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#pragma once
#include <Processors/IInflatingTransform.h>
#include <Processors/Transforms/AggregatingTransform.h>
#include <Processors/Transforms/RollupTransform.h>
#include <Processors/Transforms/finalizeChunk.h>
namespace DB
{
/// Takes blocks after grouping, with non-finalized aggregate functions.
/// Calculates all subsets of columns and aggregates over them.
class CubeTransform : public GroupByModifierTransform
{
public:
CubeTransform(Block header, AggregatingTransformParamsPtr params, bool use_nulls_);
String getName() const override { return "CubeTransform"; }
protected:
Chunk generate() override;
private:
const ColumnsMask aggregates_mask;
Columns current_columns;
Columns current_zero_columns;
UInt64 mask = 0;
UInt64 grouping_set = 0;
};
}
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