droplang — remove a PostgreSQL procedural language
droplang [connection-option...] langname [dbname]
droplang [connection-option...] --list | -l [dbname]
droplang is a utility for removing an existing procedural language from a PostgreSQL database.
droplang is just a wrapper around the DROP EXTENSION SQL command.
droplang is deprecated and may be removed
in a future PostgreSQL release. Direct use
of the DROP EXTENSION command is recommended instead.
droplang accepts the following command line arguments:
langnameSpecifies the name of the procedural language to be removed. (This name is lower-cased.)
[-d] dbname[--dbname=]dbnameSpecifies from which database the language should be removed. The default is to use the database with the same name as the current system user.
-e--echoDisplay SQL commands as they are executed.
-l--listShow a list of already installed languages in the target database.
-V--versionPrint the droplang version and exit.
-?--helpShow help about droplang command line arguments, and exit.
droplang also accepts the following command line arguments for connection parameters:
-h host--host=hostSpecifies the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory for the Unix domain socket.
-p port--port=portSpecifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.
-U username--username=usernameUser 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--passwordForce 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
connection attempt.
PGDATABASEPGHOSTPGPORTPGUSERDefault connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 31.14).
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.
Use createlang to add a language.
To remove the language pltcl:
$droplang pltcl dbname