Example: Using the MySQL Foreign Data Wrapper v2.6.0

Access data from Advanced Server and connect to psql. Once you are connected to psql, follow the below steps:

-- load extension first time after install
CREATE EXTENSION mysql_fdw;

-- create server object
CREATE SERVER mysql_server
         FOREIGN DATA WRAPPER mysql_fdw
         OPTIONS (host '127.0.0.1', port '3306');

-- create user mapping
CREATE USER MAPPING FOR enterprisedb
    SERVER mysql_server OPTIONS (username 'foo', password 'bar');

-- create foreign table
CREATE FOREIGN TABLE warehouse
(
 warehouse_id      INT,
 warehouse_name    TEXT,
 warehouse_created TIMESTAMP
)
SERVER mysql_server
         OPTIONS (dbname 'db', table_name 'warehouse');

-- insert new rows in table
INSERT INTO warehouse values (1, 'UPS', current_date);
INSERT INTO warehouse values (2, 'TV', current_date);
INSERT INTO warehouse values (3, 'Table', current_date);

-- select from table
SELECT * FROM warehouse ORDER BY 1;

warehouse_id | warehouse_name | warehouse_created
-------------+----------------+-------------------
           1 | UPS            | 10-JUL-20 00:00:00
           2 | TV             | 10-JUL-20 00:00:00
           3 | Table          | 10-JUL-20 00:00:00

-- delete row from table
DELETE FROM warehouse where warehouse_id = 3;

-- update a row of table
UPDATE warehouse set warehouse_name = 'UPS_NEW' where warehouse_id = 1;

-- explain a table with verbose option
EXPLAIN VERBOSE SELECT warehouse_id, warehouse_name FROM warehouse WHERE warehouse_name LIKE 'TV' limit 1;

                                                   QUERY PLAN
----------------------------------------------------------------------------------------------------------------
Limit  (cost=10.00..11.00 rows=1 width=36)
       Output: warehouse_id, warehouse_name
       ->  Foreign Scan on public.warehouse  (cost=10.00..1010.00 rows=1000 width=36)
               Output: warehouse_id, warehouse_name
               Local server startup cost: 10
               Remote query: SELECT `warehouse_id`, `warehouse_name` FROM `db`.`warehouse` WHERE ((`warehouse_name` LIKE BINARY 'TV'))

-- drop foreign table
DROP FOREIGN TABLE warehouse;

-- drop user mapping
DROP USER MAPPING FOR enterprisedb SERVER mysql_server;

-- drop server
DROP SERVER mysql_server;