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Update for new pg_dump with blobs etc
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‎doc/src/sgml/ref/pg_dump.sgml

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@@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.23 2000/11/13 23:57:20 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.24 2000/11/21 15:39:09 pjw Exp $
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Postgres documentation
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-->
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@@ -15,26 +15,29 @@ Postgres documentation
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<application>pg_dump</application>
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</refname>
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<refpurpose>
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Extract a <productname>Postgres</productname> database into a script file
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Extract a <productname>Postgres</productname> database into a script file or other archive file
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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<date>2000-11-22</date>
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</refsynopsisdivinfo>
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<synopsis>
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pg_dump [ <replaceable class="parameter">dbname</replaceable> ]
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pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
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[ -p <replaceable class="parameter">port</replaceable> ]
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[ -t <replaceable class="parameter">table</replaceable> ]
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[ -a ] [ -c ] [ -d ] [ -D ] [ -i ] [ -n ] [ -N ]
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[ -o ] [ -s ] [ -u ] [ -v ] [ -x ]
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[ -t <replaceable class="parameter">table</replaceable> ]
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[ -a ] [ -b ] [ -c ] [-C] [ -d ] [ -D ]
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[-f <REPLACEABLE CLASS="PARAMETER">file</REPLACEABLE>]
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[-F <REPLACEABLE CLASS="PARAMETER">format</REPLACEABLE>]
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[ -i ] [ -n ] [ -N ] [ -o ] [ -O ] [-R]
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[ -s ] [ -S ] [ -u ] [ -v ] [ -x ] [ -Z 0..9 ]
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[ <replaceable class="parameter">dbname</replaceable> ]
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</synopsis>
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<refsect2 id="R2-APP-PG-DUMP-1">
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<refsect2info>
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<date>1998-11-05</date>
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<date>2000-11-22</date>
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</refsect2info>
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<title>
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Inputs
@@ -66,20 +69,39 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-c</term>
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<listitem>
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<para>
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Clean (drop) schema prior to create.
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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>-b</term>
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<listitem>
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<para>
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Dump BLOB data.
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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>-c</term>
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<listitem>
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<para>
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Clean (drop) schema prior to create.
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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>-C</term>
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<listitem>
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<para>
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For plain text (script) output, include SQL to create the database itself.
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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>-d</term>
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<listitem>
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<para>
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Dump data as proper insert strings.
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Dump data as proper insert strings. This is not recommended for large databases
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for performance reasons.
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</para>
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</listitem>
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</varlistentry>
@@ -88,10 +110,68 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
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<term>-D</term>
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<listitem>
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<para>
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Dump data as inserts with attribute names
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Dump data as inserts with attribute names. This is not recommended for large databases
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for performance reasons.
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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>-f <replaceable class="parameter">file</replaceable></term>
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<listitem>
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<para>
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Send output to the specified file.
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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>-F <replaceable class="parameter">format</replaceable></term>
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<listitem>
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<para>
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Format can be one of the following:
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</para>
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135+
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<variablelist>
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<varlistentry>
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<term>p</term>
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<listitem>
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<para>
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output a plain text SQL script file (default)
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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>t</term>
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<listitem>
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<para>
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output a TAR archive suitable for input into
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<APPLICATION>pg_restore</APPLICATION>. Using this archive format
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allows reordering and/or exclusion of schema elements
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at the time the database is restored. It is also possible to limit
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which data is reloaded at restore time.
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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>c</term>
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<listitem>
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<para>
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output a custom archive suitable for input into
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<APPLICATION>pg_restore</APPLICATION>. This is the most flexible
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format in that it allows reordering of data load as well
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as schema elements. This format is also compressed by default.
167+
</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-i</term>
@@ -132,15 +212,37 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
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</listitem>
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</varlistentry>
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135-
<varlistentry>
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<term>-o</term>
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<listitem>
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<para>
139-
Dump object identifiers (<acronym>OID</acronym>s) for every table.
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</para>
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</listitem>
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</varlistentry>
143-
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<varlistentry>
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<term>-o</term>
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<listitem>
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<para>
219+
Dump object identifiers (<acronym>OID</acronym>s) for every table.
220+
</para>
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</listitem>
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</varlistentry>
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224+
<varlistentry>
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<term>-O</term>
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<listitem>
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<para>
228+
In plain text output mode, don't set object ownership to match the
229+
original database. Typically, <APPLICATION>pg_dump</APPLICATION>
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issues <PROGRAMLISTING>\connect</PROGRAMLISTING> statments to set
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ownership of schema elements.
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</para>
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</listitem>
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</varlistentry>
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236+
<varlistentry>
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<term>-R</term>
238+
<listitem>
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<para>
240+
In plain text output mode, prohibit <APPLICATION>pg_dump</APPLICATION>
241+
from issuing any <PROGRAMLISTING>\connect</PROGRAMLISTING> statements.
242+
</para>
243+
</listitem>
244+
</varlistentry>
245+
144246
<varlistentry>
145247
<term>-s</term>
146248
<listitem>
@@ -150,15 +252,25 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
150252
</listitem>
151253
</varlistentry>
152254

