On 2/15/07, Guillaume Smet <guillaume.smet@xxxxxxxxx> wrote:
On 2/15/07, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: > I think that the > answer is probably "because the index is lossy for this operator, > so it has to be checked even if the bitmap didn't become lossy". > You'd have to check the GIST opclass definition to be sure.
FYI I've taken a look at PostGIS source code and the index is lossy for the operator &&: OPERATOR 3 && RECHECK, (for every operator in the opclass to be exact) -- Guillaume
