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#pragma once
#include "columns/column.h"
namespace NClickHouse {
struct TBlockInfo {
ui8 IsOverflows = 0;
i32 BucketNum = -1;
};
class TBlock {
public:
/// Allow to iterate over block's columns.
class TIterator {
public:
TIterator(const TBlock& block);
/// Name of column.
const TString& Name() const;
/// Type of column.
TTypeRef Type() const;
/// Reference to column object.
TColumnRef Column() const;
/// Move to next column.
void Next();
/// Is the iterator still valid.
bool IsValid() const;
private:
TIterator() = delete;
const TBlock& Block_;
size_t Idx_;
};
public:
TBlock();
TBlock(size_t cols, size_t rows);
~TBlock();
/// Append named column to the block.
void AppendColumn(const TString& name, const TColumnRef& col);
/// Count of columns in the block.
size_t GetColumnCount() const;
const TBlockInfo& Info() const;
/// Count of rows in the block.
size_t GetRowCount() const;
/// Append block to the current (vertical scale)
void AppendBlock(const TBlock& block);
/// Reference to column by index in the block.
TColumnRef operator[](size_t idx) const;
private:
struct TColumnItem {
TString Name;
TColumnRef Column;
};
TBlockInfo Info_;
TVector<TColumnItem> Columns_;
/// Count of rows in the block.
size_t Rows_;
};
}
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