timescaledb/tsl/test/sql/dist_commands.sql

-- This file and its contents are licensed under the Timescale License.
-- Please see the included NOTICE for copyright information and
-- LICENSE-TIMESCALE for a copy of the license.

\c :TEST_DBNAME :ROLE_CLUSTER_SUPERUSER

-- Support for execute_sql_and_filter_server_name_on_error()
\unset ECHO
\o /dev/null
\ir include/remote_exec.sql
\ir include/filter_exec.sql
\o
\set ECHO all

\set DATA_NODE_1 :TEST_DBNAME _1
\set DATA_NODE_2 :TEST_DBNAME _2
\set DATA_NODE_3 :TEST_DBNAME _3

SELECT node_name, database, node_created, database_created, extension_created
FROM (
  SELECT (add_data_node(name, host => 'localhost', DATABASE => name)).*
  FROM (VALUES (:'DATA_NODE_1'), (:'DATA_NODE_2'), (:'DATA_NODE_3')) v(name)
) a;
GRANT USAGE ON FOREIGN SERVER :DATA_NODE_1, :DATA_NODE_2, :DATA_NODE_3 TO PUBLIC;

\des

RESET ROLE;
CREATE FUNCTION _timescaledb_internal.invoke_distributed_commands()
RETURNS void
AS :TSL_MODULE_PATHNAME, 'ts_invoke_distributed_commands'
LANGUAGE C STRICT;

CREATE FUNCTION _timescaledb_internal.invoke_faulty_distributed_command()
RETURNS void
AS :TSL_MODULE_PATHNAME, 'ts_invoke_faulty_distributed_command'
LANGUAGE C STRICT;
SET ROLE :ROLE_1;

SELECT _timescaledb_internal.invoke_distributed_commands();

\c :DATA_NODE_1
\dt
SELECT * FROM disttable1;
\c :DATA_NODE_2
\dt
SELECT * FROM disttable1;
\c :DATA_NODE_3
\dt
SELECT * FROM disttable1;
\c :TEST_DBNAME :ROLE_SUPERUSER
SET ROLE :ROLE_1;

-- Verify failed insert command gets fully rolled back
\set ON_ERROR_STOP 0
SELECT _timescaledb_internal.invoke_faulty_distributed_command();
\set ON_ERROR_STOP 1

\c :DATA_NODE_1
SELECT * from disttable2;
\c :DATA_NODE_2
SELECT * from disttable2;

-- Test connection session identity
\c :TEST_DBNAME :ROLE_SUPERUSER
\unset ECHO
\o /dev/null
\ir include/remote_exec.sql
\o
\set ECHO all

-- Register_is_access_node_session_on_data_node() function and test that it returns false for
-- connections openned by test suite. This simualates behaviour expected
-- with a client connections.
CREATE OR REPLACE FUNCTION is_access_node_session_on_data_node()
RETURNS BOOL
AS :TSL_MODULE_PATHNAME, 'ts_test_dist_util_is_access_node_session_on_data_node' LANGUAGE C;

\c :DATA_NODE_1
CREATE OR REPLACE FUNCTION is_access_node_session_on_data_node()
RETURNS BOOL
AS :TSL_MODULE_PATHNAME, 'ts_test_dist_util_is_access_node_session_on_data_node' LANGUAGE C;
SELECT is_access_node_session_on_data_node();

\c :DATA_NODE_2
CREATE OR REPLACE FUNCTION is_access_node_session_on_data_node()
RETURNS BOOL
AS :TSL_MODULE_PATHNAME, 'ts_test_dist_util_is_access_node_session_on_data_node' LANGUAGE C;
SELECT is_access_node_session_on_data_node();

\c :DATA_NODE_3
CREATE OR REPLACE FUNCTION is_access_node_session_on_data_node()
RETURNS BOOL
AS :TSL_MODULE_PATHNAME, 'ts_test_dist_util_is_access_node_session_on_data_node' LANGUAGE C;
SELECT is_access_node_session_on_data_node();

\c :TEST_DBNAME :ROLE_SUPERUSER
SET ROLE :ROLE_1;
SELECT is_access_node_session_on_data_node();

