CREATE SERVER
Function
CREATE SERVER defines a new foreign server.
Syntax
CREATE SERVER server_name
FOREIGN DATA WRAPPER fdw_name
OPTIONS ( { option_name ' value ' } [, ...] ) ;
Parameter Description
server_name
Specifies the server name.
Value range: a string containing no more than 63 characters
fdw_name
Specifies the name of the foreign data wrapper.
Value range: oracle_fdw, mysql_fdw, postgres_fdw, mot_fdw
OPTIONS ( { option_name ' value ' } [, …] )
Specifies options for the server. These options typically define the connection details of the server, but the actual names and values depend on the foreign data wrapper of the server.
Options supported by oracle_fdw are as follows:
dbserver
Connection string of the remote Oracle database.
isolation_level (default value: serializable)
Oracle database transaction isolation level.
Value range: serializable, read_committed, read_only
Options supported by mysql_fdw are as follows:
host (default value: 127.0.0.1)
IP address of the MySQL server or MariaDB.
port (default value: 3306)
Listening port number of the MySQL server or MariaDB.
The options supported by postgres_fdw are the same as those supported by libpq. For details, see Connection Character Strings. Note that the following options cannot be set:
user and password
The user name and password are specified when the user mapping is created.
client_encoding
The encoding mode of the local server is automatically obtained and set.
application_name
This option is always set to postgres_fdw.
In addition to the connection parameters supported by libpq, the following options are provided:
use_remote_estimate
Controls whether postgres_fdw issues the EXPLAIN command to obtain the estimated run time. The default value is false.
fdw_startup_cost
Estimates the startup time required for a foreign table scan, including the time to establish a connection, analyze the request at the remote server, and generate a plan. The default value is 100.
fdw_typle_cost
Specifies the additional consumption when each tuple is scanned on a remote server. The value specifies the extra consumption of data transmission between servers. The default value is 0.01.