Using a Subquery in the Against for a FULLTEXT search in Mysql

问题

In MySQL, I would like to do a FULLTEXT search on a table 'articles'. The text I want to search against would be located in another table, 'Vectors' under the column 'CVs'

I am trying:

SELECT website 
FROM articles
WHERE MATCH (title, body)
AGAINST(
    SELECT CVs
    FROM Vectors
    WHERE Title="cv1")

However, it keeps returning syntax error.

Is it possible to run a subquery in the AGAINST clause?

回答1:

You would like to be able to do:

SELECT website 
FROM articles cross join
     vectors
WHERE title = 'cv1' and MATCH (title, body) AGAINST(cv);

But, the argment in against needs to be a constant.

You can resort to:

SELECT website 
FROM articles cross join
     vectors
WHERE title = 'cv1' and
      (title like concat('%', cv, '%') or body like concat('%', cv, '%'))

回答2:

From the documentation

The search string must be a literal string, not a variable or a column name.

You probably need to use LIKE instead of MATCH, though you should note that it will be much slower.

来源：https://stackoverflow.com/questions/15735562/using-a-subquery-in-the-against-for-a-fulltext-search-in-mysql