NAME
droplang - remove a PostgreSQL procedural language
SYNOPSIS
droplang [ connection-option... ] langname [ dbname ]
droplang [ connection-option... ] [ --list ] [ -l ] dbname
DESCRIPTION
droplang is a utility for removing an existing programming language
from a PostgreSQL database. 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 DROP
LANGUAGE [drop_language(7)] for more.
OPTIONS
droplang accepts the following command line arguments:
langname
Specifies the name of the backend programming language to be
removed.
[-d] dbname
[--dbname] 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.
-e
--echo Display SQL commands as they are executed.
-l
--list Show a list of already installed languages in the target
database.
droplang 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 host begins with a slash, it is used as the
directory for the Unix domain socket.
-p port
--port port
Specifies the Internet TCP/IP 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 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.
ENVIRONMENT
PGDATABASE
PGHOST
PGPORT
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the
environment variables supported by libpq (see in the documentation).
DIAGNOSTICS
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.
NOTES
Use createlang(1) to add a language.
EXAMPLES
To remove the language pltcl:
$ droplang pltcl dbname
SEE ALSO
createlang(1), DROP LANGUAGE [drop_language(7)]