The following bug has been logged online: Bug reference: 5000 Logged by: Brian Ceccarelli Email address: cecca...@talusmusic.com PostgreSQL version: 8.2.13 Operating system: Linux Description: Optimizer does not use function-based index for an order by Details:
Subject line says it all. I have a function-based index on a large table. select * from net32_product_def order by (f_squash_descr(descr::text)) create unique index net32_product_def_text_idx on net32_product_def ( f_squash_descr(descr) ) The explain plan says that Postgres always does a table scan instead of using the index. The table is 500,000 rows long, and the function f_squash_descr() is a CPU-instensive operation. What should come instantly, takes 1 minute. -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
