Chris Purcell <[EMAIL PROTECTED]> writes:
> Would the best advice be to get a pg_dump, then drop the database
> entirely and rebuild it?
>> 
>> Definitely.  It's entirely possible for pg_dump to dump successfully
>> from a database that still contains corruption.  An example:
>> broken indexes on user tables.  COPY just does a seqscan and never  
>> looks
>> at the contents of indexes ...

> Just out of curiosity, why is it not possible to rebuild these  
> indices entirely from scratch, dropping the defective file entirely,  
> *without* reimporting into a fresh database?

See REINDEX.  But my point was that there may be undetected corruption.
If I were you I'd not rely on REINDEX to prevent all problems.

                        regards, tom lane

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match

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