针对两个php变量的多表全文搜索

我有三个信息表，其中业务id是公共线程。我有两个输入字段，一个用于一般搜索（用户可以搜索他们想要的任何内容）和一个zip输入。在php端，我捕获常规搜索字符串并将其设置为

$search

，将zip设置为

$zip

如何使用

$search

变量

匹配
任何全文索引，然后使用
$zip
限制这些匹配，然后只返回表c中的id

我的数据库结构如下：

table coup
    id  << this is the my desired information from the search
    timestamp
    business_id
    coupvalue
    startdate
    enddate
    username
    status
    terms
    image
    description
        primary = id
        fulltext = name
table bloc
    id
    address
    city
    state
    zip
    business_id
    phone
    lat
    lon
        primary = id
table bus
    business_id
    name
    timestamp
    category
    subcat
        primary = business_id
        fulltext = name,category,subcat

表耦合
id您可以对匹配项使用
或
条件：

select
    c.id
from
    coup c
    inner join bus b on
        c.business_id = b.business_id
    inner join block z on
        c.buisness_id = z.business_id
    where
        (match(c.name) against ('$search')
        or match (b.name, b.category, b.subcat) against ('$search'))
        and z.zip = '$zip'

我尚未对其进行基准测试，但这可能会更快：

select
   c.id
from
    (select id, business_id 
     from coup 
     where match(name) against ('$search')
    ) as c
    left join
       (select business_id 
        from bus 
        where match(name, category, subcat) against ('$search')
       ) as b on
        c.business_id = b.business_id 
    inner join bloc z on
        c.business_id = z.business_id
where
    z.zip = '$zip'

不过我想将c.name、b.category、b.subcat添加到匹配中。全文搜索只在各自的索引中起作用。据我所知，您不能进行多表全文索引。