-- Ensure peer dist id is already set and can be set only once
\set ON_ERROR_STOP 0
SELECT * FROM test.remote_exec(ARRAY[:'DATA_NODE_1'], $$ SELECT * FROM _timescaledb_internal.set_peer_dist_id('77348176-09da-4a80-bc78-e31bdf5e63ec'); $$);
\set ON_ERROR_STOP 1

-- Repeat is_access_node_session_on_data_node() test again, but this time using connections openned from
-- access node to data nodes. Must return true.
SELECT * FROM test.remote_exec(NULL, $$ SELECT is_access_node_session_on_data_node(); $$);

-- Test distributed_exec()

-- Test calling distributed exec via direct function call
RESET ROLE;
CREATE OR REPLACE PROCEDURE distributed_exec_direct_function_call(
       query TEXT,
       node_list name[] = NULL,
       transactional BOOLEAN = TRUE)
AS :TSL_MODULE_PATHNAME, 'ts_test_direct_function_call' LANGUAGE C;
SET ROLE :ROLE_1;

-- Invalid input
\set ON_ERROR_STOP 0
\set VERBOSITY default
BEGIN;
-- Not allowed in transcation block if transactional=false
CALL distributed_exec_direct_function_call('CREATE TABLE dist_test(id int)', NULL, false);
ROLLBACK;
-- multi-dimensional array of data nodes
CALL distributed_exec('CREATE TABLE dist_test(id int)', '{{db_data_node_1}}');
-- Specified, but empty data node array
CALL distributed_exec('CREATE TABLE dist_test(id int)', '{}');
-- Specified, but contains null values
CALL distributed_exec('CREATE TABLE dist_test(id int)', '{db_data_node_1, NULL}');
-- Specified, but not a data node
CALL distributed_exec('CREATE TABLE dist_test(id int)', '{db_data_node_1928}');
\set VERBOSITY terse
\set ON_ERROR_STOP 1

-- Make sure dist session is properly set
CALL distributed_exec('DO $$ BEGIN ASSERT(SELECT is_access_node_session_on_data_node()) = true; END; $$;');

-- Test creating and dropping a table
CALL distributed_exec('CREATE TABLE dist_test (id int)');
CALL distributed_exec('INSERT INTO dist_test values (7)');
-- Test INSERTING data using empty array of data nodes (same behavior as not specifying).
SELECT * FROM test.remote_exec(NULL, $$ SELECT * from dist_test; $$);
CALL distributed_exec('DROP TABLE dist_test');
\set ON_ERROR_STOP 0
CALL distributed_exec('INSERT INTO dist_test VALUES (8)', ARRAY[:'DATA_NODE_1']);
\set ON_ERROR_STOP 1

-- Test creating and dropping a role
CREATE ROLE dist_test_role;
-- Expect this to be an error, since data nodes are created on the same instance
\set ON_ERROR_STOP 0
SELECT test.execute_sql_and_filter_data_node_name_on_error($$
CALL distributed_exec('CREATE ROLE dist_test_role');
$$);
\set ON_ERROR_STOP 1
SELECT * FROM test.remote_exec(NULL, $$ SELECT true from pg_catalog.pg_roles WHERE rolname = 'dist_test_role'; $$);
DROP ROLE DIST_TEST_ROLE;
\set ON_ERROR_STOP 0
SELECT test.execute_sql_and_filter_data_node_name_on_error($$
CALL distributed_exec('DROP ROLE dist_test_role');
$$);
\set ON_ERROR_STOP 1

-- Do not allow to run distributed_exec() on a data nodes
\c :DATA_NODE_1
\set ON_ERROR_STOP 0
CALL distributed_exec('SELECT 1');
\set ON_ERROR_STOP 1

\c :TEST_DBNAME :ROLE_SUPERUSER

-- Test health check function output on access node
SELECT * FROM _timescaledb_internal.health() ORDER BY 1 NULLS FIRST;

SELECT * FROM delete_data_node(:'DATA_NODE_1');
SELECT * FROM delete_data_node(:'DATA_NODE_2');
SELECT * FROM delete_data_node(:'DATA_NODE_3');

-- Test health check when no longer an access node (no data nodes)
SELECT * FROM _timescaledb_internal.health() ORDER BY 1 NULLS FIRST;

