Re: Database corruption

Shane wrote:
> Hello all,
> 
> Whilst running a regular pg_dumpall, I received the
> following error from our spamassassin DB.
> 
> pg_dump: ERROR:  could not access status of transaction
> 4521992
> DETAIL:  could not open file "pg_clog/0004": No such file
> or directory
> pg_dump: SQL command to dump the contents of table
> "bayes_token" failed: PQendcopy() failed.
> pg_dump: Error message from server: ERROR:  could not
> access status of transaction 4521992
> DETAIL:  could not open file "pg_clog/0004": No such file
> or directory
> pg_dump: The command was: COPY public.bayes_token (id,
> token, spam_count, ham_count, atime) TO stdout;
> pg_dumpall: pg_dump failed on database "spamassassin",
> exiting
> 
> It's clear something's amiss with the database but I'm not
> sure where to go from here.  Is any data from bayes_token
> recoverable, should I just delete the data in that table or
> does the whole database need to be dropped and recreated?

Hang on.  You may still recover the data.  What range of files do you
see in the pg_clog directory?  Also, what version is this?

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.