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ClickHouse/src/Functions/mortonDecode.cpp

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#include <Functions/IFunction.h>
#include <Functions/FunctionFactory.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeTuple.h>
#include <Columns/ColumnsNumber.h>
#include <Functions/FunctionHelpers.h>
#include <Columns/ColumnTuple.h>
#include <Functions/PerformanceAdaptors.h>
#include <morton-nd/mortonND_LUT.h>
#if USE_MULTITARGET_CODE && defined(__BMI2__)
#include <morton-nd/mortonND_BMI2.h>
#endif
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int ILLEGAL_COLUMN;
extern const int ARGUMENT_OUT_OF_BOUND;
}
#define EXTRACT_VECTOR(INDEX) \
auto col##INDEX = ColumnUInt64::create(); \
auto & vec##INDEX = col##INDEX->getData(); \
vec##INDEX.resize(input_rows_count);
#define DECODE(ND, ...) \
if (nd == (ND)) \
{ \
for (size_t i = 0; i < input_rows_count; i++) \
{ \
auto res = MortonND_##ND##D_Dec.Decode(col_code->getUInt(i)); \
__VA_ARGS__ \
} \
}
#define MASK(IDX, ...) \
((mask) ? shrink(mask->getColumn((IDX)).getUInt(0), std::get<IDX>(__VA_ARGS__)) : std::get<IDX>(__VA_ARGS__))
#define EXECUTE() \
size_t nd; \
const auto * col_const = typeid_cast<const ColumnConst *>(arguments[0].column.get()); \
const auto * mask = typeid_cast<const ColumnTuple *>(col_const->getDataColumnPtr().get()); \
if (mask) \
nd = mask->tupleSize(); \
else \
nd = col_const->getUInt(0); \
auto non_const_arguments = arguments; \
non_const_arguments[1].column = non_const_arguments[1].column->convertToFullColumnIfConst(); \
const ColumnPtr & col_code = non_const_arguments[1].column; \
Columns tuple_columns(nd); \
EXTRACT_VECTOR(0) \
if (nd == 1) \
{ \
if (mask) \
{ \
for (size_t i = 0; i < input_rows_count; i++) \
{ \
vec0[i] = shrink(mask->getColumn(0).getUInt(0), col_code->getUInt(i)); \
} \
tuple_columns[0] = std::move(col0); \
} \
else \
{ \
for (size_t i = 0; i < input_rows_count; i++) \
{ \
vec0[i] = col_code->getUInt(i); \
} \
tuple_columns[0] = std::move(col0); \
} \
return ColumnTuple::create(tuple_columns); \
} \
EXTRACT_VECTOR(1) \
DECODE(2, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res);) \
EXTRACT_VECTOR(2) \
DECODE(3, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res);) \
EXTRACT_VECTOR(3) \
DECODE(4, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res); \
vec3[i] = MASK(3, res);) \
EXTRACT_VECTOR(4) \
DECODE(5, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res); \
vec3[i] = MASK(3, res); \
vec4[i] = MASK(4, res);) \
EXTRACT_VECTOR(5) \
DECODE(6, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res); \
vec3[i] = MASK(3, res); \
vec4[i] = MASK(4, res); \
vec5[i] = MASK(5, res);) \
EXTRACT_VECTOR(6) \
DECODE(7, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res); \
vec3[i] = MASK(3, res); \
vec4[i] = MASK(4, res); \
vec5[i] = MASK(5, res); \
vec6[i] = MASK(6, res);) \
EXTRACT_VECTOR(7) \
DECODE(8, \
vec0[i] = MASK(0, res); \
vec1[i] = MASK(1, res); \
vec2[i] = MASK(2, res); \
vec3[i] = MASK(3, res); \
vec4[i] = MASK(4, res); \
vec5[i] = MASK(5, res); \
vec6[i] = MASK(6, res); \
vec7[i] = MASK(7, res);) \
switch (nd) \
{ \
case 2: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
break; \
case 3: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
return ColumnTuple::create(tuple_columns); \
case 4: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
tuple_columns[3] = std::move(col3); \
return ColumnTuple::create(tuple_columns); \
case 5: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
tuple_columns[3] = std::move(col3); \
tuple_columns[4] = std::move(col4); \
return ColumnTuple::create(tuple_columns); \
case 6: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
tuple_columns[3] = std::move(col3); \
tuple_columns[4] = std::move(col4); \
tuple_columns[5] = std::move(col5); \
return ColumnTuple::create(tuple_columns); \
case 7: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
