我正在尝试使用 Navicat 使用 mysql 执行存储过程,当我执行这个存储过程时,我得到 0 行,但是当我执行我想要的存储过程部分时,我得到 1 行,这就是我想要的。存储过程是这样的:
BEGIN
#Routine body goes here...
IF @autor=0 THEN
SELECT DISTINCT bdocus.ano_pub
FROM bdocus INNER JOIN
descriptores_bdocus ON bdocus.nserie = descriptores_bdocus.nserie INNER JOIN
descriptores ON descriptores_bdocus.iddescriptor = descriptores.id
WHERE (bdocus.descriptores LIKE '%Victimización%')AND(bdocus.ano_pub LIKE CONCAT(@anyo,'%')) AND (bdocus.codigo_area LIKE CONCAT(@tema,'%')) AND(bdocus.codigo_colectivo LIKE CONCAT(@colectivo,'%')) AND (descriptores.nombre = @descriptores)
GROUP BY bdocus.ano_pub
ORDER BY bdocus.ano_pub DESC;
ELSE
SELECT DISTINCT bdocus.ano_pub
FROM bdocus INNER JOIN
descriptores_bdocus ON bdocus.nserie = descriptores_bdocus.nserie INNER JOIN
descriptores ON descriptores_bdocus.iddescriptor = descriptores.id INNER JOIN
autores_bdocus ON bdocus.nserie = autores_bdocus.nserie
WHERE (bdocus.descriptores LIKE '%Victimización%') AND (autores_bdocus.idautor = @autor) AND(bdocus.ano_pub LIKE CONCAT(@anyo,'%')) AND (bdocus.codigo_area LIKE CONCAT(@tema,'%')) AND(bdocus.codigo_colectivo LIKE CONCAT(@colectivo,'%')) AND (descriptores.nombre = @descriptores)
GROUP BY bdocus.ano_pub
ORDER BY bdocus.ano_pub DESC;
END IF;
END
参数是这样的:
IN `@anyo` varchar(20),IN `@tema` varchar(20),IN `@autor` int,
IN `@colectivo` varchar(30),IN `@descriptores` varchar(40)
我想要的值是@anyo='2013'
、@tema='%'
、@autor=44439
code>,对于 @colectivo='%'
和 @descriptores='Violencia Sex'
。
当我运行存储过程的第二部分时,我的意思是:
SELECT DISTINCT bdocus.ano_pub
FROM bdocus INNER JOIN
descriptores_bdocus ON bdocus.nserie = descriptores_bdocus.nserie INNER JOIN
descriptores ON descriptores_bdocus.iddescriptor = descriptores.id INNER JOIN
autores_bdocus ON bdocus.nserie = autores_bdocus.nserie
WHERE (bdocus.descriptores LIKE '%Victimización%') AND (autores_bdocus.idautor = 44439) AND(bdocus.ano_pub LIKE CONCAT('%','%')) AND (bdocus.codigo_area LIKE CONCAT('%','%')) AND(bdocus.codigo_colectivo LIKE CONCAT('%','%')) AND (descriptores.nombre = 'Violencia sexual')
GROUP BY bdocus.ano_pub
ORDER BY bdocus.ano_pub DESC;
结果我得到一行包含我想要的值。那么区别在哪里呢?提前致谢。
最佳答案
指出 9.4. User-Defined Variables 之间的区别很重要和常规参数13.1.15. CREATE PROCEDURE and CREATE FUNCTION Syntax ,是不同的变量。
在您的示例中,@anyo
可能是 NULL
并且 `@anyo`
被分配给 '2013'
.
关于mysql - 存储过程和查询执行结果不同,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30076913/