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我正在尝试对按相关性排序的数据库进行搜索。

以下两个查询都有效，只有第一个不返回任何结果。

我曾尝试使用 IN BOOLEAN MODE，但这只会使我的 title_relevance 和 desc_relevance 字段为 0 或 1，并且我想根据术语的相关性来正确排名，而不仅仅是它是否出现。

有什么办法可以做到这一点？？

谢谢！

第一个查询：

SELECT 
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nur*')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nur*')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nur*') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated

第二个查询：

SELECT
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nurse')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nurse')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nurse') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated

不使用通配符搜索 'nur' 也会产生零结果：

SELECT
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nur')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nur')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nur') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated
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1 回答 1

1

可能是表达式中AGAINST不应该包含通配符？您正在执行全文搜索，而不是类似LIKE查询。

于 2013-01-25T14:49:54.987 回答