Re: Index usage problem on 8.3.3

Tom Lane wrote:
> Okay. What that means is that the indexes were created on data that had
> already been inserted and updated to some extent, resulting in
> HOT-update chains that turned out to be illegal for the new indexes.
> The way we deal with this is to mark the indexes as not usable by any
> query that can still see the dead HOT-updated tuples.
>
> Your best bet for dodging the problem is probably to break the operation
> into two transactions, if that's possible. INSERT and UPDATE in the
> first xact, create the indexes at the start of the second. (Hmm ...
> I'm not sure if that's sufficient if there are other concurrent
> transactions; but it's certainly necessary.) Another possibility is
> to create the indexes just after data load, before you start updating
> the columns they're on.
>
>
Thanks Tom!

Any idea why I don't see it on 8.3.4?

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