> Description: Optimizer does not use function-based index for an order > by > Details: > > Subject line says it all.
The optimizer makes an educated guess about whether to use indexes or not. Without more information it's impossible to second-guess it. You might want to ask on pgsql-general for advice on whether it's making a good choice and how to influence it. But you'll have to provide more information such as the actual schema and explain plans of with and without enable_sort or enable_seqscan disabled. Also 8.2 came out two years ago, if you're just starting with Postgres you might as well use 8.4 which has features which will make this easier -- including the ability to tell the planner how expensive your function is. -- greg http://mit.edu/~gsstark/resume.pdf -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
