"Michael Richards" <miker(at)interchange(dot)ca> writes:
> Following that I find the 2 word tuple pointers.
> The first word appears to be the offset in the page where the tuple can be
> found but the MSB has to be stripped off (haven't found it's function in the
> source yet).
> The second is the transactionid that, if comitted gives this tuple
> visibility???
No, offset and length --- there is also a 2-bit flags field. Look at
the page and item declarations in src/include/storage/
Someone else was recently working on a bit-level dump tool, but I've
forgotten who.
regards, tom lane