> What I find just about as objectionable as the old haskeytype hack is
> that the user has to tell you whether the index is lossy or not. This
> should be a property available from the system catalogs. Not sure where
> to put it; do we need another column in pg_opclass, or is someplace
> other than the opclass needed?
>
So, may by add to pg_opclass two fields?
bool is_varlena_key
bool is_lossy_compress
Then index_formtuple must look at is_varlena_key and 'with (islossy)'
could be determined automatically by view at used ops.
--
Teodor Sigaev
teodor(at)stack(dot)net