请参阅下面的InsertHelpQuestion2程序。
DROP PROCEDURE InsertHelpQuestion2;
CREATE PROCEDURE InsertHelpQuestion2(user_id char(50),scenerio_id char(50),component_id char(50))
BEGIN
DECLARE uu_id char(50);
SELECT BinToUUID(NewUUID()) INTO uu_id from helpquestion LIMIT 1;
SET @fields_part = 'INSERT INTO helpquestion(HelpQuestionKey,UserKey';
SET @values_part = CONCAT(' VALUES(UUIDToBin(\"', uu_id, '\"), UUIDToBin(\"', user_id, '\")');
IF (scenerio_id) THEN
SET @fields_part = CONCAT(@fields_part, ', ScenarioKey');
SET @values_part = CONCAT(@values_part, ', UUIDToBin("', scenerio_id, '")');
END IF;
IF (component_id) THEN
SET @fields_part = CONCAT(@fields_part, ', ComponentKey');
SET @values_part = CONCAT(@values_part, ', UUIDToBin("', component_id, '")');
END IF;
SET @query_full = CONCAT(@fields_part , @values_part, ';');
PREPARE STMT FROM @query_full;
EXECUTE STMT;
END
它有3个参数user_id,scenerio_id,component_id所有都是外键。
NewUUID(),UUIDToBin是存储函数。
由于字段有外部引用,我需要在过程中编写动态sql,以便以下调用工作
CALL InsertHelpQuestion2('F70724DC-AC0D-102D-9C16-00163EEDFCFC', '0F69476A-ABF2-102D-9C16-00163EEDFCFC', '06FFEE04-1FD9-11DF-9B60-001F16F664A9');
CALL InsertHelpQuestion2('F70724DC-AC0D-102D-9C16-00163EEDFCFC', '0F69476A-ABF2-102D-9C16-00163EEDFCFC', '');
CALL InsertHelpQuestion2('F70724DC-AC0D-102D-9C16-00163EEDFCFC', '', '');
但第一次打电话
CALL InsertHelpQuestion2('F70724DC-AC0D-102D-9C16-00163EEDFCFC', '0F69476A-ABF2-102D-9C16-00163EEDFCFC', '06FFEE04-1FD9-11DF-9B60-001F16F664A9');
发生以下错误
[Err] 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 'VALUES(UUIDToBin("69490F3A-6FD3-11DF-964F-F4CE462E9D80"), UUIDToBin("F70724DC-AC' at line 1
字符串连接有什么错误吗?
答案 0 :(得分:1)
使用print @query_full
查看您尝试执行的查询。您可以在单独的窗口中复制/粘贴它以进行调试。
一个明显的错误似乎是转义序列。
select '\"'
->
\"
答案 1 :(得分:1)
看起来你可能需要一个右括号。
SET @query_full = CONCAT(@ field_part,@ value_part,');');