"Jonathan Ellis" <jonathan@xxxxxxxxxxxxxx> writes: > On 4/6/07, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: >> Yeah, it sure is the same plan, and 8.2 seems to be a tad faster right >> up to the hash join on user_id. Is user_id a textual datatype? > user_id is an int; they are both C locale. Really!? So much for that theory. Is work_mem set similarly on both installations? The only other thing I can think is that you've exposed some unfortunate corner case in the hash join logic. Would you be willing to send me (off-list) the lists of user_ids being joined? That would be the clan_members.user_id column and the user_id column from the join of parties and clan_participants. regards, tom lane
