Using triggers with non-C functions - Mailing list pgsql-hackers

Now that I know that triggers can call non-C functions, I would like to
know how non-C functions access information about the triggered row.

I see plpgsql has an interface to the trigger information.  Do SQL
functions us OLD/NEW to reference that information, like they do in
rules?

The trigger programmers guide page says PROCEDURE is a C function, so I
will need to correct that:
Procedure     The procedure name is the C function called. 


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