Re: No return from trigger function

On Wed, April 8, 2009 16:05, hubert depesz lubaczewski wrote:
> On Wed, Apr 08, 2009 at 03:59:22PM -0400, James B. Byrne wrote:
>> EXCEPTION
>> WHEN unique_violation THEN
>> -- NULL -- do nothing
>>
>> RETURN NULL; -- AFTER trigger results are ignored anyway
>> END;
>
> exception is part of begin/exception/end; block
> so you will need one more begin and one more end;
>

Does this mean that the example given on pg. 798 of the manual is in
error, or have I misread it?

-- Insert or update the summary row with the new values.
<<insert_update>>
LOOP
UPDATE sales_summary_bytime
SET amount_sold = amount_sold + delta_amount_sold,
units_sold = units_sold + delta_units_sold,
amount_cost = amount_cost + delta_amount_cost
WHERE time_key = delta_time_key;
EXIT insert_update WHEN found;
BEGIN
INSERT INTO sales_summary_bytime (
time_key,
amount_sold,
units_sold,
amount_cost)
VALUES (
delta_time_key,
delta_amount_sold,
delta_units_sold,
delta_amount_cost
);
EXIT insert_update;
EXCEPTION
WHEN UNIQUE_VIOLATION THEN
-- do nothing
END;
END LOOP insert_update;
RETURN NULL;
END;

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