I have a similar problem and already considered using RULEs, but I
encountered the problem, that I did not find any way to execute
procedures from RULEs without using SELECT, which creates always a
result set being passed to the application invoking the INSERT, UPDATE
or DELETE, even if the function is declared VOID. This is causing
trouble when using asynchronous command processing.
The solution then is for us to get around to implementing procedures,
rather than functions, in PostgreSQL I think.
Chris
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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
