mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-11 18:14:03 +00:00
497 lines
16 KiB
C++
497 lines
16 KiB
C++
#pragma once
|
||
|
||
#include <DB/DataTypes/DataTypeArray.h>
|
||
#include <DB/DataTypes/DataTypesNumberFixed.h>
|
||
|
||
#include <DB/Columns/ColumnArray.h>
|
||
#include <DB/Columns/ColumnString.h>
|
||
|
||
#include <DB/Functions/IFunction.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
/** Функции по работе с массивами:
|
||
*
|
||
* array(с1, с2, ...) - создать массив из констант.
|
||
* arrayElement(arr, i) - получить элемент массива.
|
||
* has(arr, x) - есть ли в массиве элемент x.
|
||
* indexOf(arr, x) - возвращает индекс элемента x (начиная с 1), если он есть в массиве, или 0, если его нет.
|
||
*/
|
||
|
||
class FunctionArray : public IFunction
|
||
{
|
||
public:
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return "array";
|
||
}
|
||
|
||
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.empty())
|
||
throw Exception("Function array requires at least one argument.", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
for (size_t i = 1, size = arguments.size(); i < size; ++i)
|
||
if (arguments[i]->getName() != arguments[0]->getName())
|
||
throw Exception("Arguments for function array must have same type.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return new DataTypeArray(arguments[0]);
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
/// Все аргументы должны быть константами.
|
||
for (size_t i = 0, size = arguments.size(); i < size; ++i)
|
||
if (!block.getByPosition(arguments[i]).column->isConst())
|
||
throw Exception("Arguments for function array must be constant.", ErrorCodes::ILLEGAL_COLUMN);;
|
||
|
||
Array arr;
|
||
for (size_t i = 0, size = arguments.size(); i < size; ++i)
|
||
arr.push_back((*block.getByPosition(arguments[i]).column)[0]);
|
||
|
||
block.getByPosition(result).column = new ColumnConstArray(block.getByPosition(arguments[0]).column->size(), arr, new DataTypeArray(block.getByPosition(arguments[0]).type));
|
||
}
|
||
};
|
||
|
||
|
||
template <typename T>
|
||
struct ArrayElementNumImpl
|
||
{
|
||
static void vector(
|
||
const std::vector<T> & data, const ColumnArray::Offsets_t & offsets,
|
||
const ColumnArray::Offset_t index, /// Передаётся индекс начиная с нуля, а не с единицы.
|
||
std::vector<T> & result)
|
||
{
|
||
size_t size = offsets.size();
|
||
result.resize(size);
|
||
|
||
ColumnArray::Offset_t current_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
size_t array_size = offsets[i] - current_offset;
|
||
|
||
if (index < array_size)
|
||
result[i] = data[current_offset + index];
|
||
/// Иначе - ничего не делаем (оставим значение по-умолчанию, которое уже лежит в векторе).
|
||
|
||
current_offset = offsets[i];
|
||
}
|
||
}
|
||
};
|
||
|
||
struct ArrayElementStringImpl
|
||
{
|
||
static void vector(
|
||
const std::vector<UInt8> & data, const ColumnArray::Offsets_t & offsets, const ColumnString::Offsets_t & string_offsets,
|
||
const ColumnArray::Offset_t index, /// Передаётся индекс начиная с нуля, а не с единицы.
|
||
std::vector<UInt8> & result_data, ColumnArray::Offsets_t & result_offsets)
|
||
{
|
||
size_t size = offsets.size();
|
||
result_offsets.resize(size);
|
||
result_data.reserve(data.size());
|
||
|
||
ColumnArray::Offset_t current_offset = 0;
|
||
ColumnArray::Offset_t current_result_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
size_t array_size = offsets[i] - current_offset;
|
||
|
||
if (index < array_size)
|
||
{
|
||
ColumnArray::Offset_t string_pos = current_offset == 0 && index == 0
|
||
? 0
|
||
: string_offsets[current_offset + index - 1];
|
||
|
||
ColumnArray::Offset_t string_size = string_offsets[current_offset + index] - string_pos;
|
||
|
||
result_data.resize(current_result_offset + string_size);
|
||
memcpy(&result_data[current_result_offset], &data[string_pos], string_size);
|
||
current_result_offset += string_size;
|
||
result_offsets[i] = current_result_offset;
|
||
}
|
||
else
|
||
{
|
||
/// Вставим пустую строку.
