1999-12-04 05:53:22 +01:00
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<!--
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2010-09-20 22:08:53 +02:00
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doc/src/sgml/ref/dropdb.sgml
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2001-12-08 04:24:40 +01:00
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PostgreSQL documentation
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1999-12-04 05:53:22 +01:00
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-->
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2017-10-20 03:16:39 +02:00
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<refentry id="app-dropdb">
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2014-02-24 03:25:35 +01:00
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<indexterm zone="app-dropdb">
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<primary>dropdb</primary>
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</indexterm>
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1999-12-04 05:53:22 +01:00
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<refmeta>
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2010-04-03 09:23:02 +02:00
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<refentrytitle><application>dropdb</application></refentrytitle>
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2000-11-12 00:01:45 +01:00
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<manvolnum>1</manvolnum>
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1999-12-04 05:53:22 +01:00
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<refmiscinfo>Application</refmiscinfo>
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</refmeta>
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2000-11-12 00:01:45 +01:00
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1999-12-04 05:53:22 +01:00
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<refnamediv>
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2000-11-12 00:01:45 +01:00
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<refname>dropdb</refname>
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2001-09-03 14:57:50 +02:00
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<refpurpose>remove a <productname>PostgreSQL</productname> database</refpurpose>
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1999-12-04 05:53:22 +01:00
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</refnamediv>
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2000-11-12 00:01:45 +01:00
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1999-12-04 05:53:22 +01:00
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<refsynopsisdiv>
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2000-11-12 00:01:45 +01:00
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<cmdsynopsis>
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<command>dropdb</command>
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2010-02-19 04:50:03 +01:00
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<arg rep="repeat"><replaceable>connection-option</replaceable></arg>
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2003-03-24 15:32:51 +01:00
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<arg rep="repeat"><replaceable>option</replaceable></arg>
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2000-11-12 00:01:45 +01:00
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<arg choice="plain"><replaceable>dbname</replaceable></arg>
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</cmdsynopsis>
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2002-07-28 17:22:21 +02:00
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</refsynopsisdiv>
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1999-12-04 05:53:22 +01:00
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2002-07-28 17:22:21 +02:00
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<refsect1>
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<title>Description</title>
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<para>
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<application>dropdb</application> destroys an existing
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<productname>PostgreSQL</productname> database.
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The user who executes this command must be a database
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superuser or the owner of the database.
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</para>
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<para>
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2003-03-18 23:19:47 +01:00
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<application>dropdb</application> is a wrapper around the
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2017-11-23 15:39:47 +01:00
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<acronym>SQL</acronym> command <xref linkend="sql-dropdatabase"/>.
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2003-09-12 02:12:47 +02:00
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There is no effective difference between dropping databases via
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this utility and via other methods for accessing the server.
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2002-07-28 17:22:21 +02:00
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</para>
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2003-09-12 02:12:47 +02:00
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2002-07-28 17:22:21 +02:00
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</refsect1>
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<refsect1>
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2002-10-12 01:03:48 +02:00
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<title>Options</title>
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<para>
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2017-10-09 03:44:17 +02:00
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<application>dropdb</application> accepts the following command-line arguments:
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1999-12-04 05:53:22 +01:00
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<variablelist>
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<varlistentry>
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2002-10-12 01:03:48 +02:00
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<term><replaceable class="parameter">dbname</replaceable></term>
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1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
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2007-02-22 00:21:12 +01:00
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Specifies the name of the database to be removed.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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2017-10-09 03:44:17 +02:00
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<term><option>-e</option></term>
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<term><option>--echo</option></term>
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1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
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2003-03-24 15:32:51 +01:00
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Echo the commands that <application>dropdb</application> generates
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2007-02-22 00:21:12 +01:00
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and sends to the server.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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2020-06-07 14:07:33 +02:00
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<term><option>-f</option></term>
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<term><option>--force</option></term>
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1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
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2020-06-07 14:07:33 +02:00
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Attempt to terminate all existing connections to the target database
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before dropping it. See <xref linkend="sql-dropdatabase"/> for more
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information on this option.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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2010-02-19 15:36:45 +01:00
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2019-11-18 05:58:32 +01:00
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<varlistentry>
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2020-06-07 14:07:33 +02:00
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<term><option>-i</option></term>
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<term><option>--interactive</option></term>
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2019-11-18 05:58:32 +01:00
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<listitem>
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<para>
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2020-06-07 14:07:33 +02:00
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Issues a verification prompt before doing anything destructive.
