Andrew Dunstan <[EMAIL PROTECTED]> writes:
> ... and then it wouldn't be an issue at all, but I know some people don't 
> like early function returns - is there a general postgres style rule 
> about it?

Hardly; we do that a lot.  Write it however it seems clearest.

                        regards, tom lane

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TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

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