"Diogo Biazus" <[EMAIL PROTECTED]> writes:
> The idea I've been discussing with Simon Riggs is to create a set of
> functions that can be called from within the database.

I'd question that at the very start.  I don't see any strong reason to
do it that way, and as you admit further down it'd make it impossible to
use the viewer to work on extracting data from a failed cluster; which
is, at least in my mind, one of the primary use-cases for the thing.
I would suggest building the xlog-reader as a separate program, not part
of the backend.  It would be useful to have options to (eg) translate
table OIDs to table names, which would require a connection to the
database, but this should be an *option* not an essential condition.

                        regards, tom lane

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