public C forceIndex(String... indexes) {
        return addJoinFlag(" force index (" + String.join(", ", indexes) + ")", JoinFlag.Position.END);
    }
You can use FORCE INDEX, which acts like USE INDEX (index_list) but with the addition that a
table scan is assumed to be very expensive. In other words, a table scan is used only if there
is no way to use one of the given indexes to find rows in the table.

@param indexes index names
@return the current object
querydsl-sql/src/main/java/com/querydsl/sql/mysql/AbstractMySQLQuery.java