在连接表中匹配导致错误

Question

我有两张桌子。在将它们连接在一起的查询中，我尝试进行如下全文搜索：

SELECT o44_1_0.attr_80748_ AS attr_80737_, MATCH o44_1_0.attr_80748_ AGAINST ('something' IN BOOLEAN MODE)  AS relev  
FROM object_80726_ f1  
LEFT OUTER JOIN (
 SELECT id_field, attr_80748_ FROM (
   SELECT m0.id_field,  attr_80748_  FROM object_80738_ o
   INNER JOIN master_slave m0 ON (m0.id_object = 80726) AND (m0.id_master = 80738) AND m0.id_slave_field = o.id                        
   ORDER BY  o.id_order 
 ) AS o  GROUP BY id_field 
)  AS o44_1_0 ON f1.id = o44_1_0.id_field 

对你来说可能看起来很糟糕，但是不要注意查询的细节。看看我如何进行全文搜索：

...MATCH o44_1_0.attr_80748_ AGAINST ('something' IN BOOLEAN MODE)  AS relev...

此部分查询导致错误：

Error Code : 1214
The used table type doesn't support FULLTEXT indexes

如果我发表评论，那么一切都好。但是，错误似乎不正确，因为如果我在连接表本身中进行全文搜索，那么查询运行没有任何问题。所以，这有效：

SELECT attr_80748_, MATCH attr_80748_ AGAINST ('something' IN BOOLEAN MODE)  AS relev  
FROM object_80738_

所以，同一个表和相同的字段，但这次mysql不会抛出任何错误。