

-- restore the node for next tests
SELECT * FROM master_activate_node('localhost', :worker_2_port);
 master_activate_node 
----------------------
                    3
(1 row)

-- try to remove a node with active placements and see that node removal is failed
SELECT master_remove_node('localhost', :worker_2_port); 
ERROR:  you cannot remove the primary node of a node group which has shard placements
-- mark all placements in the candidate node as inactive
SELECT groupid AS worker_2_group FROM pg_dist_node WHERE nodeport=:worker_2_port \gset
UPDATE pg_dist_placement SET shardstate=3 WHERE groupid=:worker_2_group;
SELECT shardid, shardstate, nodename, nodeport FROM pg_dist_shard_placement WHERE nodeport=:worker_2_port;
 shardid | shardstate | nodename  | nodeport 
---------+------------+-----------+----------
 1220001 |          3 | localhost |    57638
 1220003 |          3 | localhost |    57638
 1220005 |          3 | localhost |    57638
 1220007 |          3 | localhost |    57638
 1220009 |          3 | localhost |    57638
 1220011 |          3 | localhost |    57638
 1220013 |          3 | localhost |    57638
 1220015 |          3 | localhost |    57638
(8 rows)

-- try to remove a node with only inactive placements and see that removal still fails
SELECT master_remove_node('localhost', :worker_2_port); 
ERROR:  you cannot remove the primary node of a node group which has shard placements
SELECT master_get_active_worker_nodes();
 master_get_active_worker_nodes 
--------------------------------
 (localhost,57638)
 (localhost,57637)
(2 rows)

-- clean-up
SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

UPDATE pg_dist_placement SET shardstate=1 WHERE groupid=:worker_2_group;
-- when there is no primary we should get a pretty error
UPDATE pg_dist_node SET noderole = 'secondary' WHERE nodeport=:worker_2_port;
SELECT * FROM cluster_management_test;
ERROR:  node group 3 does not have a primary node
-- when there is no node at all in the group we should get a different error
DELETE FROM pg_dist_node WHERE nodeport=:worker_2_port;
SELECT * FROM cluster_management_test;
ERROR:  there is a shard placement in node group 3 but there are no nodes in that group
-- clean-up
SELECT master_add_node('localhost', :worker_2_port) AS new_node \gset
SELECT groupid AS new_group FROM pg_dist_node WHERE nodeid = :new_node \gset
UPDATE pg_dist_placement SET groupid = :new_group WHERE groupid = :worker_2_group;
-- test that you are allowed to remove secondary nodes even if there are placements
SELECT 1 FROM master_add_node('localhost', 9990, groupid => :new_group, noderole => 'secondary');
 ?column? 
----------
        1
(1 row)

SELECT master_remove_node('localhost', :worker_2_port);
ERROR:  you cannot remove the primary node of a node group which has shard placements
SELECT master_remove_node('localhost', 9990);
 master_remove_node 
--------------------
 
(1 row)

-- clean-up
DROP TABLE cluster_management_test;
-- check that adding/removing nodes are propagated to nodes with metadata
SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

SELECT start_metadata_sync_to_node('localhost', :worker_1_port);
 start_metadata_sync_to_node 
-----------------------------
 
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

\c - - - :worker_1_port
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename  | nodeport 
-----------+----------
 localhost |    57638
(1 row)

\c - - - :master_port
SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

\c - - - :worker_1_port
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename | nodeport 
----------+----------
(0 rows)

\c - - - :master_port
-- check that added nodes are not propagated to nodes without metadata
SELECT stop_metadata_sync_to_node('localhost', :worker_1_port);
 stop_metadata_sync_to_node 
----------------------------
 
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

\c - - - :worker_1_port
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename | nodeport 
----------+----------
(0 rows)

\c - - - :master_port
-- check that removing two nodes in the same transaction works
SELECT 
	master_remove_node('localhost', :worker_1_port), 
	master_remove_node('localhost', :worker_2_port);
 master_remove_node | master_remove_node 
--------------------+--------------------
                    | 
(1 row)

SELECT count(1) FROM pg_dist_node;
 count 
-------
     0
(1 row)

-- check that adding two nodes in the same transaction works
SELECT
	master_add_node('localhost', :worker_1_port),
	master_add_node('localhost', :worker_2_port);
 master_add_node | master_add_node 
-----------------+-----------------
              11 |              12
(1 row)

SELECT * FROM pg_dist_node ORDER BY nodeid;
 nodeid | groupid | nodename  | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced 
--------+---------+-----------+----------+----------+-------------+----------+----------+-------------+----------------
     11 |       9 | localhost |    57637 | default  | f           | t        | primary  | default     | f
     12 |      10 | localhost |    57638 | default  | f           | t        | primary  | default     | f
(2 rows)