|
||
result_data.resize(current_result_offset + 1);
|
||
current_result_offset += 1;
|
||
result_offsets[i] = current_result_offset;
|
||
}
|
||
|
||
current_offset = offsets[i];
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
class FunctionArrayElement : public IFunction
|
||
{
|
||
private:
|
||
template <typename T>
|
||
bool executeNumber(Block & block, const ColumnNumbers & arguments, size_t result, UInt64 index)
|
||
{
|
||
const ColumnArray * col_array = dynamic_cast<const ColumnArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const ColumnVector<T> * col_nested = dynamic_cast<const ColumnVector<T> *>(&col_array->getData());
|
||
|
||
if (!col_nested)
|
||
return false;
|
||
|
||
ColumnVector<T> * col_res = new ColumnVector<T>;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
ArrayElementNumImpl<T>::vector(col_nested->getData(), col_array->getOffsets(), index, col_res->getData());
|
||
|
||
return true;
|
||
}
|
||
|
||
bool executeString(Block & block, const ColumnNumbers & arguments, size_t result, UInt64 index)
|
||
{
|
||
const ColumnArray * col_array = dynamic_cast<const ColumnArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const ColumnString * col_nested = dynamic_cast<const ColumnString *>(&col_array->getData());
|
||
|
||
if (!col_nested)
|
||
return false;
|
||
|
||
ColumnString * col_res = new ColumnString;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
ArrayElementStringImpl::vector(
|
||
col_nested->getChars(),
|
||
col_array->getOffsets(),
|
||
col_nested->getOffsets(),
|
||
index,
|
||
col_res->getChars(),
|
||
col_res->getOffsets());
|
||
|
||
return true;
|
||
}
|
||
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result, UInt64 index)
|
||
{
|
||
const ColumnConstArray * col_array = dynamic_cast<const ColumnConstArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
Field value = col_array->getData().at(index);
|
||
|
||
block.getByPosition(result).column = block.getByPosition(result).type->createConstColumn(
|
||
block.getByPosition(0).column->size(),
|
||
value);
|
||
|
||
return true;
|
||
}
|
||
|
||
public:
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return "arrayElement";
|
||
}
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 2)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ Poco::NumberFormatter::format(arguments.size()) + ", should be 2.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
const DataTypeArray * array_type = dynamic_cast<const DataTypeArray *>(&*arguments[0]);
|
||
if (!array_type)
|
||
throw Exception("First argument for function " + getName() + " must be array.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
if (!arguments[1]->isNumeric() || 0 != arguments[1]->getName().compare(0, 4, "UInt"))
|
||
throw Exception("Second argument for function " + getName() + " must have UInt type.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return array_type->getNestedType();
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
if (!block.getByPosition(arguments[1]).column->isConst())
|
||
throw Exception("Second argument for function " + getName() + " must be constant.", ErrorCodes::ILLEGAL_COLUMN);
|
||
|
||
UInt64 index = safeGet<UInt64>((*block.getByPosition(arguments[1]).column)[0]);
|
||
|
||
if (index == 0)
|
||
throw Exception("Array indices is 1-based", ErrorCodes::ZERO_ARRAY_OR_TUPLE_INDEX);
|
||
index -= 1;
|
||
|
||
if (!( executeNumber<UInt8> (block, arguments, result, index)
|
||
|| executeNumber<UInt16> (block, arguments, result, index)
|
||
|| executeNumber<UInt32> (block, arguments, result, index)
|
||
|| executeNumber<UInt64> (block, arguments, result, index)
|
||
|| executeNumber<Int8> (block, arguments, result, index)
|
||
|| executeNumber<Int16> (block, arguments, result, index)
|
||
|| executeNumber<Int32> (block, arguments, result, index)
|
||
|| executeNumber<Int64> (block, arguments, result, index)
|
||
|| executeNumber<Float32> (block, arguments, result, index)
|
||
|| executeNumber<Float64> (block, arguments, result, index)
|
||
|| executeConst (block, arguments, result, index)
|
||
|| executeString (block, arguments, result, index)))
|
||
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of first argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
};
|
||
|
||
|
||
/// Для has.
