Hi, I'm using PG 8.0.3 and recently spotted a query that was not using a multi-column index I had created. The index looks like:
CREATE INDEX ..... ON FooTable(fkColumnOne, fkColumnTwo); The query that was not using the index was using: SELECT .... a bunch of columns and joins .... WHERE FooTable.fkColumnTwo=1000; So I added another index where the indexed columns are flipped: CREATE INDEX ..... ON FooTable(fkColumnTwo, fkColumnOne); Now the query started to use that index -- gooooood! But now I have 2 indices that are nearly the same, and that means overhead during INSERTs/DELETEs. :( Is there a way to get this to use that first index, so I don't have to have this additional index? If I had PG 8.1.3, would PG know how to use that first index? I seem to recall something about this somewhere... but I don't see it at http://www.postgresql.org/docs/whatsnew . Thanks, Otis ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