DROP DATABASE :DATA_NODE_1;
DROP DATABASE :DATA_NODE_2;
DROP DATABASE :DATA_NODE_3;

\set ON_ERROR_STOP 0
-- Calling distributed_exec without data nodes should fail
CALL distributed_exec('SELECT 1');
CALL distributed_exec('SELECT 1', '{data_node_1}');
\set ON_ERROR_STOP 1

-- Test TS execution on non-TSDB server
CREATE EXTENSION postgres_fdw;
CREATE SERVER myserver FOREIGN DATA WRAPPER postgres_fdw
    OPTIONS (host 'foo', dbname 'foodb', port '5432');
\set ON_ERROR_STOP 0
SELECT * FROM test.remote_exec('{myserver}', $$ SELECT 1; $$);
\set ON_ERROR_STOP 1
DROP SERVER myserver;
DROP EXTENSION postgres_fdw;

-- Test that transactional behaviour is the default and that it can be
-- disabled.
--
-- In this case, we only execute it on one data node since we are
-- creating a database and multiple creations of the database would
-- clash when executed on the same instace.
--
-- We prefix the database names with the test file to be able to
-- parallelize the test. Not possible right now because there are
-- other databases above that prevents this.
\c :TEST_DBNAME :ROLE_SUPERUSER
SELECT node_name, database, node_created, database_created, extension_created FROM add_data_node('dist_commands_1', host => 'localhost', database => :'DATA_NODE_1');
SELECT node_name, database, node_created, database_created, extension_created FROM add_data_node('dist_commands_2', host => 'localhost', database => :'DATA_NODE_2');
GRANT USAGE ON FOREIGN SERVER dist_commands_1, dist_commands_2 TO PUBLIC;

\set ON_ERROR_STOP 0
CALL distributed_exec('CREATE DATABASE dist_commands_magic',
       node_list => '{dist_commands_1}');
\set ON_ERROR_STOP 1
CALL distributed_exec('CREATE DATABASE dist_commands_magic',
       node_list => '{dist_commands_1}', transactional => FALSE);
DROP DATABASE dist_commands_magic;

-- Test that distributed_exec honor the 2PC behaviour when starting a
-- transaction locally. It should also give an error if attempting to
-- execute non-transactionally inside a local transaction.

-- To test that distributed_exec honors transactions, we create a
-- table on both data nodes, and then tweak one of the tables so that
-- we get a duplicate key when updating the table on both data
-- nodes. This should then abort the transaction on all data nodes.
\c :TEST_DBNAME :ROLE_1
CALL distributed_exec($$
  CREATE TABLE my_table (key INT, value TEXT, PRIMARY KEY (key));
$$);

\c :DATA_NODE_1
INSERT INTO my_table VALUES (1, 'foo');

\c :TEST_DBNAME :ROLE_1
\set ON_ERROR_STOP 0
BEGIN;
CALL distributed_exec($$ INSERT INTO my_table VALUES (1, 'bar') $$);
COMMIT;
\set ON_ERROR_STOP 1

-- No changes should be there
SELECT * FROM test.remote_exec(NULL, $$ SELECT * FROM my_table; $$);

-- This should work.
BEGIN;
CALL distributed_exec($$ INSERT INTO my_table VALUES (2, 'bar'); $$);
COMMIT;

-- We should see changes
SELECT * FROM test.remote_exec(NULL, $$ SELECT * FROM my_table; $$);

-- This should fail since we are inside a transaction and asking for
-- transactional execution on the remote nodes. Non-transactional
-- execution should be outside transactions.
\set ON_ERROR_STOP 0
BEGIN;
CALL distributed_exec(
     $$ INSERT INTO my_table VALUES (3, 'baz') $$,
     transactional => FALSE
);
COMMIT;
\set ON_ERROR_STOP 1

-- We should see no changes
SELECT * FROM test.remote_exec(NULL, $$ SELECT * FROM my_table; $$);

\c :TEST_DBNAME :ROLE_CLUSTER_SUPERUSER
DROP DATABASE :DATA_NODE_1;
DROP DATABASE :DATA_NODE_2;