s anwar <sanwar@gmail.com> writes: > I have a very simple setup. I have one table with ~65000 tuples consuming > ~8500 pages (reltuples and relpages as per pg_class). I have defined two > indices on table, t1_id1 which indexes "t1(id1)" which consumes 194 pages; > and t1_id1_v1 which indexes "t1(id1) where id1=3D9999" which consumes 4 pag= > es. > When I run an "explain select * from t1 where id1=3D9999;" it chooses to > index-scan the t1_id1 index instead of t1_id1_v1 index, even though that th= > e > where-clause uses an equal comparison and there is a smaller index defined > on t1 limited to the value of id1 to 9999.
What's the datatype of id1? There are some limitations in the current code about recognizing cross-type WHERE conditions ...
