Hicham For your experiments (VLDB ? :-) your best bet of specifically bolting on a plan (if you can't convince the optimizer to do the right thing) is to hack it in the query planner.
I've done similar hacks in the past, but only in the TelegraphCQ code and not in PostgreSQL. -- Pip-pip Sailesh http://www.cs.berkeley.edu/~sailesh ---------------------------(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