tuple_columns[3] = std::move(col3); \
tuple_columns[4] = std::move(col4); \
tuple_columns[5] = std::move(col5); \
tuple_columns[6] = std::move(col6); \
return ColumnTuple::create(tuple_columns); \
case 8: \
tuple_columns[0] = std::move(col0); \
tuple_columns[1] = std::move(col1); \
tuple_columns[2] = std::move(col2); \
tuple_columns[3] = std::move(col3); \
tuple_columns[4] = std::move(col4); \
tuple_columns[5] = std::move(col5); \
tuple_columns[6] = std::move(col6); \
tuple_columns[7] = std::move(col7); \
return ColumnTuple::create(tuple_columns); \
} \
return ColumnTuple::create(tuple_columns);
DECLARE_DEFAULT_CODE(
constexpr auto MortonND_2D_Dec = mortonnd::MortonNDLutDecoder<2, 32, 8>();
constexpr auto MortonND_3D_Dec = mortonnd::MortonNDLutDecoder<3, 21, 8>();
constexpr auto MortonND_4D_Dec = mortonnd::MortonNDLutDecoder<4, 16, 8>();
constexpr auto MortonND_5D_Dec = mortonnd::MortonNDLutDecoder<5, 12, 8>();
constexpr auto MortonND_6D_Dec = mortonnd::MortonNDLutDecoder<6, 10, 8>();
constexpr auto MortonND_7D_Dec = mortonnd::MortonNDLutDecoder<7, 9, 8>();
constexpr auto MortonND_8D_Dec = mortonnd::MortonNDLutDecoder<8, 8, 8>();
class FunctionMortonDecode : public IFunction
{
public:
static constexpr auto name = "mortonDecode";
static FunctionPtr create(ContextPtr)
{
return std::make_shared<FunctionMortonDecode>();
}
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 2;
}
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {0}; }
DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
{
UInt64 tuple_size = 0;
const auto * col_const = typeid_cast<const ColumnConst *>(arguments[0].column.get());
if (!col_const)
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
"Illegal column type {} of function {}, should be a constant (UInt or Tuple)",
arguments[0].type->getName(), getName());
if (!WhichDataType(arguments[1].type).isNativeUInt())
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
"Illegal column type {} of function {}, should be a native UInt",
arguments[1].type->getName(), getName());
const auto * mask = typeid_cast<const ColumnTuple *>(col_const->getDataColumnPtr().get());
if (mask)
{
tuple_size = mask->tupleSize();
}
else if (WhichDataType(arguments[0].type).isNativeUInt())
{
tuple_size = col_const->getUInt(0);
}
else
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
"Illegal column type {} of function {}, should be UInt or Tuple",
arguments[0].type->getName(), getName());
if (tuple_size > 8 || tuple_size < 1)
throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND,
"Illegal first argument for function {}, should be a number in range 1-8 or a Tuple of such size",
getName());
if (mask)
{
const auto * type_tuple = typeid_cast<const DataTypeTuple *>(arguments[0].type.get());
for (size_t i = 0; i < tuple_size; i++)
{
if (!WhichDataType(type_tuple->getElement(i)).isNativeUInt())
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
"Illegal type {} of argument in tuple for function {}, should be a native UInt",
type_tuple->getElement(i)->getName(), getName());
auto ratio = mask->getColumn(i).getUInt(0);
if (ratio > 8 || ratio < 1)
throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND,
"Illegal argument {} in tuple for function {}, should be a number in range 1-8",
ratio, getName());
}
}
DataTypes types(tuple_size);
for (size_t i = 0; i < tuple_size; i++)
{
types[i] = std::make_shared<DataTypeUInt64>();
}
return std::make_shared<DataTypeTuple>(types);
}
static UInt64 shrink(UInt64 ratio, UInt64 value)
{
switch (ratio)
{
case 1:
return value;
case 2:
return std::get<1>(MortonND_2D_Dec.Decode(value));
case 3:
return std::get<2>(MortonND_3D_Dec.Decode(value));
case 4:
return std::get<3>(MortonND_4D_Dec.Decode(value));
case 5:
return std::get<4>(MortonND_5D_Dec.Decode(value));
case 6:
return std::get<5>(MortonND_6D_Dec.Decode(value));
case 7:
return std::get<6>(MortonND_7D_Dec.Decode(value));
