Steve Crawford wrote: > Is there a way to force a specific index to be removed from > consideration in planning a single query? > > Specifically, on a 60-million-row table I have an index that is a > candidate for removal. I have identified the sets of nightly queries > that use the index but before dropping it I would like to run > EXPLAIN and do timing tests on the queries to see the impact of not > having that index available and rewrite the query to efficiently use > other indexes if necessary. If you can afford to lock the table for a while, the easiest is BEGIN; DROP INDEX bothersome_idx; EXPLAIN your_query; ROLLBACK; -- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