|
||
struct IndexToOne
|
||
{
|
||
typedef UInt8 ResultType;
|
||
static inline bool apply(size_t j, ResultType & current) { current = 1; return false; }
|
||
};
|
||
|
||
/// Для indexOf.
|
||
struct IndexIdentity
|
||
{
|
||
typedef UInt64 ResultType;
|
||
/// Индекс возвращается начиная с единицы.
|
||
static inline bool apply(size_t j, ResultType & current) { current = j + 1; return false; }
|
||
};
|
||
|
||
/// Для countEqual.
|
||
struct IndexCount
|
||
{
|
||
typedef UInt32 ResultType;
|
||
static inline bool apply(size_t j, ResultType & current) { ++current; return true; }
|
||
};
|
||
|
||
|
||
template <typename T, typename IndexConv>
|
||
struct ArrayIndexNumImpl
|
||
{
|
||
static void vector(
|
||
const std::vector<T> & data, const ColumnArray::Offsets_t & offsets,
|
||
const T value,
|
||
std::vector<typename IndexConv::ResultType> & result)
|
||
{
|
||
size_t size = offsets.size();
|
||
result.resize(size);
|
||
|
||
ColumnArray::Offset_t current_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
size_t array_size = offsets[i] - current_offset;
|
||
typename IndexConv::ResultType current = 0;
|
||
|
||
for (size_t j = 0; j < array_size; ++j)
|
||
{
|
||
if (data[current_offset + j] == value)
|
||
{
|
||
if (!IndexConv::apply(j, current))
|
||
break;
|
||
}
|
||
}
|
||
|
||
result[i] = current;
|
||
current_offset = offsets[i];
|
||
}
|
||
}
|
||
};
|
||
|
||
template <typename IndexConv>
|
||
struct ArrayIndexStringImpl
|
||
{
|
||
static void vector(
|
||
const std::vector<UInt8> & data, const ColumnArray::Offsets_t & offsets, const ColumnString::Offsets_t & string_offsets,
|
||
const String & value,
|
||
std::vector<typename IndexConv::ResultType> & result)
|
||
{
|
||
size_t size = offsets.size();
|
||
size_t value_size = value.size();
|
||
result.resize(size);
|
||
|
||
ColumnArray::Offset_t current_offset = 0;
|
||
for (size_t i = 0; i < size; ++i)
|
||
{
|
||
size_t array_size = offsets[i] - current_offset;
|
||
typename IndexConv::ResultType current = 0;
|
||
|
||
for (size_t j = 0; j < array_size; ++j)
|
||
{
|
||
ColumnArray::Offset_t string_pos = current_offset == 0 && j == 0
|
||
? 0
|
||
: string_offsets[current_offset + j - 1];
|
||
|
||
ColumnArray::Offset_t string_size = string_offsets[current_offset + j] - string_pos;
|
||
|
||
if (string_size == value_size + 1 && 0 == memcmp(value.data(), &data[string_pos], value_size))
|
||
{
|
||
if (!IndexConv::apply(j, current))
|
||
break;
|
||
}
|
||
}
|
||
|
||
result[i] = current;
|
||
current_offset = offsets[i];
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
template <typename IndexConv, typename Name>
|
||
class FunctionArrayIndex : public IFunction
|
||
{
|
||
private:
|
||
typedef ColumnVector<typename IndexConv::ResultType> ResultColumnType;
|
||
|
||
template <typename T>
|
||
bool executeNumber(Block & block, const ColumnNumbers & arguments, size_t result, const Field & value)
|
||
{
|
||
const ColumnArray * col_array = dynamic_cast<const ColumnArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const ColumnVector<T> * col_nested = dynamic_cast<const ColumnVector<T> *>(&col_array->getData());
|
||
|
||
if (!col_nested)
|
||
return false;
|
||
|
||
ResultColumnType * col_res = new ResultColumnType;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
ArrayIndexNumImpl<T, IndexConv>::vector(
|
||
col_nested->getData(),
|
||
col_array->getOffsets(),
|
||
safeGet<typename NearestFieldType<T>::Type>(value),
|
||
col_res->getData());
|
||
|
||
return true;
|
||
}
|
||
|
||
bool executeString(Block & block, const ColumnNumbers & arguments, size_t result, const Field & value)
|
||
{
|
||
const ColumnArray * col_array = dynamic_cast<const ColumnArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const ColumnString * col_nested = dynamic_cast<const ColumnString *>(&col_array->getData());
|
||
|
||
if (!col_nested)
|
||
return false;
|
||
|
