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#pragma once
#include <Columns/ColumnArray.h>
#include "ArraySourceVisitor.h"
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
namespace GatherUtils
{
struct IArraySource
{
virtual ~IArraySource() = default;
virtual size_t getSizeForReserve() const = 0;
virtual const typename ColumnArray::Offsets & getOffsets() const = 0;
virtual size_t getColumnSize() const = 0;
virtual bool isConst() const { return false; }
virtual bool isNullable() const { return false; }
virtual void accept(ArraySourceVisitor &)
{
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Accept not implemented for {}", demangle(typeid(*this).name()));
}
};
template <typename Derived>
class ArraySourceImpl : public Visitable<Derived, IArraySource, ArraySourceVisitor> {};
}
}
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