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ClickHouse: better type of result of minus() and negate(). [#CONV-8890]

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This commit is contained in:
Michael Kolupaev 2013-10-08 12:48:55 +00:00
parent dc3d84ac93
commit 1f9cd062e9
1 changed files with 6 additions and 18 deletions
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24
dbms/include/DB/Functions/NumberTraits.h
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@ -108,24 +108,9 @@ namespace NumberTraits
template <typename A, typename B> struct ResultOfSubtraction
{
typedef typename Construct<
typename boost::mpl::if_<
typename boost::mpl::and_<
typename boost::mpl::not_<typename Traits<A>::Sign>,
typename boost::mpl::not_<typename Traits<A>::Floatness>,
typename boost::mpl::not_<typename Traits<B>::Floatness>,
typename boost::mpl::greater<typename Traits<A>::Bits, typename Traits<B>::Bits> >,
Unsigned,
Signed>::type,
Signed,
typename boost::mpl::or_<typename Traits<A>::Floatness, typename Traits<B>::Floatness>::type,
typename boost::mpl::if_<
typename boost::mpl::and_<
typename boost::mpl::not_<typename Traits<A>::Sign>,
typename boost::mpl::not_<typename Traits<B>::Sign>,
typename boost::mpl::not_<typename Traits<A>::Floatness>,
typename boost::mpl::not_<typename Traits<B>::Floatness>,
typename boost::mpl::greater<typename Traits<A>::Bits, typename Traits<B>::Bits> >,
typename Traits<A>::Bits,
typename Next<typename boost::mpl::max<typename Traits<A>::Bits, typename Traits<B>::Bits>::type>::Type>::type>::Type Type;
typename Next<typename boost::mpl::max<typename Traits<A>::Bits, typename Traits<B>::Bits>::type>::Type>::Type Type;
};
/** При делении всегда получается число с плавающей запятой.
@ -163,7 +148,10 @@ namespace NumberTraits
typedef typename Construct<
Signed,
typename Traits<A>::Floatness,
typename Traits<A>::Bits>::Type Type;
typename boost::mpl::if_<
typename Traits<A>::Sign,
typename Traits<A>::Bits,
typename Next<typename Traits<A>::Bits>::Type>::type>::Type Type;
};
/** При побитовых операциях получается целое число, битность которого равна максимальной из битностей аргументов.