|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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dropdb -- remove a PostgreSQL database
dropdb [connection-option...] [option...] dbname
dropdb destroys an existing PostgreSQL database. The user who executes this command must be a database superuser or the owner of the database.
dropdb is a wrapper around the
There is no effective difference between dropping databases via
this utility and via other methods for accessing the server.
dropdb accepts the following command-line arguments:
- Specifies the name of the database to be removed.
- Echo the commands that dropdb generates and sends to the server.
- Issues a verification prompt before doing anything destructive.
- Print the dropdb version and exit.
- Show help about dropdb command line arguments, and exit.
dropdb also accepts the following command-line arguments for connection parameters:
- 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.
- Specifies the TCP 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 dropdb to prompt for a
password before connecting to a database.
This option is never essential, since
dropdb will automatically prompt
for a password if the server demands password authentication.
However, dropdb 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).
In case of difficulty, see
discussions of potential problems and error messages.
The database server must be running at the
targeted host. Also, any default connection settings and environment
variables used by the libpq front-end
library will apply.
To destroy the database
demo on the default
$ dropdb demo
To destroy the database
demo using the
server on host
eden, port 5000, with verification and a peek
at the underlying command:
$ dropdb -p 5000 -h eden -i -e demo Database "demo" will be permanently deleted. Are you sure? (y/n) y DROP DATABASE demo;
|ISBN 9781906966058||The PostgreSQL 9.0 Reference Manual - Volume 1B - SQL Command Reference||See the print edition|