如何执行 MySQL sql '开始...结束;' 使用 JDBC

Question

I'm using Mysql 5.7 and JDBC, I need to run below query and get result data using JDBC:

set @rownum := 0;
select *
from (select *, @rownum := @rownum + 1 as rownum from test) t
where t.rownum >= 1
  and t.rownum <= 10;

table structure and init sql:

create table test(id int, name varchar(16));
insert into test(id, name) VALUES (1,'rollsbean');

I tried executeQuery() and conn.prepareCall() and run failed.

My test code:

public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        try {
            conn = DriverManager.getConnection("jdbc:mysql://172.16.100.115:3306/valid?user=drpeco&password=DT@Stack#123&serverTimezone=UTC&characterEncoding=UTF-8&useSSL=false");
            String plsql = "set @rownum := 0;\n" +
                    "select *\n" +
                    "from (select *, @rownum := @rownum + 1 as rownum from test) t\n" +
                    "where t.rownum >= 1\n" +
                    "  and t.rownum <= 10;";
            CallableStatement cstmt = conn.prepareCall(plsql1);
            cstmt.execute();
            Object object = cstmt.getObject(1);
//            testExecute();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
                if (conn != null) {
                    conn.close();
                }

            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }

stmt = conn.createStatement();
            String plsql = "set @rownum := 0;\n" +
                    "select *\n" +
                    "from (select *, @rownum := @rownum + 1 as rownum from test) t\n" +
                    "where t.rownum >= 1\n" +
                    "  and t.rownum <= 10;";
            rs = stmt.executeQuery(plsql);
            while (rs.next()) {
                Object object = rs.getObject(1);
            }

What i want: I want to do paging query using MySQL custom variable, mysql 5.7 don't support row_number() over () .

Question: how to execute these query and get resulte data using JDBC.

Additional: the target table i searched don't have specific columns and index, if i use limit to do paging query. the efficiency will very low in deep pages, so i want to try row_number , if anyone have better solution to query, please share with me, i will very happy for your answer.

My Requirement: as i said in the Additional, my app will run sql jobs and generate many template table with data, the data is depend on the sql, and we can download all the data from one specific template table without any conditions, in this step, i will do paging query to read
data.

Answer 1

Use LIMIT with two parameters. For example, to return results 11-60 (where result 1 is the first row), use:

SELECT * FROM foo LIMIT 10, 50

For more details look here

Answer 2

Why dont you use OFFSET. I believe this would help you.

SELECT id, name FROM any_table LIMIT 15000 OFFSET 15000