Re: [HACKERS] logical decoding of two-phase transactions

On Wed, Feb 1, 2017 at 4:35 PM, Craig Ringer <craig@2ndquadrant.com> wrote:
> Right. Per my comments uothread I don't see why we need to add anything more
> to WAL here.
>
> Stas was concerned about what happens in logical decoding if we crash
> between PREPSRE TRANSACTION and COMMIT PREPARED. But we'll always go back
> and decode the whole txn again anyway so it doesn't matter.
>
> We can just track it on ReorderBufferTxn when we see it at PREPARE
> TRANSACTION time.

Oh, hmm.  I guess if that's how it works then we don't need it in WAL
after all.  I'm not sure that re-decoding the already-prepared
transaction is a very good plan, but if that's what we're doing anyway
this patch probably shouldn't change it.

-- 
Robert Haas
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