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Update for new pg_dump with blobs etc

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Philip Warner 2000-11-21 15:39:09 +00:00
parent 2536267404
commit aec962d864
1 changed files with 210 additions and 46 deletions
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256
doc/src/sgml/ref/pg_dump.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.23 2000/11/13 23:57:20 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.24 2000/11/21 15:39:09 pjw Exp $
Postgres documentation
-->
@ -15,26 +15,29 @@ Postgres documentation
<application>pg_dump</application>
</refname>
<refpurpose>
Extract a <productname>Postgres</productname> database into a script file
Extract a <productname>Postgres</productname> database into a script file or other archive file
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>1999-07-20</date>
<date>2000-11-22</date>
</refsynopsisdivinfo>
<synopsis>
pg_dump [ <replaceable class="parameter">dbname</replaceable> ]
pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
[ -p <replaceable class="parameter">port</replaceable> ]
[ -t <replaceable class="parameter">table</replaceable> ]
[ -a ] [ -c ] [ -d ] [ -D ] [ -i ] [ -n ] [ -N ]
[ -o ] [ -s ] [ -u ] [ -v ] [ -x ]
[ -t <replaceable class="parameter">table</replaceable> ]
[ -a ] [ -b ] [ -c ] [-C] [ -d ] [ -D ]
[-f <REPLACEABLE CLASS="PARAMETER">file</REPLACEABLE>]
[-F <REPLACEABLE CLASS="PARAMETER">format</REPLACEABLE>]
[ -i ] [ -n ] [ -N ] [ -o ] [ -O ] [-R]
[ -s ] [ -S ] [ -u ] [ -v ] [ -x ] [ -Z 0..9 ]
[ <replaceable class="parameter">dbname</replaceable> ]
</synopsis>
<refsect2 id="R2-APP-PG-DUMP-1">
<refsect2info>
<date>1998-11-05</date>
<date>2000-11-22</date>
</refsect2info>
<title>
Inputs
@ -66,20 +69,39 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
</listitem>
</varlistentry>
<varlistentry>
<term>-c</term>
<listitem>
<para>
Clean (drop) schema prior to create.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-b</term>
<listitem>
<para>
Dump BLOB data.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-c</term>
<listitem>
<para>
Clean (drop) schema prior to create.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-C</term>
<listitem>
<para>
For plain text (script) output, include SQL to create the database itself.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-d</term>
<listitem>
<para>
Dump data as proper insert strings.
Dump data as proper insert strings. This is not recommended for large databases
for performance reasons.
</para>
</listitem>
</varlistentry>
@ -88,10 +110,68 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
<term>-D</term>
<listitem>
<para>
Dump data as inserts with attribute names
Dump data as inserts with attribute names. This is not recommended for large databases
for performance reasons.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-f <replaceable class="parameter">file</replaceable></term>
<listitem>
<para>
Send output to the specified file.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-F <replaceable class="parameter">format</replaceable></term>
<listitem>
<para>
Format can be one of the following:
</para>
<variablelist>
<varlistentry>
<term>p</term>
<listitem>
<para>
output a plain text SQL script file (default)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>t</term>
<listitem>
<para>
output a TAR archive suitable for input into
<APPLICATION>pg_restore</APPLICATION>. Using this archive format
allows reordering and/or exclusion of schema elements
at the time the database is restored. It is also possible to limit
which data is reloaded at restore time.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>c</term>
<listitem>
<para>
output a custom archive suitable for input into
<APPLICATION>pg_restore</APPLICATION>. This is the most flexible
format in that it allows reordering of data load as well
as schema elements. This format is also compressed by default.
