droplang -- remove a PostgreSQL
droplang [connection-option...] langname [dbname]
droplang [connection-option...] --list | -l dbname
droplang is a utility for removing an
existing programming language from a
droplang can drop any procedural language,
even those not supplied by the PostgreSQL distribution.
Although backend programming languages can be removed directly using
several SQL commands, it is recommended to use
droplang because it performs a number
of checks and is much easier to use. See
droplang accepts the following command line arguments:
Specifies the name of the backend programming language to be removed.
- [-d] dbname
Specifies from which database the language should be removed.
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.
Print the droplang version and exit.
Show help about droplang command line
arguments, and exit.
droplang also accepts
the following command line arguments for connection parameters:
- -h host
Specifies the host name of the machine on which the
is running. If host begins with a slash, it is used
as the directory for the Unix domain socket.
- -p port
Specifies the Internet TCP/IP port or local Unix domain socket file
extension on which the server
is listening for connections.
- -U username
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
Force droplang to prompt for a
password before connecting to a database.
This option is never essential, since
droplang will automatically prompt
for a password if the server demands password authentication.
However, droplang 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
Default connection parameters
This utility, like most other PostgreSQL utilities,
also uses the environment variables supported by libpq
(see Section 31.13).
Most error messages are self-explanatory. If not, run
droplang 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.
To remove the language pltcl:
$ droplang pltcl dbname