Hi,
On 2017-04-15 05:18:49 +0200, Petr Jelinek wrote:
> Hi, here is updated patch (details inline).
I'm not yet all that happy, sorry:
Looking at 0001:
- GetOldestSafeDecodingTransactionId() only guarantees to return an xid
safe for decoding (note how procArray->replication_slot_catalog_xmin
is checked), not one for the initial snapshot - so afaics this whole
exercise doesn't guarantee much so far.
- A later commit introduces need_full_snapshot as a
CreateInitDecodingContext, but you don't use it, not here. That seems
wrong.
- I remain unhappy with the handling of the reset of effective_xmin in
FreeDecodingContext(). What if we ERROR/FATAL out before that happens?
What do you think about something like the attached? I've not yet
tested it any way except running the regression tests.
- Andres
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