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createlang
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createlang

createlang — install aPostgres Pro procedural language

Synopsis

createlang [connection-option...]langname [dbname]

createlang [connection-option...]--list |-l [dbname]

Description

createlang is a utility for adding a procedural language to aPostgres Pro database.

createlang is just a wrapper around theCREATE EXTENSION SQL command.

Caution

createlang is deprecated and may be removed in a futurePostgres Pro release. Direct use of theCREATE EXTENSION command is recommended instead.

Options

createlang accepts the following command-line arguments:

langname: Specifies the name of the procedural language to be installed. (This name is lower-cased.)
[-d]dbname [--dbname=]dbname: Specifies the database to which the language should be added. 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 thecreatelang version and exit.
-? --help: Show help aboutcreatelang command line arguments, and exit.

createlang also accepts the following command-line arguments for connection parameters:

-hhost --host=host

Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.

-pport --port=port

Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.

-Uusername --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

Forcecreatelang to prompt for a password before connecting to a database.

This option is never essential, sincecreatelang will automatically prompt for a password if the server demands password authentication. However,createlang 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 otherPostgres Pro utilities, also uses the environment variables supported bylibpq (seeSection 31.14).

Diagnostics

Most error messages are self-explanatory. If not, runcreatelang with the--echo option and see the respectiveSQL command for details. Also, any default connection settings and environment variables used by thelibpq front-end library will apply.

Notes

Use droplang to remove a language.

Examples

To install the languagepltcl into the databasetemplate1:

$createlang pltcl template1

Note that installing the language intotemplate1 will cause it to be automatically installed into subsequently-created databases as well.