Jeffrey Tenny <[EMAIL PROTECTED]> writes:
> Would I be correct in assuming that the following two indexes are 
> completely redundant except for the fact that one complains about 
> uniqueness constraint violations and the other does not?

Yup ...

                        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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