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Man Pages


Manual Reference Pages  -  CREATELANG (1)

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NAME

createlang - install a PostgreSQL procedural language

CONTENTS

SYNOPSIS

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

DESCRIPTION

createlang is a utility for adding a procedural language to a PostgreSQL database.

createlang is just a wrapper around the CREATE EXTENSION (CREATE_EXTENSION(7)) SQL command.

Caution

createlang is deprecated and may be removed in a future PostgreSQL release. Direct use of the CREATE 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 the createlang version and exit.

-?
--help

Show help about createlang command line arguments, and exit.

createlang 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 the value begins with a slash, it is used as the directory for the Unix domain socket.

-p port
--port=port

Specifies the TCP 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 createlang to prompt for a password before connecting to a database.

This option is never essential, since createlang 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 other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 31.14, \(lqEnvironment Variables\(rq, in the documentation).

DIAGNOSTICS

Most error messages are self-explanatory. If not, run createlang with the --echo option and see 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 droplang(1) to remove a language.

EXAMPLES

To install the language pltcl into the database template1:

$ createlang pltcl template1

Note that installing the language into template1 will cause it to be automatically installed into subsequently-created databases as well.

SEE ALSO

droplang(1), CREATE EXTENSION (CREATE_EXTENSION(7)), CREATE LANGUAGE (CREATE_LANGUAGE(7))
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PostgreSQL 9.5.2 CREATELANG (1) 2016

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