Jeff Davis <[EMAIL PROTECTED]> writes:
> Just to be sure: a backwards-started scan is currently unreachable code,
> correct? 

[ yawn... ]  I think so, but I wouldn't swear to it right at the moment.
In any case it doesn't seem like a path that we need to optimize.

                        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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