Re: Cursor fetch performance issue

Tony Capobianco <tcapobianco(at)prospectiv(dot)com> writes:
> Running just the sql of the function returns only 10 rows:
> pg=# SELECT m.memberid, m.websiteid, m.emailaddress,
> pg-# m.firstname, m.lastname, m.regcomplete, m.emailok
> pg-# FROM members m
> pg-# WHERE m.emailaddress LIKE 'test(dot)email(at)hotmail(dot)com'
> pg-# AND m.changedate_id < 5868 ORDER BY m.emailaddress, m.websiteid;

Based on that, I'd bet your problem is that the function is executing
WHERE m.emailaddress LIKE $1
(for some spelling of $1) and you are therefore not getting the benefit
of the index optimizations that can happen when LIKE's pattern is
constant. Do you actually need LIKE rather than just "=" here?

regards, tom lane