ClickHouse/src/Processors/QueryPlan/TotalsHavingStep.h

#pragma once
#include <Processors/QueryPlan/ITransformingStep.h>
#include <Processors/Transforms/finalizeChunk.h>

namespace DB
{

class ActionsDAG;
using ActionsDAGPtr = std::shared_ptr<ActionsDAG>;

enum class TotalsMode;

/// Execute HAVING and calculate totals. See TotalsHavingTransform.
class TotalsHavingStep : public ITransformingStep
{
public:
    TotalsHavingStep(
        const DataStream & input_stream_,
        const AggregateDescriptions & aggregates_,
        bool overflow_row_,
        const ActionsDAGPtr & actions_dag_,
        const std::string & filter_column_,
        bool remove_filter_,
        TotalsMode totals_mode_,
        double auto_include_threshold_,
        bool final_);

    String getName() const override { return "TotalsHaving"; }

    void transformPipeline(QueryPipelineBuilder & pipeline, const BuildQueryPipelineSettings & settings) override;

    void describeActions(JSONBuilder::JSONMap & map) const override;
    void describeActions(FormatSettings & settings) const override;

    const ActionsDAGPtr & getActions() const { return actions_dag; }

private:
    void updateOutputStream() override;

    const AggregateDescriptions aggregates;

    bool overflow_row;
    ActionsDAGPtr actions_dag;
    String filter_column_name;
    bool remove_filter;
    TotalsMode totals_mode;
    double auto_include_threshold;
    bool final;
};

}