| 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 SetVariableStmt,包括所有继承而来的类成员
| create(const SetVariableSqlNode &set_variable, Stmt *&stmt) | SetVariableStmt | inlinestatic | 
| create_stmt(Db *db, ParsedSqlNode &sql_node, Stmt *&stmt) (定义于 Stmt) | Stmt | static | 
| set_variable_ (定义于 SetVariableStmt) | SetVariableStmt | private | 
| SetVariableStmt(const SetVariableSqlNode &set_variable) (定义于 SetVariableStmt) | SetVariableStmt | inline | 
| Stmt()=default (定义于 Stmt) | Stmt | |
| type() const override (定义于 SetVariableStmt) | SetVariableStmt | inlinevirtual | 
| var_name() const (定义于 SetVariableStmt) | SetVariableStmt | inline | 
| var_value() const (定义于 SetVariableStmt) | SetVariableStmt | inline | 
| ~SetVariableStmt()=default (定义于 SetVariableStmt) | SetVariableStmt | virtual | 
| ~Stmt()=default (定义于 Stmt) | Stmt | virtual |