If anybody out there is comfortable with using make, has the PG sources on
their machine, and is interested in testing a new version of pg_dump,
please let me know.
Details of the revised pg_dump, and new pg_restore are at the end of this
message.
Thanks,
Philip Warner.
-------------
The basic idea is to use pg_dump to dump an *entire* database, and then use
pg_restore to choose what is restored.
The salient features are as follows:
- pg_dump still used to dump database; all output is via new interface
(virtually all of the pg_dump code is changed, but not the logic). The
changes are relatively minor, all the same.
- the '-c' option is not used in pg-dump: it now dumps the commands to
delete the schema, and it is up to the user of pg_restore to decide if they
are output.
- the default output file format is stll text, but a new custom format
with compressed sections (the data dumps) is available via the '-Fc' flag.
It is NOT a text file.
- pg_restore reads the backup file and, depending on the options chosen,
produces a script (to stdout) that can be sent to psql.
- by default pg_restore outputs the schema/data in the order it was sent
from pg_dump, but the --oid flag will send the output in order of
increasing OID, and the --rearrange flag will put all 'non-parental' (??)
items at the end, after the data. (eg. indexes, acls, triggers etc).
Needless to say that the best results com from using both of these options.
- If the -c (clear) option is chosen in pg_restore, it also dumps the
'drop' commands in reverse order at the start of the script. This *should*
make it more reliable than dumping them when the item is defined. It also
means that triggers can be dropped.
- The --toc option shows a summary of the restore operation that would be
performed if the --toc were not there.
Please send me an email if you are interested and have the time to test them.
Thanks,
Philip Warner.
----------------------------------------------------------------
Philip Warner | __---_____
Albatross Consulting Pty. Ltd. |----/ - \
(A.C.N. 008 659 498) | /(@) ______---_
Tel: (+61) 0500 83 82 81 | _________ \
Fax: (+61) 0500 83 82 82 | ___________ |
Http://www.rhyme.com.au | / \|
| --________--
PGP key available upon request, | /
and from pgp5.ai.mit.edu:11371 |/
