ExprNode.h

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#ifndef EXPR_EXPRNODE_H
#define EXPR_EXPRNODE_H
 
#include "tdb.h"
#include "storage/Record.h"
 
#include "utils/tree/TreeNode.h"
#include "utils/tree/NodeTag.h"
#include "catalog/systables/Type.h"
 
namespace taco {
 
class ExprNode: public TreeNode {
public:
    template<class ...UniquePtrs>
    ExprNode(NodeTag tag, UniquePtrs&& ...input):
        TreeNode(tag, std::forward<UniquePtrs>(input)...) {}
 
    virtual ~ExprNode() {}
 
    virtual Datum Eval(const std::vector<NullableDatumRef>& record) const = 0;
 
    virtual Datum Eval(const char* record) const = 0;
 
    std::shared_ptr<const SysTable_Type> ReturnType() const {
        return m_type;
    }
 
protected:
    std::shared_ptr<const SysTable_Type> m_type;
};
 
}
 
#endif      // QUERY_EXPR_EXPRNODE_H