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createlang [connection-option...] langname [dbname]
createlang [connection-option...] --list | -l dbname
createlang is a utility for adding a new programming language to a PostgreSQL database. createlang can handle all the languages supplied in the default PostgreSQL distribution, but not languages provided by other parties.
Although backend programming languages can be added directly using several SQL commands, it is recommended to use createlang because it performs a number of checks and is much easier to use. See CREATE LANGUAGE for additional information.
createlang accepts the following command-line arguments:
Specifies the name of the procedural programming language to be defined.
Specifies to which database the language should be added. The default is to use the database with the same name as the current system user.
Display SQL commands as they are executed.
Show a list of already installed languages in the target database.
Specifies the directory in which the language interpreter is to be found. The directory is normally found automatically; this option is primarily for debugging purposes.
createlang also accepts the following command-line arguments for connection parameters:
Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.
Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
User name to connect as.
Force password prompt.