Ioana Danes <[EMAIL PROTECTED]> writes:
> Does anyone now what the problem is with the following select when
> upgrading to postgresql 8.1.4 the query plan does not use the indexes as in
> postgresql 8.0.3.
The planner doesn't have enough information about the correlation
between testtype and testid to guess that the index-driven max()
optimization doesn't work well in this case. But I see you've
already found the solution ...
regards, tom lane
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
