Projection.h

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#ifndef PLAN_PROJECTION_H
#define PLAN_PROJECTION_H
 
#include "tdb.h"
#include "catalog/systables/Type.h"
 
#include "plan/PlanNode.h"
#include "expr/ExprNode.h"
 
namespace taco {
 
class ProjectionState;
 
class Projection: public PlanNode {
public:
    static std::unique_ptr<Projection>
    Create(std::unique_ptr<PlanNode>&& child,
           std::vector<std::unique_ptr<ExprNode>>&& exprs);
 
    ~Projection() override;
 
    void node_properties_to_string(std::string& buf, int indent) const override;
 
    std::unique_ptr<PlanExecState> create_exec_state() const override;
 
    const Schema* get_output_schema() const override;
private:
    Projection(std::unique_ptr<PlanNode>&& child,
               std::vector<std::unique_ptr<ExprNode>>&& exprs);
 
    std::vector<std::unique_ptr<ExprNode>> m_exprs;
    std::unique_ptr<Schema> m_schema;
 
    friend class ProjectionState;
};
 
}    // namespace taco
 
#endif