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Get rid of pg_dump's README

Browse Source 
It was largely full of outdated and incorrect information.  Move the few
notes which were still relevant into header comments of pg_backup_tar.c
and pg_dumpall.c.

Josh Kupershmidt
This commit is contained in:
Peter Eisentraut 2013-01-16 23:49:54 -05:00
parent 7fcbf6a405
commit 36bdfa52a0
3 changed files with 6 additions and 79 deletions
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78
src/bin/pg_dump/README
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src/bin/pg_dump/README
Notes on pg_dump
================
1. pg_dump, by default, still outputs text files.
2. pg_dumpall forces all pg_dump output to be text, since it also outputs text into the same output stream.
3. The plain text output format cannot be used as input into pg_restore.
To dump a database into the new custom format, type:
pg_dump <db-name> -Fc > <backup-file>
or, to dump in TAR format
pg_dump <db-name> -Ft > <backup-file>
To restore, try
To list contents:
pg_restore -l <backup-file> | less
or to list tables:
pg_restore <backup-file> --table | less
or to list in a different order
pg_restore <backup-file> -l --oid --rearrange | less
Once you are happy with the list, just remove the '-l', and an SQL script will be output.
You can also dump a listing:
pg_restore -l <backup-file> > toc.lis
or
pg_restore -l <backup-file> -f toc.lis
edit it, and rearrange the lines (or delete some):
vi toc.lis
then use it to restore selected items:
pg_restore <backup-file> --use=toc.lis -l | less
When you like the list, type
pg_restore backup.bck --use=toc.lis > script.sql
or, simply:
createdb newdbname
pg_restore backup.bck --use=toc.lis | psql newdbname
TAR
===
The TAR archive that pg_dump creates currently has a blank username & group for the files,
but should be otherwise valid. It also includes a 'restore.sql' script which is there for
the benefit of humans. The script is never used by pg_restore.
Note: the TAR format archive can only be used as input into pg_restore if it is in TAR form.
(ie. you should not extract the files then expect pg_restore to work).
You can extract, edit, and tar the files again, and it should work, but the 'toc'
file should go at the start, the data files be in the order they are used, and
the BLOB files at the end.
Philip Warner, 16-Jul-2000
pjw@rhyme.com.au

5
src/bin/pg_dump/pg_backup_tar.c
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* This file is copied from the 'files' format file, but dumps data into
* one temp file then sends it to the output TAR archive.
*
* The tar format also includes a 'restore.sql' script which is there for
* the benefit of humans. This script is never used by pg_restore.
*
* NOTE: If you untar the created 'tar' file, the resulting files are
* compatible with the 'directory' format. Please keep the two formats in
* sync.
*
* See the headers to pg_backup_files & pg_restore for more details.
* See the headers to pg_backup_directory & pg_restore for more details.
*
* Copyright (c) 2000, Philip Warner
* Rights are granted to use this software in any way so long

2
src/bin/pg_dump/pg_dumpall.c
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@ -5,6 +5,8 @@
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* pg_dumpall forces all pg_dump output to be text, since it also outputs
* text into the same output stream.
*
* src/bin/pg_dump/pg_dumpall.c
*