On Wed, Jun 01, 2005 at 11:45:06AM +0200, Marc Mamin wrote:
> TIP 9: the planner will ignore your desire to choose an index scan if your
> joining column's datatypes do not match
>
>
> But INT2, INT4, INT8 and "SERIAL" are considered to be a unique datatype.
> Am I Right?
No, they weren't when this tip was written. As of 8.0 however this tip
is no longer the complete truth; we do allow cross-type index scans.
--
Alvaro Herrera (<alvherre[a]surnet.cl>)
"I suspect most samba developers are already technically insane...
Of course, since many of them are Australians, you can't tell." (L. Torvalds)