droplang 1 Application droplang remove a PostgreSQL procedural language droplang 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 for more. 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. PGDATABASE PGHOST PGPORT PGUSER Default connection parameters This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see ). 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 to add a language. To remove the language pltcl: $ droplang pltcl dbname