On Fri, 25 Jul 2003, Stephan Szabo wrote: > On Fri, 25 Jul 2003, Elielson Fontanezi wrote: > > > What can I do in this case? > > I could not found anything about iscachable. > > > > > > postgres$ cat in.sql > > create index bt_proposta_f01 on proposta > > using btree (func_cod_secretaria(nr_proponente)); > > > > postgres$ psql -d escola -f in.sql > > psql:in.sql:2: ERROR: DefineIndex: index function must be marked iscachable > > Check the create function reference page, I believe you'd need to add WITH > (iscachable) to the end of the function creation. > > iscachable means that the function always returnes the same result when > given the same arguments. It's a prereq to using the function in an > index. If your function doesn't meet those requirements (for example if it > does a query on a table) making an index on that function is a bad idea.
Almost forgot. In recent versions you'd specify that the function was IMMUTABLE and I believe the error message would use such as well. What version are you using (it might be worth considering an upgrade to 7.4 when it comes out) ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