case 8:
return std::get<7>(MortonND_8D_Dec.Decode(value));
}
return value;
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
EXECUTE()
}
};
) // DECLARE_DEFAULT_CODE
#if defined(MORTON_ND_BMI2_ENABLED)
#undef DECODE
#define DECODE(ND, ...) \
if (nd == (ND)) \
{ \
for (size_t i = 0; i < input_rows_count; i++) \
{ \
auto res = MortonND_##ND##D::Decode(col_code->getUInt(i)); \
__VA_ARGS__ \
} \
}
DECLARE_AVX2_SPECIFIC_CODE(
using MortonND_2D = mortonnd::MortonNDBmi<2, uint64_t>;
using MortonND_3D = mortonnd::MortonNDBmi<3, uint64_t>;
using MortonND_4D = mortonnd::MortonNDBmi<4, uint64_t>;
using MortonND_5D = mortonnd::MortonNDBmi<5, uint64_t>;
using MortonND_6D = mortonnd::MortonNDBmi<6, uint64_t>;
using MortonND_7D = mortonnd::MortonNDBmi<7, uint64_t>;
using MortonND_8D = mortonnd::MortonNDBmi<8, uint64_t>;
class FunctionMortonDecode: public TargetSpecific::Default::FunctionMortonDecode
{
static UInt64 shrink(UInt64 ratio, UInt64 value)
{
switch (ratio)
{
case 1:
return value;
case 2:
return std::get<1>(MortonND_2D::Decode(value));
case 3:
return std::get<2>(MortonND_3D::Decode(value));
case 4:
return std::get<3>(MortonND_4D::Decode(value));
case 5:
return std::get<4>(MortonND_5D::Decode(value));
case 6:
return std::get<5>(MortonND_6D::Decode(value));
case 7:
return std::get<6>(MortonND_7D::Decode(value));
case 8:
return std::get<7>(MortonND_8D::Decode(value));
}
return value;
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
EXECUTE()
}
};
)
#endif // MORTON_ND_BMI2_ENABLED
#undef DECODE
#undef MASK
#undef EXTRACT_VECTOR
#undef EXECUTE
class FunctionMortonDecode: public TargetSpecific::Default::FunctionMortonDecode
{
public:
explicit FunctionMortonDecode(ContextPtr context) : selector(context)
{
selector.registerImplementation<TargetArch::Default,
TargetSpecific::Default::FunctionMortonDecode>();
#if USE_MULTITARGET_CODE && defined(MORTON_ND_BMI2_ENABLED)
selector.registerImplementation<TargetArch::AVX2,
TargetSpecific::AVX2::FunctionMortonDecode>();
#endif
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override
{
return selector.selectAndExecute(arguments, result_type, input_rows_count);
}
static FunctionPtr create(ContextPtr context)
{
return std::make_shared<FunctionMortonDecode>(context);
}
private:
ImplementationSelector<IFunction> selector;
};
REGISTER_FUNCTION(MortonDecode)
{
factory.registerFunction<FunctionMortonDecode>(FunctionDocumentation{
.description=R"(
Decodes a Morton encoding (ZCurve) into the corresponding unsigned integer tuple
The function has two modes of operation:
- Simple
- Expanded
Simple: accepts a resulting tuple size as a first argument and the code as a second argument.
[example:simple]
Will decode into: `(1,2,3,4)`
The resulting tuple size cannot be more than 8
Expanded: accepts a range mask (tuple) as a first argument and the code as a second argument.
Each number in mask configures the amount of range shrink
1 - no shrink
2 - 2x shrink
3 - 3x shrink
....
Up to 8x shrink.
[example:range_shrank]
Note: see mortonEncode() docs on why range change might be beneficial.
Still limited to 8 numbers at most.
Morton code for one argument is always the argument itself (as a tuple).
[example:identity]
Produces: `(1)`
You can shrink one argument too:
[example:identity_shrank]
Produces: `(128)`
The function accepts a column of codes as a second argument:
[example:from_table]
The range tuple must be a constant:
[example:from_table_range]
)",
.examples{
{"simple", "SELECT mortonDecode(4, 2149)", ""},
{"range_shrank", "SELECT mortonDecode((1,2), 1572864)", ""},
{"identity", "SELECT mortonDecode(1, 1)", ""},
{"identity_shrank", "SELECT mortonDecode(tuple(2), 32768)", ""},
{"from_table", "SELECT mortonDecode(2, code) FROM table", ""},
{"from_table_range", "SELECT mortonDecode((1,2), code) FROM table", ""},
},
.categories {"ZCurve", "Morton coding"}
});
}
}
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