-- check that mixed add/remove node commands work fine inside transaction
BEGIN;
SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

COMMIT;
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename | nodeport 
----------+----------
(0 rows)

SELECT start_metadata_sync_to_node('localhost', :worker_1_port);
 start_metadata_sync_to_node 
-----------------------------
 
(1 row)

BEGIN;
SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

COMMIT;
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename  | nodeport 
-----------+----------
 localhost |    57638
(1 row)

\c - - - :worker_1_port
SELECT nodename, nodeport FROM pg_dist_node WHERE nodename='localhost' AND nodeport=:worker_2_port;
 nodename  | nodeport 
-----------+----------
 localhost |    57638
(1 row)

\c - - - :master_port
SELECT master_remove_node(nodename, nodeport) FROM pg_dist_node;
 master_remove_node 
--------------------
 
 
(2 rows)

SELECT 1 FROM master_add_node('localhost', :worker_1_port);
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

-- check that a distributed table can be created after adding a node in a transaction
SET citus.shard_count TO 4;
SELECT master_remove_node('localhost', :worker_2_port);
 master_remove_node 
--------------------
 
(1 row)

BEGIN;
SELECT 1 FROM master_add_node('localhost', :worker_2_port);
 ?column? 
----------
        1
(1 row)

CREATE TABLE temp(col1 text, col2 int);
SELECT create_distributed_table('temp', 'col1');
 create_distributed_table 
--------------------------
 
(1 row)

INSERT INTO temp VALUES ('row1', 1);
INSERT INTO temp VALUES ('row2', 2);
COMMIT;
SELECT col1, col2 FROM temp ORDER BY col1;
 col1 | col2 
------+------
 row1 |    1
 row2 |    2
(2 rows)

SELECT 
	count(*) 
FROM 
	pg_dist_shard_placement, pg_dist_shard 
WHERE 
	pg_dist_shard_placement.shardid = pg_dist_shard.shardid
	AND pg_dist_shard.logicalrelid = 'temp'::regclass
	AND pg_dist_shard_placement.nodeport = :worker_2_port;
 count 
-------
     4
(1 row)

	
DROP TABLE temp;
\c - - - :worker_1_port
DELETE FROM pg_dist_partition;
DELETE FROM pg_dist_shard;
DELETE FROM pg_dist_placement;
DELETE FROM pg_dist_node;
\c - - - :master_port
SELECT stop_metadata_sync_to_node('localhost', :worker_1_port);
 stop_metadata_sync_to_node 
----------------------------
 
(1 row)

SELECT stop_metadata_sync_to_node('localhost', :worker_2_port);
 stop_metadata_sync_to_node 
----------------------------
 
(1 row)

-- check that you can't add a primary to a non-default cluster
SELECT master_add_node('localhost', 9999, nodecluster => 'olap');
ERROR:  primaries must be added to the default cluster
-- check that you can't add more than one primary to a group
SELECT groupid AS worker_1_group FROM pg_dist_node WHERE nodeport = :worker_1_port \gset
SELECT master_add_node('localhost', 9999, groupid => :worker_1_group, noderole => 'primary');
ERROR:  group 14 already has a primary node
-- check that you can add secondaries and unavailable nodes to a group
SELECT groupid AS worker_2_group FROM pg_dist_node WHERE nodeport = :worker_2_port \gset
SELECT 1 FROM master_add_node('localhost', 9998, groupid => :worker_1_group, noderole => 'secondary');
 ?column? 
----------
        1
(1 row)

SELECT 1 FROM master_add_node('localhost', 9997, groupid => :worker_1_group, noderole => 'unavailable');
 ?column? 
----------
        1
(1 row)

-- add_inactive_node also works with secondaries
SELECT 1 FROM master_add_inactive_node('localhost', 9996, groupid => :worker_2_group, noderole => 'secondary');
 ?column? 
----------
        1
(1 row)

-- check that you can add a seconary to a non-default cluster, and activate it, and remove it
SELECT master_add_inactive_node('localhost', 9999, groupid => :worker_2_group, nodecluster => 'olap', noderole => 'secondary');
 master_add_inactive_node 
--------------------------
                       22
(1 row)

SELECT master_activate_node('localhost', 9999);
 master_activate_node 
----------------------
                   22
(1 row)

SELECT master_disable_node('localhost', 9999);
 master_disable_node 
---------------------
 
(1 row)

SELECT master_remove_node('localhost', 9999);
 master_remove_node 
--------------------
 
(1 row)

