MySQL未知列错误，但结果似乎还可以，并且查询在phpMyAdmin中有效

Question

This is very strange. I am using MySQLi in PHP 5, and when executing the following query, i end up with an error in my httpd log similar as follows

[error] [client 192.168.0.1] Unknown column 'memberid' in 'where clause', referer: http://www.example.com/app/add-device
[error] [client 192.168.0.1] fetch_row[0] failed, referer: http://localhost/app/add-device

The query itself

$this->db->query('
                            SELECT
                                `members`.`id`,
                                `members_timezones`.`timezone`,
                                `members`.`memberid`
                            FROM
                                `members`
                            RIGHT JOIN
                                `members_timezones` ON `members_timezones`.`memberid` = `members`.`id`
                            WHERE
                                `members`.`systemid` = ' . SYSTEM_ID . '
                                AND
                                `members`.`memberid` = ' . intval($this->user->uid)  . '
                                AND
                                `members`.`user` IS NULL
                            LIMIT 1
                        ');

Just to clarify, the above query does respond with expected results, however my httpd log is being spammed with an error that claims that column does not exist when it does. It is also claiming that 'fetch' is not returning anything -- it does as well.

I would like to eliminate this false error from my system.

----- ADDED ------

The query results

id  timezone    memberid
12  America/New_York    2

The query results (EXPLAIN)

id  select_type table   partitions  type    possible_keys   key key_len ref rows    Extra
1   SIMPLE  members_timezones   NULL    ALL NULL    NULL    NULL    NULL    2    
1   SIMPLE  members NULL    eq_ref  PRIMARY PRIMARY 4   linked24.members_timezones.memberid 1   Using where

members

Column  Type    Comment
id  int(11) Auto Increment   
details text NULL    
user    varchar(35) NULL     
pass    varchar(512) NULL    
entered timestamp NULL [0000-00-00 00:00:00]     
updated timestamp NULL   
pass_key    varchar(32) NULL
systemid    int(11)  
memberid    int(11)

members_timezones

Column  Type    Comment
id  int(11) Auto Increment   
memberid    int(11)  
timezone    varchar(80) [UTC]

Answer 1

I was able to resolve this issue by aliasing all the fields in use.

SELECT Table.Field As Field FROM Table

Not sure as to why this worked, but I am content that there is no further errors being reported.