ProjectionState.h

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#ifndef EXECUTION_PROJECTIONSTATE_H
#define EXECUTION_PROJECTIONSTATE_H
 
#include "execution/PlanExecState.h"
#include "plan/Projection.h"
 
namespace taco {
 
class ProjectionState: public PlanExecState {
public:
    ~ProjectionState() override;
 
    void init() override;
 
    bool next_tuple() override;
 
    void node_properties_to_string(std::string &buf, int indent) const override;
 
    std::vector<NullableDatumRef> get_record() override;
 
    void close() override;
 
    void rewind() override;
 
    Datum save_position() const override;
 
    bool rewind(DatumRef saved_position) override;
 
    const PlanNode*
    get_plan() const override {
        return m_plan;
    }
 
private:
    ProjectionState(const Projection* plan, std::unique_ptr<PlanExecState>&& child);
 
    const Projection*       m_plan;
    std::vector<Datum>      m_fields;
 
    friend class Projection;
};
 
}    // namespace taco
 
#endif