Tomasz Ostrowski <[EMAIL PROTECTED]> writes:
> So why estimate regex expressions if there is no estimation possible?
> Let's set this estimate to be pessimistic (match everything or
> everything not null) and it will choose better plans.
Better plans for this specific example, worse plans for other cases.
Life is not that simple.
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
