createlang [connection-options] [langname] [dbname]
createlang [connection-options] --list | -l [dbname]
Specifies which database the language should be added.
Specifies the name of the backend programming language to be defined. createlang will prompt for langname if it is not specified on the command line.
Shows a list of already installed languages in the target database (which must be specified).
Specifies the hostname of the machine on which the postmaster is running. If host begins with a slash, it is used as the directory for the UNIX domain socket.
Specifies the Internet TCP/IP port or local UNIX domain socket file extension on which the postmaster is listening for connections.
Username to connect as.
Force password prompt.
createlang is a utility for adding a new programming language to a PostgreSQL database. createlang currently accepts several languages, plpgsql, pltcl, pltclu, and plperl.
Although backend programming languages can be added directly using several SQL commands, it is recommended that you use createlang because it performs a number of checks and is much easier to use.