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#pragma once
#include <Core/Block.h>
namespace DB
{
/// Helps in-memory storages to extract columns from block.
/// Properly handles cases, when column is a subcolumn and when it is compressed.
ColumnPtr getColumnFromBlock(const Block & block, const NameAndTypePair & requested_column);
ColumnPtr tryGetColumnFromBlock(const Block & block, const NameAndTypePair & requested_column);
}
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