Re: [Firebird-devel] Firebird Transaction ID limit solution

[Kjell R. <kje...@da...>]

Den 2011-12-31 15:08 skrev Dmitry Yemanov såhär:
> 31.12.2011 17:57, Alexander Peshkov wrote:
>
>> This will make each version of the record (not the record- but EACH
>> version of it) 4 bytes longer.
> Not strictly necessary. We could use a variable-length encoding for txn
> ids longer than 32 bits and mark such records with a new flag. It would
> add zero storage/performance overhead for all the current applications
> but allow longer txn ids for the slightly bigger cost. It would increase
> the code complexity though.

Are there unused flag bits available in the current record format, that 
could be used for this purpose? Or how are such flag bits encoded?

Kjell

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