mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 13:42:02 +00:00
313 lines
11 KiB
C++
313 lines
11 KiB
C++
#pragma once
|
|
|
|
#include <common/arithmeticOverflow.h>
|
|
#include <Core/Block.h>
|
|
#include <Core/AccurateComparison.h>
|
|
#include <Core/callOnTypeIndex.h>
|
|
#include <DataTypes/DataTypesDecimal.h>
|
|
#include <Columns/ColumnVector.h>
|
|
#include <Columns/ColumnsNumber.h>
|
|
#include <Columns/ColumnConst.h>
|
|
#include <Functions/FunctionHelpers.h> /// TODO Core should not depend on Functions
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int DECIMAL_OVERFLOW;
|
|
}
|
|
|
|
///
|
|
inline bool allowDecimalComparison(const DataTypePtr & left_type, const DataTypePtr & right_type)
|
|
{
|
|
if (isDecimal(left_type))
|
|
{
|
|
if (isDecimal(right_type) || isNotDecimalButComparableToDecimal(right_type))
|
|
return true;
|
|
}
|
|
else if (isNotDecimalButComparableToDecimal(left_type) && isDecimal(right_type))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
template <size_t > struct ConstructDecInt { using Type = Int32; };
|
|
template <> struct ConstructDecInt<8> { using Type = Int64; };
|
|
template <> struct ConstructDecInt<16> { using Type = Int128; };
|
|
|
|
template <typename T, typename U>
|
|
struct DecCompareInt
|
|
{
|
|
using Type = typename ConstructDecInt<(!IsDecimalNumber<U> || sizeof(T) > sizeof(U)) ? sizeof(T) : sizeof(U)>::Type;
|
|
using TypeA = Type;
|
|
using TypeB = Type;
|
|
};
|
|
|
|
///
|
|
template <typename A, typename B, template <typename, typename> typename Operation, bool _check_overflow = true,
|
|
bool _actual = IsDecimalNumber<A> || IsDecimalNumber<B>>
|
|
class DecimalComparison
|
|
{
|
|
public:
|
|
using CompareInt = typename DecCompareInt<A, B>::Type;
|
|
using Op = Operation<CompareInt, CompareInt>;
|
|
using ColVecA = std::conditional_t<IsDecimalNumber<A>, ColumnDecimal<A>, ColumnVector<A>>;
|
|
using ColVecB = std::conditional_t<IsDecimalNumber<B>, ColumnDecimal<B>, ColumnVector<B>>;
|
|
using ArrayA = typename ColVecA::Container;
|
|
using ArrayB = typename ColVecB::Container;
|
|
|
|
DecimalComparison(Block & block, size_t result, const ColumnWithTypeAndName & col_left, const ColumnWithTypeAndName & col_right)
|
|
{
|
|
if (!apply(block, result, col_left, col_right))
|
|
throw Exception("Wrong decimal comparison with " + col_left.type->getName() + " and " + col_right.type->getName(),
|
|
ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
|
|
static bool apply(Block & block, size_t result [[maybe_unused]],
|
|
const ColumnWithTypeAndName & col_left, const ColumnWithTypeAndName & col_right)
|
|
{
|
|
if constexpr (_actual)
|
|
{
|
|
ColumnPtr c_res;
|
|
Shift shift = getScales<A, B>(col_left.type, col_right.type);
|
|
|
|
c_res = applyWithScale(col_left.column, col_right.column, shift);
|
|
if (c_res)
|
|
block.getByPosition(result).column = std::move(c_res);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool compare(A a, B b, UInt32 scale_a, UInt32 scale_b)
|
|
{
|
|
static const UInt32 max_scale = maxDecimalPrecision<Decimal128>();
|
|
if (scale_a > max_scale || scale_b > max_scale)
|
|
throw Exception("Bad scale of decimal field", ErrorCodes::DECIMAL_OVERFLOW);
|
|
|
|
Shift shift;
|
|
if (scale_a < scale_b)
|
|
shift.a = DataTypeDecimal<B>(maxDecimalPrecision<B>(), scale_b).getScaleMultiplier(scale_b - scale_a);
|
|
if (scale_a > scale_b)
