Обсуждение: ERROR: value out of range: underflow
Hi.
I have a simple function.
CREATE OR REPLACE FUNCTION myf_convert_phone18digits(
in_phone VARCHAR
) RETURNS BIGINT
-- IMMUTABLE
AS $$
DECLARE
t_extent_len BIGINT;
t_phone_18 BIGINT;
t_multiplier BIGINT;
BEGIN
IF in_phone IS NULL OR in_phone = '' THEN
RAISE EXCEPTION 'in_phone[%] IS NULL OR =''''!', in_phone;
END IF;
t_extent_len := 18 - length(in_phone);
t_multiplier := 10::BIGINT ^ t_extent_len::BIGINT; --<<< ERROR HERE
t_phone_18 := (in_phone)::BIGINT;
t_phone_18 := t_phone_18 * t_multiplier;
RETURN t_phone_18;
END;
$$ LANGUAGE plpgsql;
When I try it in pgAdmin, first time it show me error:
--
ERROR: value out of range: underflow
CONTEXT: PL/pgSQL function "myf_convert_phone18digits" line 12 at assignment
--
SECOND (and consequences) time it works and just show result 771506000000000000
I get same problem when I try to call query from web (php).
I can't do "second time" here, so web always fail with "ERROR: value
out of range: underflow"
What's the problem? What can I do with it?
--
antonvm
On 26 February 2010 12:02, Anton Maksimenkov <anton200@gmail.com> wrote:
> Hi.
>
> I have a simple function.
> CREATE OR REPLACE FUNCTION myf_convert_phone18digits(
> in_phone VARCHAR
> ) RETURNS BIGINT
> -- IMMUTABLE
> AS $$
> DECLARE
> t_extent_len BIGINT;
> t_phone_18 BIGINT;
> t_multiplier BIGINT;
> BEGIN
>
> IF in_phone IS NULL OR in_phone = '' THEN
> RAISE EXCEPTION 'in_phone[%] IS NULL OR =''''!', in_phone;
> END IF;
>
> t_extent_len := 18 - length(in_phone);
> t_multiplier := 10::BIGINT ^ t_extent_len::BIGINT; --<<< ERROR HERE
> t_phone_18 := (in_phone)::BIGINT;
> t_phone_18 := t_phone_18 * t_multiplier;
>
> RETURN t_phone_18;
>
> END;
> $$ LANGUAGE plpgsql;
>
>
> When I try it in pgAdmin, first time it show me error:
> --
> ERROR: value out of range: underflow
> CONTEXT: PL/pgSQL function "myf_convert_phone18digits" line 12 at assignment
> --
> SECOND (and consequences) time it works and just show result 771506000000000000
>
> I get same problem when I try to call query from web (php).
> I can't do "second time" here, so web always fail with "ERROR: value
> out of range: underflow"
>
> What's the problem? What can I do with it?
> --
> antonvm
>
If t_extent_len is 19 or more, it will fail as it will exceed the
maximum range of bigint.
Are you sure you wish to perform calculations on a phone number? Why
not pad it out? Like: select rpad('2329382',18,'0') which would
return "232938200000000000"
Regards
Thom
On 26/02/2010 12:15, Thom Brown wrote: > On 26 February 2010 12:02, Anton Maksimenkov <anton200@gmail.com> wrote: >> Hi. >> >> I have a simple function. >> CREATE OR REPLACE FUNCTION myf_convert_phone18digits( >> in_phone VARCHAR >> ) RETURNS BIGINT >> -- IMMUTABLE >> AS $$ >> DECLARE >> t_extent_len BIGINT; >> t_phone_18 BIGINT; >> t_multiplier BIGINT; >> BEGIN >> >> IF in_phone IS NULL OR in_phone = '' THEN >> RAISE EXCEPTION 'in_phone[%] IS NULL OR =''''!', in_phone; >> END IF; >> >> t_extent_len := 18 - length(in_phone); >> t_multiplier := 10::BIGINT ^ t_extent_len::BIGINT; --<<< ERROR HERE >> t_phone_18 := (in_phone)::BIGINT; >> t_phone_18 := t_phone_18 * t_multiplier; >> >> RETURN t_phone_18; >> >> END; >> $$ LANGUAGE plpgsql; >> >> >> When I try it in pgAdmin, first time it show me error: >> -- >> ERROR: value out of range: underflow >> CONTEXT: PL/pgSQL function "myf_convert_phone18digits" line 12 at assignment >> -- >> SECOND (and consequences) time it works and just show result 771506000000000000 >> >> I get same problem when I try to call query from web (php). >> I can't do "second time" here, so web always fail with "ERROR: value >> out of range: underflow" >> >> What's the problem? What can I do with it? >> -- >> antonvm >> > > If t_extent_len is 19 or more, it will fail as it will exceed the > maximum range of bigint. I'm curious as to why it worked the second time, when invoked twice in a row from pgAdmin (assuming that it was called with the same argument - the OP didn't say, but I'd imagine that was the case). Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@iol.ie
