Java Spring JDBC last_insert_id（）

Question

I have a web service and a database(MySQL), I made a table called batch which must generate each time I add some value, an unique key.

CREATE TABLE batch (
    id INT AUTO_INCREMENT PRIMARY KEY,
    description VARCHAR(250) NOT NULL
);

This is the code for the database table and here you are what I wrote so far:

static final String addBatchIdSql = "INSERT INTO batch" + "(description)" + "VALUES (?)";
static final String getBatchIdSql = "SELECT LAST_INSERT_ID()";

    @Override
        public int getBatchId() {
            DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            String batchIDcreation = dateFormat.format(new Date());
            jdbcTemplate.update(addBatchIdSql, batchIDcreation);
            SqlRowSet rowSet = jdbcTemplate.queryForRowSet(getBatchIdSql);
            while (rowSet.next()) {
                System.out.println(rowSet.findColumn("id"));
            }
            return 0;
        }

The problem is that each time I try to get the id it throws exception which states "invalid column name", I have checked the naming properties in my application in general and could not find any issue, what could be wrong here ://

Answer 1

You can try aliasing the column which is returned from your application's call to LAST_INSERT_ID() :

static final String getBatchIdSql = "SELECT LAST_INSERT_ID() AS id";

Full code:

static final String addBatchIdSql = "INSERT INTO batch" + "(description)" + "VALUES (?)";
static final String getBatchIdSql = "SELECT LAST_INSERT_ID() AS id";

@Override
public int getBatchId() {
    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String batchIDcreation = dateFormat.format(new Date());
    jdbcTemplate.update(addBatchIdSql, batchIDcreation);
    SqlRowSet rowSet = jdbcTemplate.queryForRowSet(getBatchIdSql);
    if (rowSet.next()) {
        System.out.println(rowSet.findColumn("id"));
    }
    return 0;
}

Answer 2

Try this because, your id as auto increment, so last insert id is your max id

 static final String getBatchIdSql = "SELECT MAX(id) AS id FROM batch"; 

Total Code:

static final String addBatchIdSql = "INSERT INTO batch" + "(description)" + "VALUES (?)";
 static final String getBatchIdSql = "SELECT MAX(id) AS id FROM batch";

                @Override
                public int getBatchId() {
                    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    String batchIDcreation = dateFormat.format(new Date());
                    jdbcTemplate.update(addBatchIdSql, batchIDcreation);
                    SqlRowSet rowSet = jdbcTemplate.queryForRowSet(getBatchIdSql);
                    if (rowSet.next()) {
                        System.out.println(rowSet.findColumn("id"));
                    }
                    return 0;


}