Re: Planning to force reindex of hash indexes

"Tom Lane" <tgl@sss.pgh.pa.us> wrote:
> I've found a number of infelicities in the hash index code that can't be
> fixed without an on-disk format change.  The biggest one is that the 
> hashm_ntuples field in hash meta pages is only uint32, meaning that
> hash index space management will become confused if the number of
> entries exceeds 4G.  I'd like to change it to a "double", and clean up
> a couple other uglinesses at the same time.

How can we avoid this kind of mess for the future ?

Regards
Gaetano Mendola