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> Exposing the data will be done via a set returning function. The SRF
> takes two arguments. The maximum number of rows to return and the last
> serial number processed by the reader. The advantage of such SRF is that
> the result can be used in a query that right away delivers audit or
> replication log information in transaction commit order. The SRF can
> return an empty set if no further transactions have committed since, or
> an error if data segments needed to answer the request have already been
> purged.
In light of the proposed purging scheme, how would it be able to distinguish
between those two cases (nothing there yet vs. was there but purged)?
- --
Greg Sabino Mullane greg@turnstep.com
End Point Corporation http://www.endpoint.com/
PGP Key: 0x14964AC8 201005231646
http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8
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