Ulrich Habel wrote: > Hello all, > had an idea of optimizing a query that may work generally. > > In case a 'column' is indexed, following two alterations could be done > I think: > > A) > > select ... where column ~ '^Foo' --> Seq Scan
This is not true. You can make this query use an index if you create it with opclass varchar_pattern_ops or text_pattern_ops, as appropiate. Thus you don't need any hack here. -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
