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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