</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term>-i</term>
@ -132,15 +212,37 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
</listitem>
</varlistentry>
<varlistentry>
<term>-o</term>
<listitem>
<para>
Dump object identifiers (<acronym>OID</acronym>s) for every table.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-o</term>
<listitem>
<para>
Dump object identifiers (<acronym>OID</acronym>s) for every table.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-O</term>
<listitem>
<para>
In plain text output mode, don't set object ownership to match the
original database. Typically, <APPLICATION>pg_dump</APPLICATION>
issues <PROGRAMLISTING>\connect</PROGRAMLISTING> statments to set
ownership of schema elements.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-R</term>
<listitem>
<para>
In plain text output mode, prohibit <APPLICATION>pg_dump</APPLICATION>
from issuing any <PROGRAMLISTING>\connect</PROGRAMLISTING> statements.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-s</term>
<listitem>
@ -150,15 +252,25 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
</listitem>
</varlistentry>
<varlistentry>
<term>-t <replaceable class="parameter">table</replaceable></term>
<listitem>
<para>
Dump data for <replaceable class="parameter">table</replaceable> only.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-S <replaceable class="parameter">username</replaceable></term>
<listitem>
<para>
Specify the superuser username to use when disabling triggers and/or
setting ownership of schema elements.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-t <replaceable class="parameter">table</replaceable></term>
<listitem>
<para>
Dump data for <replaceable class="parameter">table</replaceable> only.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-u</term>
<listitem>
@ -185,6 +297,17 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ]
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-Z <replaceable class="parameter">0..9</replaceable></term>
<listitem>
<para>
Specify the compression level to use in archive formats that support
compression (currently only the custom archive format supports compression).
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
@ -306,17 +429,26 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
<refsect1 id="R1-APP-PG-DUMP-1">
<refsect1info>
<date>1998-11-05</date>
<date>2000-</date>
</refsect1info>
<title>
Description
</title>
<para>
<application>pg_dump</application> is a utility for dumping out a
<productname>Postgres</productname> database into a script file
containing query commands. The script
files are in text format and can be used to reconstruct the database,
even on other machines and other architectures.
<productname>Postgres</productname> database into a script or archive
file containing query commands. The script files are in text format
and can be used to reconstruct the database, even on other machines
and other architectures.
</para>
<para>
The archive files, new with this v7.1, contain enough information for
<APPLICATION>pg_restore</APPLICATION> to rebuild the database, but also
allow pg_restore to be selective about what is restored, or even to
reorder the items prior to being restored. The archive files should
also be portable across architectures.
</para>
<para>
<application>pg_dump</application>
will produce the queries necessary to re-generate all
user-defined types, functions, tables, indices, aggregates, and
@ -330,14 +462,28 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
is useful for dumping out the contents of a database to move from one
<productname>Postgres</productname> installation to another. After running
<application>pg_dump</application>,
one should examine the output script file for any warnings, especially
one should examine the output for any warnings, especially
in light of the limitations listed below.
</para>
<para>
When used with one of the alternate file formats and combined with
<APPLICATION>pg_restore</APPLICATION>, it provides a flexible archival
and trasfer mechanism. <APPLICATION>pg_dump</APPLICATION> can be used
to backup an entire database, then <APPLICATION>pg_restore</APPLICATION>
can be used to examine the archive and/or select which parts of the
database are to be restored.
</para>
<para>
See the <APPLICATION>pg_restore</APPLICATION> documentation for details.
</para>
</refsect1>
<refsect1 id="R1-APP-PG-DUMP-2">
<refsect1info>
<date>1998-11-05</date>
<date>2000-11-21</date>
</refsect1info>
<title>
Notes
@ -359,8 +505,9 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
<listitem>
<para>
<application>pg_dump</application> does not handle large objects.
Large objects are ignored and must be dealt with manually.
When dumping a single table or as plain text, <application>pg_dump</application>
does not handle large objects. Large objects must be dumped in their
entirity using one of the binary archive formats.
</para>
</listitem>
@ -379,7 +526,7 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
<refsect1 id="R1-APP-PG-DUMP-3">
<refsect1info>
<date>1998-11-05</date>
<date>2000-11-21</date>
</refsect1info>
<title>
Usage
@ -399,6 +546,23 @@ $ pg_dump > db.out
$ psql -e database < db.out
</programlisting>
</para>
<para>
To dump a database called mydb that contains BLOBs to a TAR file:
<programlisting>
$ pg_dump -Ft --blobs mydb > db.tar
</programlisting>
</para>
<para>
To reload this database (with BLOBs) to an existing db called newdb:
<programlisting>
$ pg_restore db.tar --db=newdb
</programlisting>
</para>
</refsect1>
</refentry>