匹配（…）反对后（…在布尔模式下），左联接不起作用

Question

This query:

$user_mail_all=mysql_query("SELECT * 
FROM `mailing` WHERE MATCH (resp) 
AGAINST ('$user_resp' IN BOOLEAN MODE) 
OR `cor`='$username' ORDER BY `id` DESC  LIMIT ".$start.",".$per_page )

is working well, but next query:

$user_mail_all=mysql_query("SELECT * 
FROM `mailing`WHERE MATCH (resp) 
AGAINST ('$user_resp' IN BOOLEAN MODE) 
OR `cor`='$username' 
LEFT JOIN `mail_views` 
ON mailing.id=mail_views.lid 
AND mail_views.uid=".$_SESSION['uid']." 
ORDER BY `id` DESC  LIMIT ".$start.",".$per_page)

Results in an error:

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 'LEFT JOIN mail_views ON mailing.id=mail_views.lid AND mail_views.uid=12 ORDER ' at line 1

Why?

Answer 1

First JOIN then MATCH

$user_mail_all=mysql_query("SELECT * 
FROM `mailing`
LEFT JOIN `mail_views` 
ON mailing.id=mail_views.lid 
WHERE MATCH (resp) 
AGAINST ('$user_resp' IN BOOLEAN MODE) 
OR `cor`='$username' 
AND mail_views.uid=".$_SESSION['uid']." 
ORDER BY `id` DESC  LIMIT ".$start.",".$per_page)

Answer 2

in your query implementation of left join is wrong...it should be:

select * from Table1 left join table2 where .....

so use this:

           $user_mail_all=
                mysql_query(
                             "SELECT * 
                                FROM `mailing`
                           LEFT JOIN `mail_views` 
                                 ON ( mailing.id=mail_views.lid 
                                     AND mail_views.uid=".$_SESSION['uid']".)
                              WHERE MATCH (resp) 
                                    AGAINST ('$user_resp' IN BOOLEAN MODE) 
                                 OR `cor`='$username'
                           ORDER BY `id` DESC  LIMIT ".$start.",".$per_page);