![]() schema_name: Use this to specify the schema’s name in which to install the extension’s object, and the named schema must already exist.As can be seen from the illustration above, mysql_fdw is used as the extension name. extension_name: This is the name of the extension to be installed.IF NOT EXISTS: This is used to instruct the server to issue a notification to you instead of returning an error if an extension with the same name already exists.Here is the list of parameters used in this step to connect MySQL to PostgreSQL: ![]() To create an extension to connect to MySQL, create the mysql_fdw extension to connect to the Postgres database from which you will query the MySQL server by inputting mysql_fdw as the extension_name. The user who runs CREATE EXTENSION becomes the owner of the extension. It creates new SQL objects such as functions, data types, operators, and index support methods. In the first step of using Foreign Data Wrapper to connect MySQL to PostgreSQL, the CREATE EXTENSION command is used to load a new extension to a current database, and there must not be an extension of the same name already loaded.
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