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The default for the choice attribute of the <arg> element is "opt", which would normally put the argument inside brackets. But the DSSSL stylesheets contain a hack that treats <arg> directly inside <group> specially, so that <group><arg>-x</arg><arg>-y</arg></group> comes out as [ -x | -y ] rather than [ [-x] | [-y] ], which it would technically be. But when building man pages, this doesn't work, and so the command synopses on the man pages contain lots of extra brackets. By putting choice="opt" or choice="plain" explicitly on every <arg> and <group> element, we avoid any toolchain dependencies like that, and it also makes it clearer in the source code what is meant. In passing, make some small corrections in the documentation about which arguments are really optional or not.
284 lines
7.9 KiB
Plaintext
284 lines
7.9 KiB
Plaintext
<!--
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doc/src/sgml/ref/dropuser.sgml
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PostgreSQL documentation
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-->
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<refentry id="APP-DROPUSER">
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<refmeta>
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<refentrytitle><application>dropuser</application></refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo>Application</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>dropuser</refname>
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<refpurpose>remove a <productname>PostgreSQL</productname> user account</refpurpose>
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</refnamediv>
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<indexterm zone="app-dropuser">
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<primary>dropuser</primary>
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</indexterm>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>dropuser</command>
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<arg rep="repeat"><replaceable>connection-option</replaceable></arg>
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<arg rep="repeat"><replaceable>option</replaceable></arg>
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<arg choice="opt"><replaceable>username</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<application>dropuser</application> removes an existing
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<productname>PostgreSQL</productname> user.
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Only superusers and users with the <literal>CREATEROLE</> privilege can
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remove <productname>PostgreSQL</productname> users. (To remove a
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superuser, you must yourself be a superuser.)
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</para>
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<para>
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<application>dropuser</application> is a wrapper around the
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<acronym>SQL</acronym> command <xref linkend="SQL-DROPROLE">.
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There is no effective difference between dropping users via
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this utility and via other methods for accessing the server.
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</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>
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<application>dropuser</application> accepts the following command-line arguments:
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<variablelist>
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<varlistentry>
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<term><replaceable class="parameter">username</replaceable></term>
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<listitem>
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<para>
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Specifies the name of the <productname>PostgreSQL</productname> user to be removed.
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You will be prompted for a name if none is specified on the command
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line and the <option>-i</option>/<option>--interactive</option> option
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is used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-e</></term>
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<term><option>--echo</></term>
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<listitem>
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<para>
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Echo the commands that <application>dropuser</application> generates
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and sends to the server.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-i</></term>
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<term><option>--interactive</></term>
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<listitem>
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<para>
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Prompt for confirmation before actually removing the user, and prompt
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for the user name if none is specified on the command line.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--if-exists</></term>
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<listitem>
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<para>
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Do not throw an error if the user does not exist. A notice is
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issued in this case.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-V</></term>
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<term><option>--version</></term>
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<listitem>
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<para>
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Print the <application>dropuser</application> version and exit.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-?</></term>
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<term><option>--help</></term>
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<listitem>
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<para>
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Show help about <application>dropuser</application> command line
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arguments, and exit.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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<application>dropuser</application> also accepts the following
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command-line arguments for connection parameters:
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<variablelist>
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<varlistentry>
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<term><option>-h <replaceable class="parameter">host</replaceable></></term>
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<term><option>--host=<replaceable class="parameter">host</replaceable></></term>
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<listitem>
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<para>
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Specifies the host name of the machine on which the
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server
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is running. If the value begins with a slash, it is used
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as the directory for the Unix domain socket.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-p <replaceable class="parameter">port</replaceable></></term>
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<term><option>--port=<replaceable class="parameter">port</replaceable></></term>
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<listitem>
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<para>
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Specifies the TCP port or local Unix domain socket file
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extension on which the server
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is listening for connections.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-U <replaceable class="parameter">username</replaceable></></term>
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<term><option>--username=<replaceable class="parameter">username</replaceable></></term>
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<listitem>
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<para>
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User name to connect as (not the user name to drop).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-w</></term>
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<term><option>--no-password</></term>
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<listitem>
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<para>
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Never issue a password prompt. If the server requires
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password authentication and a password is not available by
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other means such as a <filename>.pgpass</filename> file, the
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connection attempt will fail. This option can be useful in
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batch jobs and scripts where no user is present to enter a
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password.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-W</></term>
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<term><option>--password</></term>
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<listitem>
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<para>
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Force <application>dropuser</application> to prompt for a
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password before connecting to a database.
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</para>
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<para>
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This option is never essential, since
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<application>dropuser</application> will automatically prompt
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for a password if the server demands password authentication.
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However, <application>dropuser</application> will waste a
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connection attempt finding out that the server wants a password.
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In some cases it is worth typing <option>-W</> to avoid the extra
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connection attempt.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1>
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<title>Environment</title>
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<variablelist>
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<varlistentry>
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<term><envar>PGHOST</envar></term>
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<term><envar>PGPORT</envar></term>
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<term><envar>PGUSER</envar></term>
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<listitem>
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<para>
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Default connection parameters
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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This utility, like most other <productname>PostgreSQL</> utilities,
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also uses the environment variables supported by <application>libpq</>
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(see <xref linkend="libpq-envars">).
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</para>
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</refsect1>
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<refsect1>
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<title>Diagnostics</title>
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<para>
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In case of difficulty, see <xref linkend="SQL-DROPROLE">
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and <xref linkend="APP-PSQL"> for
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discussions of potential problems and error messages.
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The database server must be running at the
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targeted host. Also, any default connection settings and environment
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variables used by the <application>libpq</application> front-end
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library will apply.
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</para>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>
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To remove user <literal>joe</literal> from the default database
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server:
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<screen>
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<prompt>$ </prompt><userinput>dropuser joe</userinput>
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</screen>
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</para>
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<para>
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To remove user <literal>joe</literal> using the server on host
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<literal>eden</literal>, port 5000, with verification and a peek at the underlying
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command:
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<screen>
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<prompt>$ </prompt><userinput>dropuser -p 5000 -h eden -i -e joe</userinput>
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<computeroutput>Role "joe" will be permanently removed.
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Are you sure? (y/n) </computeroutput><userinput>y</userinput>
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<computeroutput>DROP ROLE joe;</computeroutput>
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</screen></para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="app-createuser"></member>
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<member><xref linkend="sql-droprole"></member>
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</simplelist>
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</refsect1>
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</refentry>
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