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2019-11-18 05:58:32 +01:00
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</para>
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</listitem>
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</varlistentry>
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2010-02-19 15:36:45 +01:00
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<varlistentry>
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2017-10-09 03:44:17 +02:00
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<term><option>-V</option></term>
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<term><option>--version</option></term>
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2010-02-19 15:36:45 +01:00
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<listitem>
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<para>
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Print the <application>dropdb</application> version and exit.
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</para>
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</listitem>
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</varlistentry>
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2012-06-18 01:44:00 +02:00
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<varlistentry>
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2017-10-09 03:44:17 +02:00
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<term><option>--if-exists</option></term>
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2012-06-18 01:44:00 +02:00
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<listitem>
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<para>
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Do not throw an error if the database does not exist. A notice is issued
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in this case.
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</para>
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</listitem>
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</varlistentry>
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2010-02-19 15:36:45 +01:00
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<varlistentry>
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2017-10-09 03:44:17 +02:00
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<term><option>-?</option></term>
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<term><option>--help</option></term>
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2010-02-19 15:36:45 +01:00
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<listitem>
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<para>
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Show help about <application>dropdb</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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2002-10-12 01:03:48 +02:00
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</variablelist>
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2010-02-19 15:36:45 +01:00
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2002-10-12 01:03:48 +02:00
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</para>
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1999-12-04 05:53:22 +01:00
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2002-10-12 01:03:48 +02:00
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<para>
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2003-09-12 02:12:47 +02:00
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<application>dropdb</application> also accepts the following
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2002-10-12 01:03:48 +02:00
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command-line arguments for connection parameters:
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<variablelist>
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1999-12-04 05:53:22 +01:00
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
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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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1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
|
2010-11-23 21:27:50 +01:00
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Specifies the host name of the machine on which the
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2007-02-22 00:21:12 +01:00
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server
|
2010-11-23 21:27:50 +01:00
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is running. If the value begins with a slash, it is used
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2007-02-22 00:21:12 +01:00
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as the directory for the Unix domain socket.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
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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>
|
1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
|
2010-11-23 21:27:50 +01:00
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Specifies the TCP port or local Unix domain socket file
|
2007-02-22 00:21:12 +01:00
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extension on which the server
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is listening for connections.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
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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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1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
|
2007-12-11 20:57:32 +01:00
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User name to connect as.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
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|
2009-02-26 17:02:39 +01:00
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
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<term><option>-w</option></term>
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<term><option>--no-password</option></term>
|
2009-02-26 17:02:39 +01:00
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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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|
1999-12-04 05:53:22 +01:00
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
|
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<term><option>-W</option></term>
|
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<term><option>--password</option></term>
|
1999-12-04 05:53:22 +01:00
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<listitem>
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<para>
|
2007-12-11 20:57:32 +01:00
|
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Force <application>dropdb</application> to prompt for a
|
2010-11-23 21:27:50 +01:00
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password before connecting to a database.
|
2007-12-11 20:57:32 +01:00
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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>dropdb</application> will automatically prompt
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for a password if the server demands password authentication.
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However, <application>dropdb</application> will waste a
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connection attempt finding out that the server wants a password.
|
2017-10-09 03:44:17 +02:00
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In some cases it is worth typing <option>-W</option> to avoid the extra
|
2007-12-11 20:57:32 +01:00
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connection attempt.
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1999-12-04 05:53:22 +01:00
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</para>
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</listitem>
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</varlistentry>
|
2011-12-06 14:48:15 +01:00
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<varlistentry>
|
2017-10-09 03:44:17 +02:00
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<term><option>--maintenance-db=<replaceable class="parameter">dbname</replaceable></option></term>
|
2011-12-06 14:48:15 +01:00
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<listitem>
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<para>
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Specifies the name of the database to connect to in order to drop the
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target database. If not specified, the <literal>postgres</literal>
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database will be used; if that does not exist (or is the database
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being dropped), <literal>template1</literal> will be used.
|
Fix connection string handling in src/bin/scripts/ programs.
When told to process all databases, clusterdb, reindexdb, and vacuumdb
would reconnect by replacing their --maintenance-db parameter with the
name of the target database. If that parameter is a connstring (which
has been allowed for a long time, though we failed to document that
before this patch), we'd lose any other options it might specify, for
example SSL or GSS parameters, possibly resulting in failure to connect.
Thus, this is the same bug as commit a45bc8a4f fixed in pg_dump and
pg_restore. We can fix it in the same way, by using libpq's rules for
handling multiple "dbname" parameters to add the target database name
separately. I chose to apply the same refactoring approach as in that
patch, with a struct to handle the command line parameters that need to
be passed through to connectDatabase. (Maybe someday we can unify the
very similar functions here and in pg_dump/pg_restore.)
Per Peter Eisentraut's comments on bug #16604. Back-patch to all
supported branches.
Discussion: https://postgr.es/m/16604-933f4b8791227b15@postgresql.org
2020-10-20 01:03:46 +02:00
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This can be a <link linkend="libpq-connstring">connection
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|
|
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string</link>. If so, connection string parameters will override any
|
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conflicting command line options.
|
2011-12-06 14:48:15 +01:00
|
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</para>
|
|
|
|
</listitem>
|
|
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|
</varlistentry>
|
2002-10-12 01:03:48 +02:00
|
|
|
</variablelist>
|
|
|
|
</para>
|
2002-07-28 17:22:21 +02:00
|
|
|
</refsect1>
|
1999-12-04 05:53:22 +01:00
|
|
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|
|
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|
|
2002-07-28 17:22:21 +02:00
|
|
|
<refsect1>
|
|
|
|
<title>Environment</title>
|
1999-12-04 05:53:22 +01:00
|
|
|
|
2002-07-28 17:22:21 +02:00
|
|
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<variablelist>
|
|
|
|
<varlistentry>
|
|
|
|
<term><envar>PGHOST</envar></term>
|
|
|
|
<term><envar>PGPORT</envar></term>
|
|
|
|
<term><envar>PGUSER</envar></term>
|
|
|
|
|
|
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|
<listitem>
|
|
|
|
<para>
|
|
|
|
Default connection parameters
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
Unified logging system for command-line programs
This unifies the various ad hoc logging (message printing, error
printing) systems used throughout the command-line programs.
Features:
- Program name is automatically prefixed.
- Message string does not end with newline. This removes a common
source of inconsistencies and omissions.
- Additionally, a final newline is automatically stripped, simplifying
use of PQerrorMessage() etc., another common source of mistakes.
- I converted error message strings to use %m where possible.
- As a result of the above several points, more translatable message
strings can be shared between different components and between
frontends and backend, without gratuitous punctuation or whitespace
differences.
- There is support for setting a "log level". This is not meant to be
user-facing, but can be used internally to implement debug or
verbose modes.
- Lazy argument evaluation, so no significant overhead if logging at
some level is disabled.
- Some color in the messages, similar to gcc and clang. Set
PG_COLOR=auto to try it out. Some colors are predefined, but can be
customized by setting PG_COLORS.
- Common files (common/, fe_utils/, etc.) can handle logging much more
simply by just using one API without worrying too much about the
context of the calling program, requiring callbacks, or having to
pass "progname" around everywhere.
- Some programs called setvbuf() to make sure that stderr is
unbuffered, even on Windows. But not all programs did that. This
is now done centrally.
Soft goals:
- Reduces vertical space use and visual complexity of error reporting
in the source code.
- Encourages more deliberate classification of messages. For example,
in some cases it wasn't clear without analyzing the surrounding code
whether a message was meant as an error or just an info.
- Concepts and terms are vaguely aligned with popular logging
frameworks such as log4j and Python logging.
This is all just about printing stuff out. Nothing affects program
flow (e.g., fatal exits). The uses are just too varied to do that.
Some existing code had wrappers that do some kind of print-and-exit,
and I adapted those.
I tried to keep the output mostly the same, but there is a lot of
historical baggage to unwind and special cases to consider, and I
might not always have succeeded. One significant change is that
pg_rewind used to write all error messages to stdout. That is now
changed to stderr.
Reviewed-by: Donald Dong <xdong@csumb.edu>
Reviewed-by: Arthur Zakirov <a.zakirov@postgrespro.ru>
Discussion: https://www.postgresql.org/message-id/flat/6a609b43-4f57-7348-6480-bd022f924310@2ndquadrant.com
2019-04-01 14:24:37 +02:00
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
<term><envar>PG_COLOR</envar></term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
2020-03-09 02:53:22 +01:00
|
|
|
Specifies whether to use color in diagnostic messages. Possible values
|
|
|
|
are <literal>always</literal>, <literal>auto</literal> and
|
Unified logging system for command-line programs
This unifies the various ad hoc logging (message printing, error
printing) systems used throughout the command-line programs.
Features:
- Program name is automatically prefixed.
- Message string does not end with newline. This removes a common
source of inconsistencies and omissions.
- Additionally, a final newline is automatically stripped, simplifying
use of PQerrorMessage() etc., another common source of mistakes.
- I converted error message strings to use %m where possible.
