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><H1
><A
NAME="APP-DROPDB"
></A
><SPAN
CLASS="APPLICATION"
>dropdb</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN80960"
></A
><H2
>Name</H2
>dropdb -- remove a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN80966"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>dropdb</TT
> [<TT
CLASS="REPLACEABLE"
><I
>connection-option</I
></TT
>...] [<TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
>...] <TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
> </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN80975"
></A
><H2
>Description</H2
><P
> <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> destroys an existing
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database.
The user who executes this command must be a database
superuser or the owner of the database.
</P
><P
> <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> is a wrapper around the
<ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> command <A
HREF="sql-dropdatabase.html"
>DROP DATABASE</A
>.
There is no effective difference between dropping databases via
this utility and via other methods for accessing the server.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN80984"
></A
><H2
>Options</H2
><P
> <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> accepts the following command-line arguments:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></DT
><DD
><P
> Specifies the name of the database to be removed.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-e</TT
><BR><TT
CLASS="OPTION"
>--echo</TT
></DT
><DD
><P
> Echo the commands that <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> generates
and sends to the server.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-i</TT
><BR><TT
CLASS="OPTION"
>--interactive</TT
></DT
><DD
><P
> Issues a verification prompt before doing anything destructive.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-V</TT
><BR><TT
CLASS="OPTION"
>--version</TT
></DT
><DD
><P
> Print the <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> version and exit.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--if-exists</TT
></DT
><DD
><P
> Do not throw an error if the database does not exist. A notice is issued
in this case.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-?</TT
><BR><TT
CLASS="OPTION"
>--help</TT
></DT
><DD
><P
> Show help about <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> command line
arguments, and exit.
</P
></DD
></DL
></DIV
><P>
</P
><P
> <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> also accepts the following
command-line arguments for connection parameters:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-h <TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--host=<TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
></DT
><DD
><P
> 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
></DD
><DT
><TT
CLASS="OPTION"
>-p <TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--port=<TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
></DT
><DD
><P
> Specifies the TCP port or local Unix domain socket file
extension on which the server
is listening for connections.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-U <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--username=<TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
></DT
><DD
><P
> User name to connect as.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-w</TT
><BR><TT
CLASS="OPTION"
>--no-password</TT
></DT
><DD
><P
> Never issue a password prompt. If the server requires
password authentication and a password is not available by
other means such as a <TT
CLASS="FILENAME"
>.pgpass</TT
> 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.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-W</TT
><BR><TT
CLASS="OPTION"
>--password</TT
></DT
><DD
><P
> Force <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> to prompt for a
password before connecting to a database.
</P
><P
> This option is never essential, since
<SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> will automatically prompt
for a password if the server demands password authentication.
However, <SPAN
CLASS="APPLICATION"
>dropdb</SPAN
> will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing <TT
CLASS="OPTION"
>-W</TT
> to avoid the extra
connection attempt.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--maintenance-db=<TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
></DT
><DD
><P
> Specifies the name of the database to connect to in order to drop the
target database. If not specified, the <TT
CLASS="LITERAL"
>postgres</TT
>
database will be used; if that does not exist (or is the database
being dropped), <TT
CLASS="LITERAL"
>template1</TT
> will be used.
</P
></DD
></DL
></DIV
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81088"
></A
><H2
>Environment</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="ENVAR"
>PGHOST</TT
><BR><TT
CLASS="ENVAR"
>PGPORT</TT
><BR><TT
CLASS="ENVAR"
>PGUSER</TT
></DT
><DD
><P
> Default connection parameters
</P
></DD
></DL
></DIV
><P
> This utility, like most other <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> utilities,
also uses the environment variables supported by <SPAN
CLASS="APPLICATION"
>libpq</SPAN
>
(see <A
HREF="libpq-envars.html"
>Section 31.14</A
>).
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81104"
></A
><H2
>Diagnostics</H2
><P
> In case of difficulty, see <A
HREF="sql-dropdatabase.html"
>DROP DATABASE</A
>
and <A
HREF="app-psql.html"
><SPAN
CLASS="APPLICATION"
>psql</SPAN
></A
> for
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 <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> front-end
library will apply.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81110"
></A
><H2
>Examples</H2
><P
> To destroy the database <TT
CLASS="LITERAL"
>demo</TT
> on the default
database server:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>dropdb demo</KBD
></PRE
><P>
</P
><P
> To destroy the database <TT
CLASS="LITERAL"
>demo</TT
> using the
server on host <TT
CLASS="LITERAL"
>eden</TT
>, port 5000, with verification and a peek
at the underlying command:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>dropdb -p 5000 -h eden -i -e demo</KBD
>
<SAMP
CLASS="COMPUTEROUTPUT"
>Database "demo" will be permanently deleted.
Are you sure? (y/n) </SAMP
><KBD
CLASS="USERINPUT"
>y</KBD
>
<SAMP
CLASS="COMPUTEROUTPUT"
>DROP DATABASE demo;</SAMP
></PRE
><P></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81126"
></A
><H2
>See Also</H2
><A
HREF="app-createdb.html"
><SPAN
CLASS="APPLICATION"
>createdb</SPAN
></A
>, <A
HREF="sql-dropdatabase.html"
>DROP DATABASE</A
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