Re: index on a box

Dustin Sallings <dustin+postgres@spy.net> writes:
> create function box(point) returns box as
>     'select box($1, $1)'
>     language 'sql';

> misc=# explain select * from tmp where box(point(-121, 37)) @ b;
> NOTICE:  QUERY PLAN:

> Seq Scan on tmp  (cost=0.00..2653.01 rows=61 width=92)

You'd better declare the function as 'iscachable'.  As is, the planner
doesn't trust it to return a constant.

            regards, tom lane