On Sun, Jan 23, 2005 at 03:19:10PM -0600, Jim C. Nasby wrote: > > People have this weird notion that an index-based plan is always faster > > than anything else. If you like you can try the operation with "set > > enable_seqscan = off", but I bet it will take longer. > > Well, every other database I've used can do index covering, which means > index scans *are* faster.
... on those database systems. Indexes are different in Postgres in general: they don't have visibility info (other systems don't need it, tuples are always visible), and in some databases you have clustered indexes, where the index is also the heap. -- Alvaro Herrera (<[EMAIL PROTECTED]>) "We are who we choose to be", sang the goldfinch when the sun is high (Sandman) ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
