hello. I think that left/right joins and limit may be optimized. When there aren't WHERE conditions this may be executed as below:
Limit N
Merge Left Join
Sort Top N
Bitmap Heap Scan
...
Sort
Bitmap Heap Scan
...
------------
pasman
--
Sent via pgsql-general mailing list ([email protected])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
