createlang - define a new PostgreSQL procedural language
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 is just a wrapper around the CREATE
LANGUAGE [create_language(7)] command.
createlang accepts the following command-line arguments:
Specifies the name of the procedural programming language to be
Specifies to which database the language should be added. The
default is to use the database with the same name as the current
--echo Display SQL commands as they are executed.
--list Show a list of already installed languages in the target
createlang also accepts the following command-line arguments for
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.
Never issue a password prompt. If the server requires password
authentication and a password is not available by other means
such as a .pgpass file, the connection attempt will fail. This
option can be useful in batch jobs and scripts where no user is
present to enter a password.
Force createlang to prompt for a password before connecting to a
This option is never essential, since createlang will
automatically prompt for a password if the server demands
password authentication. However, createlang will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing -W to avoid the extra
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the
environment variables supported by libpq (see in the documentation).
Most error messages are self-explanatory. If not, run createlang with
the --echo option and see under the respective SQL command for details.
Also, any default connection settings and environment variables used by
the libpq front-end library will apply.
Use droplang(1) to remove a language.
To install the language pltcl into the database template1:
$ createlang pltcl template1
Note that installing the language into template1 will cause it to be
automatically installed into subsequently-created databases as well.
droplang(1), CREATE LANGUAGE [create_language(7)]