"scott" == scott marlowe <[EMAIL PROTECTED]> writes:
[...]
scott> Note here:
scott> Merge Join (cost=1788.68..4735.71 rows=1 width=85) (actual scott> time=597.540..1340.526 rows=20153 loops=1) Merge Cond: scott> ("outer".id = "inner".id)
scott> This estimate is WAY off. Are both of those fields indexed scott> and analyzed? Have you tried upping the statistics target on scott> those two fields? I assume they are compatible types.
Should I understand that a join on incompatible types (such as integer and varchar) may lead to bad performances ?
Conversely, you should enforce strict type compatibility in comparisons for getting any good plans..:-)
Shridhar
---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
