"Jaime Casanova" <[EMAIL PROTECTED]> writes:
> http://archives.postgresql.org/pgsql-committers/2007-07/msg00142.php
> at least the part that prevents overflow and probably the one that
> reject zero in BY are clearly bugs and should be backpatched to 8.2,
> aren't they?

Well, it's a behavioral change, so given the lack of complaints from the
field I'm inclined not to back-patch.

                        regards, tom lane

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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

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