diff options
Diffstat (limited to '')
| -rw-r--r-- | doc/src/sgml/ref/dropdb.sgml | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/dropdb.sgml b/doc/src/sgml/ref/dropdb.sgml new file mode 100644 index 0000000..d36aed3 --- /dev/null +++ b/doc/src/sgml/ref/dropdb.sgml @@ -0,0 +1,317 @@ +<!-- +doc/src/sgml/ref/dropdb.sgml +PostgreSQL documentation +--> + +<refentry id="app-dropdb"> + <indexterm zone="app-dropdb"> + <primary>dropdb</primary> + </indexterm> + + <refmeta> + <refentrytitle><application>dropdb</application></refentrytitle> + <manvolnum>1</manvolnum> + <refmiscinfo>Application</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>dropdb</refname> + <refpurpose>remove a <productname>PostgreSQL</productname> database</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>dropdb</command> + <arg rep="repeat"><replaceable>connection-option</replaceable></arg> + <arg rep="repeat"><replaceable>option</replaceable></arg> + <arg choice="plain"><replaceable>dbname</replaceable></arg> + </cmdsynopsis> + </refsynopsisdiv> + + + <refsect1> + <title>Description</title> + + <para> + <application>dropdb</application> destroys an existing + <productname>PostgreSQL</productname> database. + The user who executes this command must be a database + superuser or the owner of the database. + </para> + + <para> + <application>dropdb</application> is a wrapper around the + <acronym>SQL</acronym> command <link linkend="sql-dropdatabase"><command>DROP DATABASE</command></link>. + There is no effective difference between dropping databases via + this utility and via other methods for accessing the server. + </para> + + </refsect1> + + + <refsect1> + <title>Options</title> + + <para> + <application>dropdb</application> accepts the following command-line arguments: + + <variablelist> + <varlistentry> + <term><replaceable class="parameter">dbname</replaceable></term> + <listitem> + <para> + Specifies the name of the database to be removed. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-e</option></term> + <term><option>--echo</option></term> + <listitem> + <para> + Echo the commands that <application>dropdb</application> generates + and sends to the server. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-f</option></term> + <term><option>--force</option></term> + <listitem> + <para> + Attempt to terminate all existing connections to the target database + before dropping it. See <xref linkend="sql-dropdatabase"/> for more + information on this option. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-i</option></term> + <term><option>--interactive</option></term> + <listitem> + <para> + Issues a verification prompt before doing anything destructive. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-V</option></term> + <term><option>--version</option></term> + <listitem> + <para> + Print the <application>dropdb</application> version and exit. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--if-exists</option></term> + <listitem> + <para> + Do not throw an error if the database does not exist. A notice is issued + in this case. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-?</option></term> + <term><option>--help</option></term> + <listitem> + <para> + Show help about <application>dropdb</application> command line + arguments, and exit. + </para> + </listitem> + </varlistentry> + + </variablelist> + + </para> + + <para> + <application>dropdb</application> also accepts the following + command-line arguments for connection parameters: + + <variablelist> + <varlistentry> + <term><option>-h <replaceable class="parameter">host</replaceable></option></term> + <term><option>--host=<replaceable class="parameter">host</replaceable></option></term> + <listitem> + <para> + 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. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-p <replaceable class="parameter">port</replaceable></option></term> + <term><option>--port=<replaceable class="parameter">port</replaceable></option></term> + <listitem> + <para> + Specifies the TCP port or local Unix domain socket file + extension on which the server + is listening for connections. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-U <replaceable class="parameter">username</replaceable></option></term> + <term><option>--username=<replaceable class="parameter">username</replaceable></option></term> + <listitem> + <para> + User name to connect as. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-w</option></term> + <term><option>--no-password</option></term> + <listitem> + <para> + Never issue a password prompt. If the server requires + password authentication and a password is not available by + other means such as a <filename>.pgpass</filename> 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. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-W</option></term> + <term><option>--password</option></term> + <listitem> + <para> + Force <application>dropdb</application> to prompt for a + password before connecting to a database. + </para> + + <para> + This option is never essential, since + <application>dropdb</application> will automatically prompt + for a password if the server demands password authentication. + However, <application>dropdb</application> will waste a + connection attempt finding out that the server wants a password. + In some cases it is worth typing <option>-W</option> to avoid the extra + connection attempt. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--maintenance-db=<replaceable class="parameter">dbname</replaceable></option></term> + <listitem> + <para> + Specifies the name of the database to connect to in order to drop the + target database. If not specified, the <literal>postgres</literal> + database will be used; if that does not exist (or is the database + being dropped), <literal>template1</literal> will be used. + This can be a <link linkend="libpq-connstring">connection + string</link>. If so, connection string parameters will override any + conflicting command line options. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + </refsect1> + + + <refsect1> + <title>Environment</title> + + <variablelist> + <varlistentry> + <term><envar>PGHOST</envar></term> + <term><envar>PGPORT</envar></term> + <term><envar>PGUSER</envar></term> + + <listitem> + <para> + Default connection parameters + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><envar>PG_COLOR</envar></term> + <listitem> + <para> + Specifies whether to use color in diagnostic messages. Possible values + are <literal>always</literal>, <literal>auto</literal> and + <literal>never</literal>. + </para> + </listitem> + </varlistentry> + </variablelist> + + <para> + This utility, like most other <productname>PostgreSQL</productname> utilities, + also uses the environment variables supported by <application>libpq</application> + (see <xref linkend="libpq-envars"/>). + </para> + + </refsect1> + + + <refsect1> + <title>Diagnostics</title> + + <para> + In case of difficulty, see <xref linkend="sql-dropdatabase"/> + and <xref linkend="app-psql"/> 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 <application>libpq</application> front-end + library will apply. + </para> + + </refsect1> + + + <refsect1> + <title>Examples</title> + + <para> + To destroy the database <literal>demo</literal> on the default + database server: +<screen> +<prompt>$ </prompt><userinput>dropdb demo</userinput> +</screen> + </para> + + <para> + To destroy the database <literal>demo</literal> using the + server on host <literal>eden</literal>, port 5000, with verification and a peek + at the underlying command: +<screen> +<prompt>$ </prompt><userinput>dropdb -p 5000 -h eden -i -e demo</userinput> +<computeroutput>Database "demo" will be permanently deleted. +Are you sure? (y/n) </computeroutput><userinput>y</userinput> +<computeroutput>DROP DATABASE demo;</computeroutput> +</screen></para> + </refsect1> + + + <refsect1> + <title>See Also</title> + + <simplelist type="inline"> + <member><xref linkend="app-createdb"/></member> + <member><xref linkend="sql-dropdatabase"/></member> + </simplelist> + </refsect1> + +</refentry> |