MySQL存储过程接受带有多个参数的字符串

Question

我想创建一个存储过程，该存储过程接受IN参数中的所有值作为单个字符串。

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')

这是我尝试过的一个示例，但是没有用。

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 ;

我收到以下错误：

#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

运行此查询时：

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

您需要将VARCHAR大小更改为最大值（或较低的有效值）。

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，请注意，如果使用多字节字符集，则限制会更低：

VARCHAR(21844) CHARACTER SET utf8