|The PostgreSQL 9.0 Reference Manual - Volume 1B - SQL Command Reference
by The PostgreSQL Global Development Group
Paperback (6"x9"), 488 pages
RRP £14.95 ($19.95)
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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 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
droplang accepts the following command line arguments:
- Specifies the name of the backend programming language to be removed.
- 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:
- 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.
- Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.
- 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 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
-Wto avoid the extra connection attempt.
- Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Volume 2: Environment Variables).
Most error messages are self-explanatory. If not, run
droplang with the
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.
createlang to add a language.
To remove the language
$ droplang pltcl dbname
|ISBN 9781906966058||The PostgreSQL 9.0 Reference Manual - Volume 1B - SQL Command Reference||See the print edition|