[SQL] plpgsql notify trigger

[George Young]

[postgres 7.0.2, x86 linux]

I am trying to use a trigger to perform an sql 'notify' command.
I do something like:

CREATE FUNCTION run_changed() RETURNS opaque AS '
   declare
      nm text;
   begin
       nm := NEW.run_name;
       notify nm
       return null;
   end;        
' LANGUAGE 'plpgsql';

create trigger run_changed_tr after update on runs for each row
       execute procedure run_changed();


BUT, when I update the table, I get:
   ERROR:  parser: parse error at or near "$1"     

It looks like the *name* (or it's alias here: $1.run_name), not the *value* of the 
variable nm,
is passwd to the notify command.  Since notify only takes a name, not a string,
I don't see how to proceed.  

Is there some way in plsql to construct a string and have it executed in sql?

disappointed in plsql,
        George

--
George Young,  Rm. L-204                [EMAIL PROTECTED]
MIT Lincoln Laboratory
244 Wood St.
Lexington, Massachusetts  02420-9108    (781) 981-2756