PlanNode.h

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#ifndef PLAN_PLANNODE_H
#define PLAN_PLANNODE_H
 
#include "tdb.h"
 
#include <memory>
#include <vector>
 
#include "catalog/Schema.h"
#include "utils/tree/TreeNode.h"
#include "catalog/systables/initoids.h"
 
namespace taco {
 
class PlanExecState;
 
class PlanNode: public TreeNode {
public:
    template<class ...UniquePtrs>
    PlanNode(NodeTag tag, UniquePtrs&& ...input):
        TreeNode(tag, std::forward<UniquePtrs>(input)...) {}
 
    virtual ~PlanNode() {}
 
    virtual std::unique_ptr<PlanExecState> create_exec_state() const = 0;
 
    virtual const Schema* get_output_schema() const = 0;
 
protected:
    PlanNode* get_child(size_t i) const {
        return get_input_as<PlanNode>(i);
    }
};
 
}   // namespace taco
 
#endif