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Make pg_restore usage examples more useful: illustrate restoring into

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both the same database name and a different one.
This commit is contained in:
Tom Lane 2006-11-26 18:11:11 +00:00
parent 50271fc9b3
commit 81b0b06462
1 changed files with 30 additions and 10 deletions
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40
doc/src/sgml/ref/pg_restore.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/pg_restore.sgml,v 1.63 2006/10/14 23:07:22 tgl Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/ref/pg_restore.sgml,v 1.64 2006/11/26 18:11:11 tgl Exp $ -->
<refentry id="APP-PGRESTORE"> <refentry id="APP-PGRESTORE">
<refmeta> <refmeta>
@ -580,34 +580,54 @@ CREATE DATABASE foo WITH TEMPLATE template0;
<title>Examples</title> <title>Examples</title>
<para> <para>
To dump a database called <literal>mydb</> to a <filename>tar</filename> Assume we have dumped a database called <literal>mydb</> into a
file: custom-format dump file:
<screen> <screen>
<prompt>$</prompt> <userinput>pg_dump -Ft mydb &gt; db.tar</userinput> <prompt>$</prompt> <userinput>pg_dump -Fc mydb &gt; db.dump</userinput>
</screen> </screen>
</para> </para>
<para> <para>
To reload this dump into an To drop the database and recreate it from the dump:
existing database called <literal>newdb</>:
<screen> <screen>
<prompt>$</prompt> <userinput>pg_restore -d newdb db.tar</userinput> <prompt>$</prompt> <userinput>dropdb mydb</userinput>
<prompt>$</prompt> <userinput>pg_restore -C -d postgres db.dump</userinput>
</screen> </screen>
The database named in the <option>-d</> switch can be any database existing
in the cluster; <application>pg_restore</> only uses it to issue the
<command>CREATE DATABASE</> command for <literal>mydb</>. With
<option>-C</>, data is always restored into the database name that appears
in the dump file.
</para>
<para>
To reload the dump into a new database called <literal>newdb</>:
<screen>
<prompt>$</prompt> <userinput>createdb -T template0 newdb</userinput>
<prompt>$</prompt> <userinput>pg_restore -d newdb db.dump</userinput>
</screen>
Notice we don't use <option>-C</>, and instead connect directly to the
database to be restored into. Also note that we clone the new database
from <literal>template0</> not <literal>template1</>, to ensure it is
initially empty.
</para> </para>
<para> <para>
To reorder database items, it is first necessary to dump the table of To reorder database items, it is first necessary to dump the table of
contents of the archive: contents of the archive:
<screen> <screen>
<prompt>$</prompt> <userinput>pg_restore -l archive.file &gt; archive.list</userinput> <prompt>$</prompt> <userinput>pg_restore -l db.dump &gt; db.list</userinput>
</screen> </screen>
The listing file consists of a header and one line for each item, e.g., The listing file consists of a header and one line for each item, e.g.,
<programlisting> <programlisting>
; ;
; Archive created at Fri Jul 28 22:28:36 2000 ; Archive created at Fri Jul 28 22:28:36 2000
; dbname: birds ; dbname: mydb
; TOC Entries: 74 ; TOC Entries: 74
; Compression: 0 ; Compression: 0
; Dump Version: 1.4-0 ; Dump Version: 1.4-0
@ -645,7 +665,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
could be used as input to <application>pg_restore</application> and would only restore could be used as input to <application>pg_restore</application> and would only restore
items 10 and 6, in that order: items 10 and 6, in that order:
<screen> <screen>
<prompt>$</prompt> <userinput>pg_restore -L archive.list archive.file</userinput> <prompt>$</prompt> <userinput>pg_restore -L db.list db.dump</userinput>
</screen> </screen>
</para> </para>