Question

更新：问题似乎已修复，原因是我在声明时使用了不同的小写而不是大写字母。但是，我现在面临的问题是“vw_formdatahard”视图只是填充了多个“NULL”。我在这里疯了。

我有一个程序可以根据Wordpress＆amp;中的可用数据创建视图。 Buddypress数据库。这在我的本地Mamp服务器上运行正常，但每当我在托管服务器上调用该过程时都会出错。即使我将整个数据库从本地服务器复制到在线服务器，它也会返回错误。我不是mysql的英雄，所以我在这里走得很远......为什么不运行呢？

以下查询失败：“CALL stp_FormQueryBuilder（）; MySQL说：＃1054 - '字段列表'中的未知列'd.user_id'

BEGIN 


DECLARE sqlText text;

DROP VIEW IF EXISTS vw_FormDataRows;

CREATE VIEW vw_FormDataRows AS
SELECT d.user_id, f.name, 
CASE WHEN left(f.name, 4) = 'FOTO' && LEFT(d.value, 9) = '/profiles' THEN CONCAT("/wp-content/uploads",d.value)
ELSE d.value END AS 'value'


        FROM wp_bp_xprofile_fields AS F 
        LEFT JOIN wp_bp_xprofile_data AS D ON F.id = D.field_id
        WHERE 
            parent_id = 0 
            AND group_id = 1
            AND d.user_id IN(SELECT U.user_id FROM wp_usermeta AS U WHERE U.meta_key = 'wp_user_level' AND U.meta_value = '0')

ORDER BY d.user_id, f.id;

DROP TEMPORARY TABLE IF EXISTS temp1;

CREATE TEMPORARY TABLE temp1 (SELECT b.user_id, b.name, b.value
FROM (SELECT d.user_id, f.name, d.value
FROM wp_bp_xprofile_fields AS F 
LEFT JOIN wp_bp_xprofile_data AS D ON F.id = D.field_id
WHERE 
    parent_id = 0 
    AND group_id = 1
            AND d.user_id IN(SELECT U.user_id FROM wp_usermeta AS U WHERE U.meta_key = 'wp_user_level' AND U.meta_value = '0')
ORDER BY d.user_id, f.id ) AS B);


SET @sql = NULL;

SET group_concat_max_len = 4096;

SELECT GROUP_CONCAT(DISTINCT
         CONCAT('MAX(CASE WHEN name = ', name,
                ' THEN value END) AS `', replace(name, ' ','_'), '`'))
  INTO sqlText
  FROM temp1;


DROP VIEW IF EXISTS vw_FormDataHard;

SET @sql = CONCAT('CREATE VIEW vw_FormDataHard AS SELECT user_id, ', sqlText, ' 
                     FROM vw_FormDataRows 
                    GROUP BY user_id');


PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

DROP TEMPORARY TABLE IF EXISTS temp1;

END

Answer 1

您从未定义别名d只是D，这些是不同的，因为别名区分大小写。

Answer 2

您声明大写字母“D”并使用小写字母“d” 所以，改变任何一个

生成的视图填充NULL

2 个答案: