Vitaly, > I am using the newer 7.5dev native Windows port. For this reason I > don't think that IN will cause any trouble (I read that this issue was > resolved in 7.4).
Well, for performance, all bets are off for the dev Windows port. Last I checked, the Win32 team was still working on *stability* and hadn't yet even looked at performance. Not that you can't improve the query, just that it might not fix the problem. Therefore ... your detailed feedback is appreciated, especially if you can compare stuff to the same database running on a Linux, Unix, or BSD machine. -- Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match