> Is this way of handling exceptions possible in postgres ? > If so, what is the normal way to handle this exceptions, from a > plpgsql/trigger(rule??) perspective ?
8.0 should allow you to do this. 7.4 you need to perform your own checks
and catch whether they succeed or fail.
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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
