Inserting data into multiple tables with spring jdbcTemplate [closed]

Question

I am working to insert n number of records into two tables with using java, spring jdbc template. some like this

assume daos.xml correctly configured.

ApplicationContext ctxt = new ClassPathXmlApplicationContext("daos.xml");
JdbcTemplate template = (JdbcTemplate) ctxt.getBean("jdbcTemplate");

final List<Person> list = new ArrayList<>();
        final List<Role> roles = new ArrayList<>();
        for(int i =1; i<=100; i++){
            Person item = new Person();
            item.setFirstName("Naveen" + i);
            item.setLastName("kumar" + i);
            item.setDescription("D" + i);
            list.add(item);

            Role role = new Role();
            role.setName("Admin");
            role.setCode("c"  + i);
            roles.add(role);

        }

String sql = "insert into person(first_name, last_name, description) values(?,?,?)";

            int[] arr = template.batchUpdate(sql, new BatchPreparedStatementSetter() {

                        @Override
                        public void setValues(PreparedStatement ps, int i) throws SQLException                             {
                            Person person = list.get(i);
                            ps.setObject(1, person.getFirstName());
                            ps.setObject(2, person.getLastName());
                            ps.setObject(3, person.getDescription());
                        }

                        @Override
                        public int getBatchSize() {
                            return list.size()
                        }
                    });

I am also configured Transaction Manager.

So my question is how can i insert data into both person and role table using batch. Because Person can have role. when i insert into person it require role id to be insert together. In this case person insertion query will looks like this.

String sql = "insert into person(first_name, last_name, description, role_id) values(?,?,?, ?)";

I want to perform it into batch batch. because in my case i have min 10k person list to parse using file. So it can be a performance killer i insert role into table than get it and they insert person again.

Answer 1

You can use multilane statements and LAST_INSERT_ID() MySql function:

String sql = "insert into role(name, code) values(?,?);" +
    "insert into person(first_name, last_name, description, role_id) values(?,?,?,(SELECT LAST_INSERT_ID()));";

int[] arr = template.batchUpdate(sql, new BatchPreparedStatementSetter() {

    @Override
    public void setValues(PreparedStatement ps, int i) throws SQLException {
        Role role = roles.get(i);
        Person person = list.get(i);
        ps.setObject(1, role.getName());
        ps.setObject(2, role.getCode();
        ps.setObject(3, person.getFirstName());
        ps.setObject(4, person.getLastName());
        ps.setObject(5, person.getDescription());
    }

    @Override
    public int getBatchSize() {
        return list.size()
    }
});