- As a result of the above several points, more translatable message
strings can be shared between different components and between
frontends and backend, without gratuitous punctuation or whitespace
differences.
- There is support for setting a "log level". This is not meant to be
user-facing, but can be used internally to implement debug or
verbose modes.
- Lazy argument evaluation, so no significant overhead if logging at
some level is disabled.
- Some color in the messages, similar to gcc and clang. Set
PG_COLOR=auto to try it out. Some colors are predefined, but can be
customized by setting PG_COLORS.
- Common files (common/, fe_utils/, etc.) can handle logging much more
simply by just using one API without worrying too much about the
context of the calling program, requiring callbacks, or having to
pass "progname" around everywhere.
- Some programs called setvbuf() to make sure that stderr is
unbuffered, even on Windows. But not all programs did that. This
is now done centrally.
Soft goals:
- Reduces vertical space use and visual complexity of error reporting
in the source code.
- Encourages more deliberate classification of messages. For example,
in some cases it wasn't clear without analyzing the surrounding code
whether a message was meant as an error or just an info.
- Concepts and terms are vaguely aligned with popular logging
frameworks such as log4j and Python logging.
This is all just about printing stuff out. Nothing affects program
flow (e.g., fatal exits). The uses are just too varied to do that.
Some existing code had wrappers that do some kind of print-and-exit,
and I adapted those.
I tried to keep the output mostly the same, but there is a lot of
historical baggage to unwind and special cases to consider, and I
might not always have succeeded. One significant change is that
pg_rewind used to write all error messages to stdout. That is now
changed to stderr.
Reviewed-by: Donald Dong <xdong@csumb.edu>
Reviewed-by: Arthur Zakirov <a.zakirov@postgrespro.ru>
Discussion: https://www.postgresql.org/message-id/flat/6a609b43-4f57-7348-6480-bd022f924310@2ndquadrant.com
2019-04-01 14:24:37 +02:00
|
|
|
<literal>never</literal>.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
2002-07-28 17:22:21 +02:00
|
|
|
</variablelist>
|
2007-02-20 19:10:59 +01:00
|
|
|
|
|
|
|
<para>
|
2017-10-09 03:44:17 +02:00
|
|
|
This utility, like most other <productname>PostgreSQL</productname> utilities,
|
|
|
|
also uses the environment variables supported by <application>libpq</application>
|
2017-11-23 15:39:47 +01:00
|
|
|
(see <xref linkend="libpq-envars"/>).
|
2007-02-20 19:10:59 +01:00
|
|
|
</para>
|
|
|
|
|
1999-12-04 05:53:22 +01:00
|
|
|
</refsect1>
|
|
|
|
|
2002-07-28 17:22:21 +02:00
|
|
|
|
2003-09-13 01:04:46 +02:00
|
|
|
<refsect1>
|
|
|
|
<title>Diagnostics</title>
|
|
|
|
|
|
|
|
<para>
|
2017-11-23 15:39:47 +01:00
|
|
|
In case of difficulty, see <xref linkend="sql-dropdatabase"/>
|
|
|
|
and <xref linkend="app-psql"/> for
|
2003-09-13 01:04:46 +02:00
|
|
|
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>
|
2002-07-28 17:22:21 +02:00
|
|
|
<title>Examples</title>
|
2000-11-12 00:01:45 +01:00
|
|
|
|
|
|
|
<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
|
2002-01-20 23:19:57 +01:00
|
|
|
server on host <literal>eden</literal>, port 5000, with verification and a peek
|
2003-03-24 15:32:51 +01:00
|
|
|
at the underlying command:
|
2000-11-12 00:01:45 +01:00
|
|
|
<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>
|
2007-06-21 12:43:09 +02:00
|
|
|
<computeroutput>DROP DATABASE demo;</computeroutput>
|
2011-08-07 09:49:45 +02:00
|
|
|
</screen></para>
|
1999-12-04 05:53:22 +01:00
|
|
|
</refsect1>
|
2002-07-28 17:22:21 +02:00
|
|
|
|
|
|
|
|
|
|
|
<refsect1>
|
|
|
|
<title>See Also</title>
|
|
|
|
|
|
|
|
<simplelist type="inline">
|
2017-11-23 15:39:47 +01:00
|
|
|
<member><xref linkend="app-createdb"/></member>
|
|
|
|
<member><xref linkend="sql-dropdatabase"/></member>
|
2002-07-28 17:22:21 +02:00
|
|
|
</simplelist>
|
|
|
|
</refsect1>
|
|
|
|
|
1999-12-04 05:53:22 +01:00
|
|
|
</refentry>
|