||
ResultColumnType * col_res = new ResultColumnType;
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
ArrayIndexStringImpl<IndexConv>::vector(
|
||
col_nested->getChars(),
|
||
col_array->getOffsets(),
|
||
col_nested->getOffsets(),
|
||
safeGet<const String &>(value),
|
||
col_res->getData());
|
||
|
||
return true;
|
||
}
|
||
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & value)
|
||
{
|
||
const ColumnConstArray * col_array = dynamic_cast<const ColumnConstArray *>(&*block.getByPosition(arguments[0]).column);
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const Array & arr = col_array->getData();
|
||
|
||
size_t i = 0;
|
||
size_t size = arr.size();
|
||
typename IndexConv::ResultType current = 0;
|
||
|
||
for (; i < size; ++i)
|
||
{
|
||
if (arr[i] == value)
|
||
{
|
||
if (!IndexConv::apply(i, current))
|
||
break;
|
||
}
|
||
}
|
||
|
||
block.getByPosition(result).column = block.getByPosition(result).type->createConstColumn(
|
||
block.getByPosition(0).column->size(),
|
||
static_cast<typename NearestFieldType<typename IndexConv::ResultType>::Type>(current));
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
public:
|
||
/// Получить имя функции.
|
||
String getName() const
|
||
{
|
||
return Name::get();
|
||
}
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnType(const DataTypes & arguments) const
|
||
{
|
||
if (arguments.size() != 2)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ Poco::NumberFormatter::format(arguments.size()) + ", should be 2.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
const DataTypeArray * array_type = dynamic_cast<const DataTypeArray *>(&*arguments[0]);
|
||
if (!array_type)
|
||
throw Exception("First argument for function " + getName() + " must be array.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
if (array_type->getNestedType()->getName() != arguments[1]->getName())
|
||
throw Exception("Type of array elements and second argument for function " + getName() + " must be same."
|
||
" Passed: " + arguments[0]->getName() + " and " + arguments[1]->getName() + ".", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return new typename DataTypeFromFieldType<typename IndexConv::ResultType>::Type;
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
|
||
{
|
||
if (!block.getByPosition(arguments[1]).column->isConst())
|
||
throw Exception("Second argument for function " + getName() + " must be constant.", ErrorCodes::ILLEGAL_COLUMN);
|
||
|
||
Field value = (*block.getByPosition(arguments[1]).column)[0];
|
||
|
||
if (!( executeNumber<UInt8> (block, arguments, result, value)
|
||
|| executeNumber<UInt16> (block, arguments, result, value)
|
||
|| executeNumber<UInt32> (block, arguments, result, value)
|
||
|| executeNumber<UInt64> (block, arguments, result, value)
|
||
|| executeNumber<Int8> (block, arguments, result, value)
|
||
|| executeNumber<Int16> (block, arguments, result, value)
|
||
|| executeNumber<Int32> (block, arguments, result, value)
|
||
|| executeNumber<Int64> (block, arguments, result, value)
|
||
|| executeNumber<Float32> (block, arguments, result, value)
|
||
|| executeNumber<Float64> (block, arguments, result, value)
|
||
|| executeConst (block, arguments, result, value)
|
||
|| executeString (block, arguments, result, value)))
|
||
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of first argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
};
|
||
|
||
|
||
struct NameHas { static const char * get() { return "has"; } };
|
||
struct NameIndexOf { static const char * get() { return "indexOf"; } };
|
||
struct NameCountEqual { static const char * get() { return "countEqual"; } };
|
||
|
||
typedef FunctionArrayIndex<IndexToOne, NameHas> FunctionHas;
|
||
typedef FunctionArrayIndex<IndexIdentity, NameIndexOf> FunctionIndexOf;
|
||
typedef FunctionArrayIndex<IndexCount, NameCountEqual> FunctionCountEqual;
|
||
|
||
|
||
}
|