Re: pg_index.indislossy

> Bruce Momjian wrote:
> > 
> > Can someone tell me what we use indislossy for? 
> 
> IIRC it means that if you get something by this index you must check
> again in the actual data 
> 
> I think that at least the GIST intarray (actually intset) methods use
> it.
> 
> So you probably should _not_ remove it ;)

I did a search and found it used only a few places.  I do not see it
used as part of GIST.  My rememberance is that it is involved in partial
indexes, where you index only certain values in a column.  It was an old
idea that was never working in PostgreSQL.

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