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  ______   _    _              __   __   ______   
 /_   _// | || | ||   ____     \ \\/ // |      \\ 
 `-| |,-  | || | ||  |    \\    \ ` //  |  --  // 
   | ||   | \\_/ ||  | [] ||     | ||   |  --  \\ 
   |_||    \____//   |  __//     |_||   |______// 
   `-`'     `---`    |_|`-`      `-`'   `------`  
                     `-`

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發送短信 : Join order algorithm using predefined optimal join order