mysql - 全文 : this query very slow

Question

我正在使用这个查询，但不幸的是它运行缓慢:

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。这意味着将执行15000条记录，但查询需要大约25秒的时间。我正在使用 PDO。

Answer 1

您将需要 FULLTEXT 索引，否则 DBMS 每次都需要搜索整个表。这确实减慢了记录的插入速度。请注意，对 4 列的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)