接受具有多個參數的字符串的MySQL存儲過程

Question

我想創建一個存儲過程，它將IN參數中的所有值作爲單個字符串接受。

DELETE FROM object 
WHERE Type NOT IN 
    ('ListGrid', 
    'TextField', 
    'SpinBox', 
    'MenuButton', 
    'ListGrid', 
    'RadioButton', 
    'DropDown', 
    'PopUp', 
    'Element', 
    'Checkbox', 
    'TreeDropDown', 
    'TblColumn', 
    'Button', 
    'Link', 
    'Filter', 
    'TblRow', 
    'GridRow', 
    'Popup') 

這是我試過的一個例子，但它不起作用。

DELIMITER // 
CREATE PROCEDURE deleteObjectTypes(IN p_type VARCHAR(255)) 
BEGIN 
SET @query = CONCAT ('DELETE FROM object WHERE Type NOT IN (',p_type,')'); 
PREPARE stmt FROM @query; 
EXECUTE stmt; 
DEALLOCATE PREPARE stmt; 
END // 
DELIMITER ; 

我收到以下錯誤：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''List)' at line 1 

當運行這個查詢：

CALL deleteObjectTypes("'ListGrid1','TextField1','SpinBox1','MenuButton1','ListGrid2','TextField2','SpinBox2','MenuButton2','ListGrid3','TextField3','SpinBox3','MenuButton3','ListGrid4','TextField4','SpinBox4','MenuButton4','ListGrid5','TextField5','SpinBox5','MenuButton5','ListGrid6','TextField6','SpinBox6','MenuButton6'") 

Answer 1

您需要更改VARCHAR的大小到它的最大值（或更低顯著值） 。

DELIMITER // 
CREATE PROCEDURE deleteObjectTypes(IN p_type VARCHAR(65535)) 
BEGIN 
    SET @query = CONCAT ('DELETE FROM object WHERE Type NOT IN (',p_type,')'); 
    PREPARE stmt FROM @query; 
    EXECUTE stmt; 
    DEALLOCATE PREPARE stmt; 
END // 
DELIMITER ; 

但是，請注意限制較低，如果您使用的是多字節字符集：

VARCHAR(21844) CHARACTER SET utf8 

可以看出here。

Answer 2

（對不起，我不能添加評論太低的聲譽） 你的程序看起來不錯，也許問題是在別的地方？注意，我們已經定義爲VARCHAR 255個字符，您所提供的例子不止這個數（291個字符）

Answer 3

你應該試試這個（簡稱爲例）：

DELETE 
FROM 
    object 
WHERE 
    NOT FIND_IN_SET(Type, 'ListGrid,TextField,SpinBox,MenuButton,ListGrid'); 

，並與存儲過程

DELIMITER // 
CREATE PROCEDURE deleteObjectTypes(IN p_type VARCHAR(255)) 
BEGIN 
    DELETE 
    FROM 
    object 
    WHERE 
    NOT FIND_IN_SET(Type, p_type); 
END // 
DELIMITER ; 

---

CALL deleteObjectTypes('ListGrid1,TextField1,SpinBox1,MenuButton1,ListGrid2,TextField2,SpinBox2,MenuButton2,ListGrid3,TextField3,SpinBox3,MenuButton3,ListGrid4,TextField4,SpinBox4,MenuButton4,ListGrid5,TextField5,SpinBox5,MenuButton5,ListGrid6,TextField6,SpinBox6,MenuButton6');