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#pragma once
#include "IArraySink.h"
#include <Columns/ColumnVector.h>
#include <Columns/ColumnDecimal.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnString.h>
#include <Columns/ColumnFixedString.h>
#include <Columns/ColumnConst.h>
#include <Columns/ColumnNullable.h>
#include <Common/typeid_cast.h>
#include <Common/assert_cast.h>
namespace DB::GatherUtils
{
template <typename T>
struct NumericArraySource;
struct GenericArraySource;
template <typename ArraySource>
struct NullableArraySource;
template <typename T>
struct NumericValueSource;
struct GenericValueSource;
template <typename ArraySource>
struct NullableValueSource;
template <typename T>
struct NumericArraySink : public ArraySinkImpl<NumericArraySink<T>>
{
using ColVecType = ColumnVectorOrDecimal<T>;
using CompatibleArraySource = NumericArraySource<T>;
using CompatibleValueSource = NumericValueSource<T>;
typename ColVecType::Container & elements;
typename ColumnArray::Offsets & offsets;
size_t row_num = 0;
ColumnArray::Offset current_offset = 0;
NumericArraySink(IColumn & elements_, ColumnArray::Offsets & offsets_, size_t column_size)
: elements(assert_cast<ColVecType&>(elements_).getData()), offsets(offsets_)
{
offsets.resize(column_size);
}
void next()
{
offsets[row_num] = current_offset;
++row_num;
}
bool isEnd() const
{
return row_num == offsets.size();
}
size_t rowNum() const
{
return row_num;
}
void reserve(size_t num_elements)
{
elements.reserve(num_elements);
}
};
struct StringSink
{
typename ColumnString::Chars & elements;
typename ColumnString::Offsets & offsets;
size_t row_num = 0;
ColumnString::Offset current_offset = 0;
StringSink(ColumnString & col, size_t column_size)
: elements(col.getChars()), offsets(col.getOffsets())
{
offsets.resize(column_size);
}
void ALWAYS_INLINE next()
{
elements.push_back(0);
++current_offset;
offsets[row_num] = current_offset;
++row_num;
}
bool isEnd() const
{
return row_num == offsets.size();
}
size_t rowNum() const
{
return row_num;
}
void reserve(size_t num_elements)
{
elements.reserve(num_elements);
}
};
struct FixedStringSink
{
typename ColumnString::Chars & elements;
size_t string_size;
size_t row_num = 0;
size_t total_rows;
ColumnString::Offset current_offset = 0;
FixedStringSink(ColumnFixedString & col, size_t column_size)
: elements(col.getChars()), string_size(col.getN()), total_rows(column_size)
{
elements.resize(column_size * string_size);
}
void next()
{
current_offset += string_size;
++row_num;
}
bool isEnd() const
{
return row_num == total_rows;
}
size_t rowNum() const
{
return row_num;
}
void reserve(size_t num_elements)
{
elements.reserve(num_elements);
}
};
struct GenericArraySink : public ArraySinkImpl<GenericArraySink>
{
using CompatibleArraySource = GenericArraySource;
using CompatibleValueSource = GenericValueSource;
IColumn & elements;
ColumnArray::Offsets & offsets;
size_t row_num = 0;
ColumnArray::Offset current_offset = 0;
GenericArraySink(IColumn & elements_, ColumnArray::Offsets & offsets_, size_t column_size)
: elements(elements_), offsets(offsets_)
{
offsets.resize(column_size);
}
void next()
{
offsets[row_num] = current_offset;
++row_num;
}
bool isEnd() const
{
return row_num == offsets.size();
}
size_t rowNum() const
{
return row_num;
}
void reserve(size_t num_elements)
{
elements.reserve(num_elements);
}
};
template <typename ArraySink>
struct NullableArraySink : public ArraySink
{
using CompatibleArraySource = NullableArraySource<typename ArraySink::CompatibleArraySource>;
using CompatibleValueSource = NullableValueSource<typename ArraySink::CompatibleValueSource>;
NullMap & null_map;
NullableArraySink(IColumn & elements_, ColumnArray::Offsets & offsets_, size_t column_size)
: ArraySink(assert_cast<ColumnNullable &>(elements_).getNestedColumn(), offsets_, column_size)
, null_map(assert_cast<ColumnNullable &>(elements_).getNullMapData())
{
}
void accept(ArraySinkVisitor & visitor) override { visitor.visit(*this); }
void reserve(size_t num_elements)
{
ArraySink::reserve(num_elements);
null_map.reserve(num_elements);
}
};
}
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