-- check that you can't manually add two primaries to a group
INSERT INTO pg_dist_node (nodename, nodeport, groupid, noderole)
  VALUES ('localhost', 5000, :worker_1_group, 'primary');
ERROR:  there cannot be two primary nodes in a group
CONTEXT:  PL/pgSQL function citus_internal.pg_dist_node_trigger_func() line 10 at RAISE
UPDATE pg_dist_node SET noderole = 'primary'
  WHERE groupid = :worker_1_group AND nodeport = 9998;
ERROR:  there cannot be two primary nodes in a group
CONTEXT:  PL/pgSQL function citus_internal.pg_dist_node_trigger_func() line 18 at RAISE
-- check that you can't manually add a primary to a non-default cluster
INSERT INTO pg_dist_node (nodename, nodeport, groupid, noderole, nodecluster)
  VALUES ('localhost', 5000, 1000, 'primary', 'olap');
ERROR:  new row for relation "pg_dist_node" violates check constraint "primaries_are_only_allowed_in_the_default_cluster"
DETAIL:  Failing row contains (19, 1000, localhost, 5000, default, f, t, primary, olap, f).
UPDATE pg_dist_node SET nodecluster = 'olap'
  WHERE nodeport = :worker_1_port;
ERROR:  new row for relation "pg_dist_node" violates check constraint "primaries_are_only_allowed_in_the_default_cluster"
DETAIL:  Failing row contains (16, 14, localhost, 57637, default, f, t, primary, olap, f).
-- check that you /can/ add a secondary node to a non-default cluster
SELECT groupid AS worker_2_group FROM pg_dist_node WHERE nodeport = :worker_2_port \gset
SELECT master_add_node('localhost', 8888, groupid => :worker_1_group, noderole => 'secondary', nodecluster=> 'olap');
 master_add_node 
-----------------
              23
(1 row)

-- check that super-long cluster names are truncated
SELECT master_add_node('localhost', 8887, groupid => :worker_1_group, noderole => 'secondary', nodecluster=>
	'thisisasixtyfourcharacterstringrepeatedfourtimestomake256chars.'
	'thisisasixtyfourcharacterstringrepeatedfourtimestomake256chars.'
	'thisisasixtyfourcharacterstringrepeatedfourtimestomake256chars.'
	'thisisasixtyfourcharacterstringrepeatedfourtimestomake256chars.'
	'overflow'
);
 master_add_node 
-----------------
              24
(1 row)

SELECT * FROM pg_dist_node WHERE nodeport=8887;
 nodeid | groupid | nodename  | nodeport | noderack | hasmetadata | isactive | noderole  |                           nodecluster                           | metadatasynced 
--------+---------+-----------+----------+----------+-------------+----------+-----------+-----------------------------------------------------------------+----------------
     24 |      14 | localhost |     8887 | default  | f           | t        | secondary | thisisasixtyfourcharacterstringrepeatedfourtimestomake256chars. | f
(1 row)

-- don't remove the secondary and unavailable nodes, check that no commands are sent to
-- them in any of the remaining tests
-- master_add_secondary_node lets you skip looking up the groupid
SELECT master_add_secondary_node('localhost', 9995, 'localhost', :worker_1_port);
 master_add_secondary_node 
---------------------------
                        25
(1 row)

SELECT master_add_secondary_node('localhost', 9994, primaryname => 'localhost', primaryport => :worker_2_port);
 master_add_secondary_node 
---------------------------
                        26
(1 row)

SELECT master_add_secondary_node('localhost', 9993, 'localhost', 2000);
ERROR:  node at "localhost:2000" does not exist
SELECT master_add_secondary_node('localhost', 9992, 'localhost', :worker_1_port, nodecluster => 'second-cluster');
 master_add_secondary_node 
---------------------------
                        27
(1 row)

SELECT nodeid AS worker_1_node FROM pg_dist_node WHERE nodeport=:worker_1_port \gset
-- master_update_node checks node exists
SELECT master_update_node(100, 'localhost', 8000);
ERROR:  node 100 not found
-- master_update_node disallows aliasing existing node
SELECT master_update_node(:worker_1_node, 'localhost', :worker_2_port);
ERROR:  there is already another node with the specified hostname and port
-- master_update_node moves a node
SELECT master_update_node(:worker_1_node, 'somehost', 9000);
 master_update_node 
--------------------
 
(1 row)

SELECT * FROM pg_dist_node WHERE nodeid = :worker_1_node;
 nodeid | groupid | nodename | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced 
--------+---------+----------+----------+----------+-------------+----------+----------+-------------+----------------
     16 |      14 | somehost |     9000 | default  | f           | t        | primary  | default     | f
(1 row)

-- cleanup
SELECT master_update_node(:worker_1_node, 'localhost', :worker_1_port);
 master_update_node 
--------------------
 
(1 row)

SELECT * FROM pg_dist_node WHERE nodeid = :worker_1_node;
 nodeid | groupid | nodename  | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced 
--------+---------+-----------+----------+----------+-------------+----------+----------+-------------+----------------
     16 |      14 | localhost |    57637 | default  | f           | t        | primary  | default     | f
(1 row)