Re: [GENERAL] Dump/restore with bad data and large objects

Joshua

The TOC feature sounds good, as does converting a single table to plain text.

But I can't find documentation for the TOC feature under pg_dump or pg_restore. I'm looking in postgresql-8.2.1-US.pdf.

Neither could I see anything about converting a single table to a plain text dump.

Also, I stumbled across the statement that you can't restore large objects for a single table. Is that true?

Another thing I couldn't find was how to dump roles using -Fc.

John

On Mon, 25 Aug 2008 10:04:13 -0700, Joshua Drake wrote:

>On Mon, 25 Aug 2008 10:21:54 -0400
>"John T. Dow" <john@johntdow.com> wrote:
>
>> By "bad data", I mean a character that's not UTF8, such as hex 98.
>>
>> As far as I can tell, pg_dump is the tool to use. But it has
>> serious drawbacks.
>>
>> If you dump in the custom format, the data is compressed (nice) and
>> includes large objects (very nice). But, from my tests and the
>> postings of others, if there is invalid data in a table, although
>> PostgreSQL won't complain and pg_dump won't complain, pg_restore will
>> strenuously object, rejecting all rows for that particular table (not
>> nice at all).
>
>You can use the TOC feature of -Fc to remove restoring of that single
>table. You can then convert that single table to a plain text dump and
>clean the data. Then restore it separately.
>
>If you have foregin keys and indexes on the bad data table, don't
>restore the keys until *after* you have done the above.
>
>Sincerely,
>
>Joshua D. Drake
>
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