subquery (Incorrect arguments to AGAINST) using Mysql

Question

When I execute this query with MATCH AGAINST using MySql (see Query 1st) the issue in this query they has generated an error lik

Answer 1

The problem is that the argument for AGAINST must be a literal string, for example 'Fred'. It is not allowed to use a column name like uf.user_id.

MATCH (up.`user_id`) AGAINST (uf.`user_id`)
--                            ^^^^^^^^^^^^ not allowed!

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.