sql error with inner join mysql - mysql

Question

String sql = "set #row \\:=-1; SELECT ue.id, ue.Latitude, ue.Longitude, ue.Serving_Cell, ue.RSCP
FROM ue INNER JOIN(
SELECT id
from (
SELECT #row \\:=#row+1 as rownum, id
from (
select id from ue order by id) as sorted
)as ranked
where rownum %20=0) as subset
on subset.id = ue.id
where Operator like :operator ";
Query query = getSessionFactory().getCurrentSession().createSQLQuery(sql);
query.setParameter("operator", "%" + operator + "%");
return query.list();
help me please to find my sql error
console render me :
GRAVE: Servlet.service() for servlet [mvc-dispatcher] in context with path [/SpringSecurity] threw exception [Request processing failed; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet] with root cause
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT ue.id, ue.Latitude, ue.Longitude, ue.Serving_Cell, ue.RSCP FROM ue INNER ' at line 1

Answer 1

You try to execute 2 queries at once. You can only execute one at a time.
SELECT ue.id, ue.Latitude, ue.Longitude, ue.Serving_Cell, ue.RSCP
FROM ue INNER JOIN(
SELECT id
from (
SELECT #row \\:=#row+1 as rownum, id
from (
select id, #row
from ue, (select #row := -1) r
order by id) as sorted
)as ranked
where rownum %20=0) as subset
on subset.id = ue.id
where Operator like :operator
But you can use a subquery to initialize a variable like this
(select #row := -1) r