On Sat Feb 6 01:20 AM, Tom Lane wrote:
> "Jonathan Bond-Caron" <jbondc@gmail.com> writes:
> > I think part of my problem is I haven't really understood what 'Then
> > make sure you have the right alignment' means.
>
> > My approach currently is:
>
> > After reading HeapTupleHeaderData (23 bytes), I advance another 4
> > bytes
> > (hoff) and try to read a 32 bit integer (first attribute).
>
> No. First you start at the tuple beginning plus the number of bytes
> indicated by hoff (which should be at least 24).
Thanks, much appreciated!
I was reading HeapTupleHeaderData as 23 bytes but it's 27 bytes in
access/htup.h?rev=1.87.
The hoff now makes sense with a 28 bytes value and I can start to read the
user data.