Question

I am trying to execute following code. Connection is being built successfully.

String selectq = "select max(id) as max_id from items";
currentCon = (Connection) ConnectionManager.getConnection();
            stmt=(Statement) currentCon.createStatement();
ResultSet rSelect = stmt.executeQuery(selectq);

On executing following command, output is coming as 1 even if there is no row in the table.

rSelect.next();
System.out.println(rSelect.getRow());

My requirement is to check if there are no records in the table, otherwise I need to get the max of id column from that table.

I have tried many things like

rSelect.last();
rSelect.next();

But, I am not able to get the required result.

I am using

• Eclipse Indigo 3.7
• JDK 1.6.0_37
• Tomcat 7
• MySQL

Answer 1

It worked after adding a If statement like below:

String id = "";


if(rSelect.next()){
    id = rSelect.getString(1);
}

Since, there can exists only one row or nothing according to my query.