|
|
shift.b = DataTypeDecimal<A>(maxDecimalPrecision<A>(), scale_a).getScaleMultiplier(scale_a - scale_b);
|
|
|
|
return applyWithScale(a, b, shift);
|
|
}
|
|
|
|
private:
|
|
struct Shift
|
|
{
|
|
CompareInt a = 1;
|
|
CompareInt b = 1;
|
|
|
|
bool none() const { return a == 1 && b == 1; }
|
|
bool left() const { return a != 1; }
|
|
bool right() const { return b != 1; }
|
|
};
|
|
|
|
template <typename T, typename U>
|
|
static auto applyWithScale(T a, U b, const Shift & shift)
|
|
{
|
|
if (shift.left())
|
|
return apply<true, false>(a, b, shift.a);
|
|
else if (shift.right())
|
|
return apply<false, true>(a, b, shift.b);
|
|
return apply<false, false>(a, b, 1);
|
|
}
|
|
|
|
template <typename T, typename U>
|
|
static std::enable_if_t<IsDecimalNumber<T> && IsDecimalNumber<U>, Shift>
|
|
getScales(const DataTypePtr & left_type, const DataTypePtr & right_type)
|
|
{
|
|
const DataTypeDecimal<T> * decimal0 = checkDecimal<T>(*left_type);
|
|
const DataTypeDecimal<U> * decimal1 = checkDecimal<U>(*right_type);
|
|
|
|
Shift shift;
|
|
if (decimal0 && decimal1)
|
|
{
|
|
auto result_type = decimalResultType(*decimal0, *decimal1, false, false);
|
|
shift.a = result_type.scaleFactorFor(*decimal0, false);
|
|
shift.b = result_type.scaleFactorFor(*decimal1, false);
|
|
}
|
|
else if (decimal0)
|
|
shift.b = decimal0->getScaleMultiplier();
|
|
else if (decimal1)
|
|
shift.a = decimal1->getScaleMultiplier();
|
|
|
|
return shift;
|
|
}
|
|
|
|
template <typename T, typename U>
|
|
static std::enable_if_t<IsDecimalNumber<T> && !IsDecimalNumber<U>, Shift>
|
|
getScales(const DataTypePtr & left_type, const DataTypePtr &)
|
|
{
|
|
Shift shift;
|
|
const DataTypeDecimal<T> * decimal0 = checkDecimal<T>(*left_type);
|
|
if (decimal0)
|
|
shift.b = decimal0->getScaleMultiplier();
|
|
return shift;
|
|
}
|
|
|
|
template <typename T, typename U>
|
|
static std::enable_if_t<!IsDecimalNumber<T> && IsDecimalNumber<U>, Shift>
|
|
getScales(const DataTypePtr &, const DataTypePtr & right_type)
|
|
{
|
|
Shift shift;
|
|
const DataTypeDecimal<U> * decimal1 = checkDecimal<U>(*right_type);
|
|
if (decimal1)
|
|
shift.a = decimal1->getScaleMultiplier();
|
|
return shift;
|
|
}
|
|
|
|
template <bool scale_left, bool scale_right>
|
|
static ColumnPtr apply(const ColumnPtr & c0, const ColumnPtr & c1, CompareInt scale)
|
|
{
|
|
auto c_res = ColumnUInt8::create();
|
|
|
|
if constexpr (_actual)
|
|
{
|
|
bool c0_is_const = c0->isColumnConst();
|
|
bool c1_is_const = c1->isColumnConst();
|
|
|
|
if (c0_is_const && c1_is_const)
|
|
{
|
|
const ColumnConst * c0_const = checkAndGetColumnConst<ColVecA>(c0.get());
|
|
const ColumnConst * c1_const = checkAndGetColumnConst<ColVecB>(c1.get());
|
|
|
|
A a = c0_const->template getValue<A>();
|
|
B b = c1_const->template getValue<B>();
|
|
UInt8 res = apply<scale_left, scale_right>(a, b, scale);
|
|
return DataTypeUInt8().createColumnConst(c0->size(), toField(res));
|
|
}
|
|
|
|
ColumnUInt8::Container & vec_res = c_res->getData();
|
|
vec_res.resize(c0->size());
|
|
|
|
if (c0_is_const)
|
|
{
|
|
const ColumnConst * c0_const = checkAndGetColumnConst<ColVecA>(c0.get());
|
|
A a = c0_const->template getValue<A>();
|
|
if (const ColVecB * c1_vec = checkAndGetColumn<ColVecB>(c1.get()))
|
|
constant_vector<scale_left, scale_right>(a, c1_vec->getData(), vec_res, scale);
|
|
else
|
|
