Tom Lane wrote:
>
> Brook Milligan <brook@biology.nmsu.edu> writes:
> >> Jan, does this mean that we can also lose the "rewrite string too big"
> >> problem with rules?
>
> > No. We have to have long tuples.
>
> > Darn. Oh well, I guess this is a major step in that direction.
>
> I'm hoping that once this is done, someone who knows the guts of the
> storage managers better than I will feel motivated to work on letting
> stored tuples cross block boundaries. (Paging Vadim...) That seems
> to be the last piece of the puzzle.
You know that I'm busy with WAL...
And I already made some step in big tuples dirrection
when made memory/disk tuple presentations different -:)
typedef struct HeapTupleData
{ uint32 t_len; /* length of *t_data */ ItemPointerData t_self; /* SelfItemPointer */
HeapTupleHeadert_data; /* */ ^^^^^^^^^^^^^^^^^^^^^^ On-disk data
} HeapTupleData;
I hope that something could be added here for tuple chunks...
TupleTableSlot.ttc_buffer (and ttc_shouldFree?) is good candidate
to be moved here from TupleTableSlot.
As for smgr part - it's not hard at all.
Vadim
