postgres

History

Peter Eisentraut d6b043eb63 Fix buffer clearing bug.		23 years ago
..
po	Translation updates	24 years ago
Makefile	Don't force rebuild of all of backend/parser when we only need	23 years ago
README	…
common.c	Allow fseeko in pg_dump only if fseeko() will work for all supported file	24 years ago
dumputils.c	Allow pg_dumpall to work with previous releases again. Don't pass the -c	24 years ago
dumputils.h	Allow pg_dumpall to work with previous releases again. Don't pass the -c	24 years ago
nls.mk	Reimplement pg_dumpall in C. Currently no change in functionality,	24 years ago
pg_backup.h	pgindent run.	24 years ago
pg_backup_archiver.c	Cleaner solution to the problem of loading pre-7.3 dumps containing	23 years ago
pg_backup_archiver.h	Changes of 6-Sep-02 broke pg_restore's ability to recognize tar-format	23 years ago
pg_backup_custom.c	Allow fseeko in pg_dump only if fseeko() will work for all supported file	24 years ago
pg_backup_db.c	Cleaner solution to the problem of loading pre-7.3 dumps containing	23 years ago
pg_backup_db.h	…
pg_backup_files.c	Allow fseeko in pg_dump only if fseeko() will work for all supported file	24 years ago
pg_backup_null.c	pgindent run.	24 years ago
pg_backup_tar.c	Changes of 6-Sep-02 broke pg_restore's ability to recognize tar-format	23 years ago
pg_backup_tar.h	backend where a statically sized buffer is written to. Most of these	24 years ago
pg_dump.c	Fix buffer clearing bug.	23 years ago
pg_dump.h	> Alvaro Herrera <alvherre@atentus.com> writes:	24 years ago
pg_dumpall.c	Fix bogus formatting of DROP DATABASE command, per Christopher Kings-Lynne.	23 years ago
pg_restore.c	Use our own version of getopt_long() if the OS doesn't have one.	23 years ago
sprompt.c	Add comment about sharing of sprompt.c file.	24 years ago

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 can not be used as input into pg_restore.

4. pg_dump now dumps the items in a modified OID order to try to improve relaibility of default restores.


To dump a database into the next custom format, type:

    pg_dump <db-name> -Fc > <backup-file>

or, 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 differnet orderL

       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


BLOBs
=====

To dump blobs you must use the custom archive format (-Fc) or TAR format (-Ft), and specify the 
--blobs qualifier to the pg_dump command.

To restore blobs you must use a direct database connection (--db=db-to-restore-to).

eg.

   pg_dump --blob -Fc db-to-backup -f backup.bck

   pg_restore backup.bck --db=db-to-restore-into


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. It 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