mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-14 03:25:15 +00:00
124 lines
2.5 KiB
C++
124 lines
2.5 KiB
C++
#ifndef DBMS_CORE_COLUMN_TUPLE_H
|
||
#define DBMS_CORE_COLUMN_TUPLE_H
|
||
|
||
#include <vector>
|
||
|
||
#include <Poco/SharedPtr.h>
|
||
|
||
#include <DB/Core/Exception.h>
|
||
#include <DB/Core/ErrorCodes.h>
|
||
#include <DB/Column/IColumn.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
using Poco::SharedPtr;
|
||
|
||
/** Столбец со значениями-кортежами.
|
||
*/
|
||
class ColumnTuple : public IColumn
|
||
{
|
||
private:
|
||
typedef std::vector<SharedPtr<IColumn> > Container_t;
|
||
Container_t data;
|
||
|
||
/// убедиться в том, что размеры столбцов-элементов совпадают.
|
||
void checkSizes() const
|
||
{
|
||
if (data.empty())
|
||
throw Exception("Empty tuple", ErrorCodes::EMPTY_TUPLE);
|
||
|
||
size_t size = data[0]->size();
|
||
for (size_t i = 1; i < data.size(); ++i)
|
||
if (data[i]->size() != size)
|
||
throw Exception("Sizes of columns (elements of tuple column) doesn't match",
|
||
ErrorCodes::SIZES_OF_COLUMNS_IN_TUPLE_DOESNT_MATCH);
|
||
}
|
||
|
||
public:
|
||
ColumnTuple(const Container_t & data_)
|
||
: data(data_)
|
||
{
|
||
checkSizes();
|
||
}
|
||
|
||
SharedPtr<IColumn> cloneEmpty() const
|
||
{
|
||
Container_t new_data(data.size());
|
||
for (size_t i = 0; i < data.size(); ++i)
|
||
new_data[i] = data[i]->cloneEmpty();
|
||
|
||
return new ColumnTuple(new_data);
|
||
}
|
||
|
||
size_t size() const
|
||
{
|
||
return data[0]->size();
|
||
}
|
||
|
||
Field operator[](size_t n) const
|
||
{
|
||
Array res = Array(data.size());
|
||
for (size_t i = 0; i < data.size(); ++i)
|
||
res[i] = (*data[i])[n];
|
||
return res;
|
||
}
|
||
|
||
void cut(size_t start, size_t length)
|
||
{
|
||
for (size_t i = 0; i < data.size(); ++i)
|
||
data[i]->cut(start, length);
|
||
}
|
||
|
||
void insert(const Field & x)
|
||
{
|
||
Array & arr = boost::get<Array &>(x);
|
||
if (arr.size() != data.size())
|
||
throw Exception("Sizes of columns in tuple doesn't match", ErrorCodes::SIZES_OF_COLUMNS_IN_TUPLE_DOESNT_MATCH);
|
||
|
||
for (size_t i = 0; i < data.size(); ++i)
|
||
data[i]->insert(arr[i]);
|
||
}
|
||
|
||
void insertDefault()
|
||
{
|
||
for (size_t i = 0; i < data.size(); ++i)
|
||
data[i]->insertDefault();
|
||
}
|
||
|
||
void clear()
|
||
{
|
||
data.clear();
|
||
}
|
||
|
||
/// манипуляция с Tuple
|
||
|
||
void insertColumn(size_t pos, SharedPtr<IColumn> & column)
|
||
{
|
||
if (pos > data.size())
|
||
throw Exception("Position out of bound in ColumnTuple::insertColumn().",
|
||
ErrorCodes::POSITION_OUT_OF_BOUND);
|
||
|
||
data.insert(data.begin() + pos, column);
|
||
checkSizes();
|
||
}
|
||
|
||
void eraseColumn(size_t pos)
|
||
{
|
||
if (data.size() == 1)
|
||
throw Exception("Empty tuple", ErrorCodes::EMPTY_TUPLE);
|
||
|
||
if (pos >= data.size())
|
||
throw Exception("Position out of bound in ColumnTuple::eraseColumn().",
|
||
ErrorCodes::POSITION_OUT_OF_BOUND);
|
||
|
||
data.erase(data.begin() + pos);
|
||
}
|
||
};
|
||
|
||
|
||
}
|
||
|
||
#endif
|