Re: Error: Operator does not exist: "char"=integer

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От Aarni
Тема Re: Error: Operator does not exist: "char"=integer
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Msg-id 200812191147.39589.aarni@kymi.com
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Ответ на Re: Error: Operator does not exist: "char"=integer  (Gregory Stark <stark@enterprisedb.com>)
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On Friday 19 December 2008 01:29:06 you wrote:
> Aarni <aarni@kymi.com> writes:
> > "ERROR:  operator does not exist: character varying = integer at
> > character 286 HINT:  No operator matches the given name and argument
> > type(s). You might need to add explicit type casts."
> >
> > Quick fix to sql statements eg.
> >
> > ... WHERE CAST (your_char AS INTEGER) = integer ...
> > ... WHERE CAST (your_char AS INTEGER) IN (1,2,3,...)
>
> Note that this is *not* what was happening in 8.2. There it was casting
> them to text and doing a text comparison. In the case of integer and
> equality they're probably equivalent. However < and > will behave quite
> differently. That's why the casts disappeared -- you probably weren't
> running the queries you thought you were running in 8.2 and previously.

Hi Gregory,

Hmm, yes I did note this. Afterwards, though.

"Previously ... was automatically cast to text, for most (though not all)
built-in data type ... automatic casts too often caused surprising behavior."

Luckily enough, I did not get funny or unexpected results with the few queries
in one particular application I had to fix for 8.3.3.

Best regards,

--
Aarni Ruuhimäki


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