| MiniOB 1
    MiniOB is one mini database, helping developers to learn how database works. | 
成员的完整列表,这些成员属于 ExpressionTuple,包括所有继承而来的类成员
| cell_at(int index, Value &cell) const override | ExpressionTuple | inlinevirtual | 
| cell_num() const override | ExpressionTuple | inlinevirtual | 
| expressions_ (定义于 ExpressionTuple) | ExpressionTuple | private | 
| ExpressionTuple(std::vector< std::unique_ptr< Expression > > &expressions) (定义于 ExpressionTuple) | ExpressionTuple | inline | 
| find_cell(const TupleCellSpec &spec, Value &cell) const override | ExpressionTuple | inlinevirtual | 
| to_string() const (定义于 Tuple) | Tuple | inlinevirtual | 
| Tuple()=default (定义于 Tuple) | Tuple | |
| ~ExpressionTuple() (定义于 ExpressionTuple) | ExpressionTuple | inlinevirtual | 
| ~Tuple()=default (定义于 Tuple) | Tuple | virtual |