On 26 February 2010 14:33, Raymond O'Donnell <rod@iol.ie> wrote: > On 26/02/2010 12:15, Thom Brown wrote: >> On 26 February 2010 12:02, Anton Maksimenkov <anton200@gmail.com> wrote: >>> Hi. >>> >>> I have a simple function. >>> CREATE OR REPLACE FUNCTION myf_convert_phone18digits( >>> in_phone VARCHAR >>> ) RETURNS BIGINT >>> -- IMMUTABLE >>> AS $$ >>> DECLARE >>> t_extent_len BIGINT; >>> t_phone_18 BIGINT; >>> t_multiplier BIGINT; >>> BEGIN >>> >>> IF in_phone IS NULL OR in_phone = '' THEN >>> RAISE EXCEPTION 'in_phone[%] IS NULL OR =''''!', in_phone; >>> END IF; >>> >>> t_extent_len := 18 - length(in_phone); >>> t_multiplier := 10::BIGINT ^ t_extent_len::BIGINT; --<<< ERROR HERE >>> t_phone_18 := (in_phone)::BIGINT; >>> t_phone_18 := t_phone_18 * t_multiplier; >>> >>> RETURN t_phone_18; >>> >>> END; >>> $$ LANGUAGE plpgsql; >>> >>> >>> When I try it in pgAdmin, first time it show me error: >>> -- >>> ERROR: value out of range: underflow >>> CONTEXT: PL/pgSQL function "myf_convert_phone18digits" line 12 at assignment >>> -- >>> SECOND (and consequences) time it works and just show result 771506000000000000 >>> >>> I get same problem when I try to call query from web (php). >>> I can't do "second time" here, so web always fail with "ERROR: value >>> out of range: underflow" >>> >>> What's the problem? What can I do with it? >>> -- >>> antonvm >>> >> >> If t_extent_len is 19 or more, it will fail as it will exceed the >> maximum range of bigint. > > I'm curious as to why it worked the second time, when invoked twice in a > row from pgAdmin (assuming that it was called with the same argument - > the OP didn't say, but I'd imagine that was the case). > I'm also curious to know why there's an underflow error instead of overflow. And in fact, even if a 19 digit phone number were passed in, it would only result in a 10^-1 calculation, resulting in 0.1. I think we need to know what value is being passed in to generate this error. Thom
Thom Brown escribió: > On 26 February 2010 14:33, Raymond O'Donnell <rod@iol.ie> wrote: > > On 26/02/2010 12:15, Thom Brown wrote: > >> On 26 February 2010 12:02, Anton Maksimenkov <anton200@gmail.com> wrote: > I'm also curious to know why there's an underflow error instead of > overflow. And in fact, even if a 19 digit phone number were passed > in, it would only result in a 10^-1 calculation, resulting in 0.1. > > I think we need to know what value is being passed in to generate this error. If you pass a string longer than 342 chars it fails with an underflow. Not sure why it doesn't fail the second time, sounds fishy. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
2010/2/26 Anton Maksimenkov <anton200@gmail.com>:
> When I try it in pgAdmin, first time it show me error:
> --
> ERROR: value out of range: underflow
> CONTEXT: PL/pgSQL function "myf_convert_phone18digits" line 12 at assignment
> --
> SECOND (and consequences) time it works and just show result 771506000000000000
Oh, sorry to all. It was:
SELECT myf_convert_phone18digits('7715060');
I still interesting why it fail first time but executed at second.
2010/2/26 Thom Brown <thombrown@gmail.com>:
> Are you sure you wish to perform calculations on a phone number? Why
> not pad it out? Like: select rpad('2329382',18,'0') which would
> return "232938200000000000"
Damn, right! I'll use it.
--
antonvm