295 lines
8.3 KiB
Plaintext
295 lines
8.3 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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<indexterm zone="app-dropuser">
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<primary>dropuser</primary>
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</indexterm>
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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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<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</literal> 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</option></term>
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<term><option>--echo</option></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</option></term>
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<term><option>--interactive</option></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>-V</option></term>
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<term><option>--version</option></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>--if-exists</option></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>-?</option></term>
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<term><option>--help</option></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></option></term>
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<term><option>--host=<replaceable class="parameter">host</replaceable></option></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></option></term>
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<term><option>--port=<replaceable class="parameter">port</replaceable></option></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></option></term>
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<term><option>--username=<replaceable class="parameter">username</replaceable></option></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</option></term>
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<term><option>--no-password</option></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</option></term>
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<term><option>--password</option></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</option> 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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<varlistentry>
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<term><envar>PG_COLOR</envar></term>
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<listitem>
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<para>
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Specifies whether to use color in diagnostic messages. Possible values
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are <literal>always</literal>, <literal>auto</literal> and
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<literal>never</literal>.
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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</productname> utilities,
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also uses the environment variables supported by <application>libpq</application>
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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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