Question

我正在使用MySQL 5.6并尝试一个简单的过程，如下所示。

drop procedure if exists procsBook;

DELIMITER $$

CREATE PROCEDURE procsBook()

main:begin

DECLARE abc VARCHAR(256);

DECLARE def VARCHAR(256);

DECLARE field_name2 VARCHAR(256);

DECLARE field_names VARCHAR(256);

DECLARE bkid BIGINT(20);

SET abc:= NULL;

SET def:= NULL;

SET field_name2:= NULL;

SET field_names:= NULL;

SET bkid:= 0;

select a.field_name,b.column_name into abc,def from  table1 a join table2 b where a.field_label=b.field_label and b.table_name='Table13' and b.section_name='English' group by a.field_name limit 1;

IF(abc is not null)
then

IF (SUBSTRING(abc,7,1)=1)

THEN

SELECT book1,bookId INTO field_names,bkid FROM shelf1 WHERE rowstate=0;

SET @vSelectQury = CONCAT('update shelf2 set def = ' , field_names, ' where book_id = ', bkid);
PREPARE vDynamicSSql FROM @vSelectQury;

EXECUTE vDynamicSSql;

DEALLOCATE PREPARE vDynamicSSql;

END IF;

END IF;

END $$
DELIMITER ;

呼叫：

call procsBook();

这会引发以下错误：

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 'where book_id = 22' at line 1

请帮忙吗？

Answer 1

我认为您需要在field_names周围添加引号。

SET @vSelectQury = CONCAT（＆＃39;更新shelf2 set＆＃39;，def，＆＃39; = \＆＃39;＆＃39;，field_names，＆＃39; \＆＃39; book_id =＆＃39;，bkid）;准备vDynamicSSql FROM @vSelectQury;

（或者如果您的设置不同，则可能需要更改转换为＆＃39;字符）

已更新您不应直接使用def，但在这种情况下请使用def的值。

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1 个答案: