createlang
Synopsis
createlang [connection-option...] langname [dbname]
createlang [connection-option...] --list | -l [dbname]
Description
createlang is a utility for adding a procedural language to a PostgreSQL database.
createlang is just a wrapper around the CREATE EXTENSION SQL command.
| Caution |
createlang is deprecated and may be removed in a future PostgreSQL release. Direct use of the CREATE EXTENSION command is recommended instead. |
Options
createlang accepts the following command-line arguments:
- langname
Specifies the name of the procedural language to be installed. (This name is lower-cased.)
- [-d] dbname
[--dbname=]dbname Specifies the database to which the language should be added. The default is to use the database with the same name as the current system user.
- -e
--echo Display SQL commands as they are executed.
- -l
--list Show a list of already installed languages in the target database.
- -V
--version Print the createlang version and exit.
- -?
--help Show help about createlang command line arguments, and exit.
createlang also accepts the following command-line arguments for connection parameters:
- -h host
--host=host 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.
- -p port
--port=port Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
- -U username
--username=username User name to connect as.
- -w
--no-password 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.
- -W
--password Force createlang to prompt for a password before connecting to a database.
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 connection attempt.
Environment
- PGDATABASE
PGHOST
PGPORT
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 31.14).
Diagnostics
Most error messages are self-explanatory. If not, run createlang with the --echo option and see the respective SQL command for details. Also, any default connection settings and environment variables used by the libpq front-end library will apply.