CREATE PROCEDURE sp_myproc 
    @a VARCHAR(250), 
    @b VARCHAR(250)
  AS 
  
  BEGIN TRAN
  
  ..bunch of code..
  
  DECLARE @id NUMERIC, @newid NUMERIC

  SELECT @id = id, @newid = (id + 1) 
  FROM sometable 
  WHERE (some condition)
  
  ..more bunch of code..
  
  -- Now, insert a new record in request
  INSERT INTO anothertable (id, othercols)
  VALUES (@id, othervals)
  
  -- Update the request id
  UPDATE yetanothertable 
  SET id = @newid 
  WHERE (someothercondition)
  
  COMMIT TRAN
  
  RETURN @id

##</code><code>##

my $sth = $dbh->prepare("EXEC sp_myproc ?, ?");
my $id = $sth->execute('foo', 'bar');