Re: pgsql is 75 times faster with my new index scan

Hannu Krosing wrote:

>
> >
> > TODO:
> > - add HeapTupleHeaderData into each IndexTupleData
> > - change code to reflect above
> > - when deleting-updating heap then also update tuples'
> >   HeapTupleHeaderData in indices
>
> I doubt everyone would like trading query speed for insert/update
> speed plus index size
>
> Perhaps this could be implemented as a special type of index which
> you must explicitly specify at create time ?
>
> > The last step could be done in two ways. First by limiting
> > number of indices for one table we can store coresponding
> > indices' TIDs in each heap tuple. The update is then simple
> > taking one disk write.
>
> Why limit it ? One could just save an tid array in each tuple .
>

Indice's TIDs are transient.
Isn't it useless to store indice's TIDs ?

Regards.

Hiroshi Inoue