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pg_dump: msg#00027

db.postgresql.german

Subject: pg_dump

Hallo,

ich habe das Problem, dass wir einen Dump einer sehr umfangreichen Datenbank anfertigen wollen. Nicht nur, dass pg_dump die Objekte nicht in der richtigen Reihenfolge erstellt, es werden auch ab und zu Sequenzen vergessen.

Bei kleineren Dumps korrigiert man das schnell noch per Hand, bei großen Dumps ist das allerdings fast unmöglich. Gibt es eine andere, zuverlässigere Methode?

Im 7.2'er Manual stand übrigens noch folgenden:

22.1.4. Caveats

pg_dump (and by implication pg_dumpall) has a few limitations which stem from the difficulty of reconstructing certain information from the system catalogs.

Specifically, the order in which pg_dump writes the objects is not very sophisticated. This can lead to problems for example when functions are used as column default values. The only answer is to manually reorder the dump. If you created circular dependencies in your schema then you will have more work to do.

For reasons of backward compatibility, pg_dump does not dump large objects by default. To dump large objects you must use either the custom or the TAR output format, and use the -b option in pg_dump. See the reference pages for details. The directory contrib/pg_dumplo of the PostgreSQL source tree also contains a program that can dump large objects.

Please familiarize yourself with the pg_dump reference page.


Dieser Abschnitt wurde im aktuellen Manual entfernt, die Probleme existieren jedoch auch bei PostgreSQL 8.2.

Viele Grüße,
Marc



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