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help / color / mirror / Atom feedFrom: Satoshi Nagayasu <[email protected]>
To: Thom Brown <[email protected]>
Cc: Magnus Hagander <[email protected]>
Cc: pgsql-docs <[email protected]>
Subject: Re: INTEGER range ("-2147483648" is not accepted.)
Date: Tue, 22 Jun 2010 22:37:45 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Thom,
> Actually, come to think of it, shouldn't we have a gotchas page on the wiki?
I agree with that it should be described in some tech document,
but I don't have any good idea where/how it should be written.
Basically, it's a parser issue, but app developers may meet it
on their type casting (my guess), and it's a bit tricky.
Regards,
On 2010/06/22 18:57, Thom Brown wrote:
> On 22 June 2010 10:46, Thom Brown<[email protected]> wrote:
>> On 22 June 2010 09:59, Satoshi Nagayasu<[email protected]> wrote:
>>> Magnus,
>>>
>>> Thanks for your advice. I've understood how it happens.
>>>
>>> However, it looks tricky and difficult to understand,
>>> so I hope that the message could be more understandable
>>> as Thom mentioned.
>>>
>>> Regards,
>>>
>>
>> This does appear to be a gotcha, as the following returns a negative
>> integer as expected:
>>
>> postgres=# SELECT -2147483648;
>> ?column?
>> -------------
>> -2147483648
>> (1 row)
>>
>> postgres=# SELECT pg_typeof(-2147483648);
>> pg_typeof
>> -----------
>> integer
>> (1 row)
>>
>> And just in case...
>>
>> postgres=# SELECT pg_typeof(test.my_num) FROM (SELECT -2147483648) AS
>> test(my_num);
>> pg_typeof
>> -----------
>> integer
>> (1 row)
>>
>> So it's affected by the cast operator?
>>
>> Thom
>>
>
> Actually, come to think of it, shouldn't we have a gotchas page on the wiki?
>
> Thom
>
--
NAGAYASU Satoshi <[email protected]>
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