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droplang

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 procedural language from a PostgreSQL database.

droplang is just a wrapper around the DROP EXTENSION SQL command.

Caution

droplang is deprecated and may be removed in a future PostgreSQL release. Direct use of the DROP EXTENSION command is recommended instead.

Options

droplang accepts the following command line arguments:

langname

Specifies the name of the procedural language to be removed. (This name is lower-cased.)

[-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.

-V
--version

Print the droplang version and exit.

-?
--help

Show help about droplang command line arguments, and exit.

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 Section 31.14).

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 to add a language.

Examples

To remove the language pltcl:

$ droplang pltcl dbname
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