throw Exception("Wrong column in Decimal comparison", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
else if (c1_is_const)
|
|
{
|
|
const ColumnConst * c1_const = checkAndGetColumnConst<ColVecB>(c1.get());
|
|
B b = c1_const->template getValue<B>();
|
|
if (const ColVecA * c0_vec = checkAndGetColumn<ColVecA>(c0.get()))
|
|
vector_constant<scale_left, scale_right>(c0_vec->getData(), b, vec_res, scale);
|
|
else
|
|
throw Exception("Wrong column in Decimal comparison", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
else
|
|
{
|
|
if (const ColVecA * c0_vec = checkAndGetColumn<ColVecA>(c0.get()))
|
|
{
|
|
if (const ColVecB * c1_vec = checkAndGetColumn<ColVecB>(c1.get()))
|
|
vector_vector<scale_left, scale_right>(c0_vec->getData(), c1_vec->getData(), vec_res, scale);
|
|
else
|
|
throw Exception("Wrong column in Decimal comparison", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
else
|
|
throw Exception("Wrong column in Decimal comparison", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
}
|
|
|
|
return c_res;
|
|
}
|
|
|
|
template <bool scale_left, bool scale_right>
|
|
static NO_INLINE UInt8 apply(A a, B b, CompareInt scale [[maybe_unused]])
|
|
{
|
|
CompareInt x = a;
|
|
CompareInt y = b;
|
|
|
|
if constexpr (_check_overflow)
|
|
{
|
|
bool overflow = false;
|
|
|
|
if constexpr (sizeof(A) > sizeof(CompareInt))
|
|
overflow |= (A(x) != a);
|
|
if constexpr (sizeof(B) > sizeof(CompareInt))
|
|
overflow |= (B(y) != b);
|
|
if constexpr (std::is_unsigned_v<A>)
|
|
overflow |= (x < 0);
|
|
if constexpr (std::is_unsigned_v<B>)
|
|
overflow |= (y < 0);
|
|
|
|
if constexpr (scale_left)
|
|
overflow |= common::mulOverflow(x, scale, x);
|
|
if constexpr (scale_right)
|
|
overflow |= common::mulOverflow(y, scale, y);
|
|
|
|
if (overflow)
|
|
throw Exception("Can't compare", ErrorCodes::DECIMAL_OVERFLOW);
|
|
}
|
|
else
|
|
{
|
|
if constexpr (scale_left)
|
|
x *= scale;
|
|
if constexpr (scale_right)
|
|
y *= scale;
|
|
}
|
|
|
|
return Op::apply(x, y);
|
|
}
|
|
|
|
template <bool scale_left, bool scale_right>
|
|
static void NO_INLINE vector_vector(const ArrayA & a, const ArrayB & b, PaddedPODArray<UInt8> & c,
|
|
CompareInt scale)
|
|
{
|
|
size_t size = a.size();
|
|
const A * a_pos = a.data();
|
|
const B * b_pos = b.data();
|
|
UInt8 * c_pos = c.data();
|
|
const A * a_end = a_pos + size;
|
|
|
|
while (a_pos < a_end)
|
|
{
|
|
*c_pos = apply<scale_left, scale_right>(*a_pos, *b_pos, scale);
|
|
++a_pos;
|
|
++b_pos;
|
|
++c_pos;
|
|
}
|
|
}
|
|
|
|
template <bool scale_left, bool scale_right>
|
|
static void NO_INLINE vector_constant(const ArrayA & a, B b, PaddedPODArray<UInt8> & c, CompareInt scale)
|
|
{
|
|
size_t size = a.size();
|
|
const A * a_pos = a.data();
|
|
UInt8 * c_pos = c.data();
|
|
const A * a_end = a_pos + size;
|
|
|
|
while (a_pos < a_end)
|
|
{
|
|
*c_pos = apply<scale_left, scale_right>(*a_pos, b, scale);
|
|
++a_pos;
|
|
++c_pos;
|
|
}
|
|
}
|
|
|
|
template <bool scale_left, bool scale_right>
|
|
static void NO_INLINE constant_vector(A a, const ArrayB & b, PaddedPODArray<UInt8> & c, CompareInt scale)
|
|
{
|
|
size_t size = b.size();
|
|
const B * b_pos = b.data();
|
|
UInt8 * c_pos = c.data();
|
|
const B * b_end = b_pos + size;
|
|
|
|
while (b_pos < b_end)
|
|
{
|
|
*c_pos = apply<scale_left, scale_right>(a, *b_pos, scale);
|
|
++b_pos;
|
|
++c_pos;
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|