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Re: Fixing up a corrupted toast table

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On Mar 8, 2006, at 3:07 PM, Tom Lane wrote:

Steve Atkins <steve@xxxxxxxxxxx> writes:
make it happy by inserting a dummy row into the toast table (chunk ID
as specified in the error, chunk sequence 0, any old data value).

Any attempt to touch the toast table gives me:
ERROR:  cannot change TOAST relation "pg_toast_17410"

Ugh. Maybe we should allow superusers to do that? Or is it too much of
a foot-gun?

It turns out that you don't need to do this to delete bad rows once
you've found the ctid, so it's not relevant here.

If I set relkind to 'r' for the toast table, shove some fake data
in there and set it back to 't' that should do it, shouldn't it?

Offhand I think this would work, but suggest trying it in a scratch
database first ...

Seems to work. I'm just using it to replicate the damage in a test
database.

(For the archives - I have a perl script to find the ctid of damaged
rows reliably and remove them that works on the test database.
We'll see if it works in production.)

Cheers,
  Steve


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