153-
<varlistentry>
154-
<term>-t <replaceable class="parameter">table</replaceable></term>
155-
<listitem>
156-
<para>
157-
Dump data for <replaceable class="parameter">table</replaceable> only.
158-
</para>
159-
</listitem>
160-
</varlistentry>
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255+
<varlistentry>
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<term>-S <replaceable class="parameter">username</replaceable></term>
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<listitem>
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<para>
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Specify the superuser username to use when disabling triggers and/or
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setting ownership of schema elements.
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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>-t <replaceable class="parameter">table</replaceable></term>
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<listitem>
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<para>
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Dump data for <replaceable class="parameter">table</replaceable> only.
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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>-u</term>
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<listitem>
@@ -185,6 +297,17 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
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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>-Z <replaceable class="parameter">0..9</replaceable></term>
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<listitem>
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<para>
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Specify the compression level to use in archive formats that support
306+
compression (currently only the custom archive format supports compression).
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
190313
</para>
@@ -306,17 +429,26 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
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307430
<refsect1 id="R1-APP-PG-DUMP-1">
308431
<refsect1info>
309-
<date>1998-11-05</date>
432+
<date>2000-</date>
310433
</refsect1info>
311434
<title>
312435
Description
313436
</title>
314437
<para>
315438
<application>pg_dump</application> is a utility for dumping out a
316-
<productname>Postgres</productname> database into a script file
317-
containing query commands. The script
318-
files are in text format and can be used to reconstruct the database,
319-
even on other machines and other architectures.
439+
<productname>Postgres</productname> database into a script or archive
440+
file containing query commands. The script files are in text format
441+
and can be used to reconstruct the database, even on other machines
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and other architectures.
443+
</para>
444+
<para>
445+
The archive files, new with this v7.1, contain enough information for
446+
<APPLICATION>pg_restore</APPLICATION> to rebuild the database, but also
447+
allow pg_restore to be selective about what is restored, or even to
448+
reorder the items prior to being restored. The archive files should
449+
also be portable across architectures.
450+
</para>
451+
<para>
320452
<application>pg_dump</application>
321453
will produce the queries necessary to re-generate all
322454
user-defined types, functions, tables, indices, aggregates, and
@@ -330,14 +462,28 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
330462
is useful for dumping out the contents of a database to move from one
331463
<productname>Postgres</productname> installation to another. After running
332464
<application>pg_dump</application>,
333-
one should examine the output script file for any warnings, especially
465+
one should examine the output for any warnings, especially
334466
in light of the limitations listed below.
335467
</para>
468+
469+
<para>
470+
When used with one of the alternate file formats and combined with
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<APPLICATION>pg_restore</APPLICATION>, it provides a flexible archival
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and trasfer mechanism. <APPLICATION>pg_dump</APPLICATION> can be used
473+
to backup an entire database, then <APPLICATION>pg_restore</APPLICATION>
474+
can be used to examine the archive and/or select which parts of the
475+
database are to be restored.
476+
</para>
477+
478+
<para>
479+
See the <APPLICATION>pg_restore</APPLICATION> documentation for details.
480+
</para>
481+
336482
</refsect1>
337483

338484
<refsect1 id="R1-APP-PG-DUMP-2">
339485
<refsect1info>
340-
<date>1998-11-05</date>
486+
<date>2000-11-21</date>
341487
</refsect1info>
342488
<title>
343489
Notes
@@ -359,8 +505,9 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
359505

360506
<listitem>
361507
<para>
362-
<application>pg_dump</application> does not handle large objects.
363-
Large objects are ignored and must be dealt with manually.
508+
When dumping a single table or as plain text, <application>pg_dump</application>
509+
does not handle large objects. Large objects must be dumped in their
510+
entirity using one of the binary archive formats.
364511
</para>
365512
</listitem>
366513

@@ -379,7 +526,7 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
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380527
<refsect1 id="R1-APP-PG-DUMP-3">
381528
<refsect1info>
382-
<date>1998-11-05</date>
529+
<date>2000-11-21</date>
383530
</refsect1info>
384531
<title>
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Usage
@@ -399,6 +546,23 @@ $ pg_dump > db.out
399546
$ psql -e database < db.out
400547
</programlisting>
401548
</para>
549+
550+
<para>
551+
To dump a database called mydb that contains BLOBs to a TAR file:
552+
553+
<programlisting>
554+
$ pg_dump -Ft --blobs mydb > db.tar
555+
</programlisting>
556+
</para>
557+
558+
<para>
559+
To reload this database (with BLOBs) to an existing db called newdb:
560+
561+
<programlisting>
562+
$ pg_restore db.tar --db=newdb
563+
</programlisting>
564+
</para>
565+
402566
</refsect1>
403567
</refentry>
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