Question

我正在使用此查询，但遗憾的是它运行缓慢：

SELECT *,
    (MATCH(`title`) AGAINST ('$word' IN BOOLEAN MODE) * 2
    + MATCH(`content`) AGAINST ('$word' IN BOOLEAN MODE) * 2
    + MATCH(`url`) AGAINST ('$word' IN BOOLEAN MODE) * 1.1
    + MATCH(`desc`) AGAINST ('$word' IN BOOLEAN MODE) * 1.2) * `like`
    AS score
FROM `data`
WHERE MATCH(`content`,`desc`,`title`,`url`) AGAINST ('$word' IN BOOLEAN MODE)
ORDER BY `score` DESC LIMIT 1000

数据库的结果是15000.这意味着将完成15000条记录，但查询时间大约需要25秒。我正在使用PDO。

Answer 1

您将需要FULLTEXT索引，否则DBMS将需要每次都搜索整个表。这确实减慢了记录的插入速度。请注意，对4列进行全文搜索总是相对较慢。

CREATE FULLTEXT INDEX indexTitle ON `data` (title)
CREATE FULLTEXT INDEX indexContent ON `data` (content)
CREATE FULLTEXT INDEX indexURL ON `data` (url)
CREATE FULLTEXT INDEX indexDesc ON `data` (desc)
CREATE FULLTEXT INDEX combinedIndex ON `data` (content, desc, title, url)

全文：这个查询很慢

1 个答案: