Re: Wrong plan sequential scan instead of an index one - Mailing list pgsql-performance

Richard Huxton <dev@archonet.com> writes:
> Ah, but it's got no way of knowing what matches you'll get for
> '%anything%'. There's no easy way to get statistics for matching substrings.

8.2 actually tries the match on the most-common-values list, if said
list is big enough (I think the threshold is stats target = 100).
Not sure if that will help here, though.

            regards, tom lane