java.sql.SQLException：无效的列索引

Question

I have a SQL query which I want to use to count components into table.

private DCDataObj dc;

    public class DCDataObj
    {

        private int datacenter;             //  Datacenters
        ..............

        public DCDataObj(int datacenter............)
        {
            this.datacenter = datacenter;
            ...............
        }

        public int getDatacenter()
        {
            return datacenter;
        }

        public void setDatacenter(int datacenter)
        {
            this.datacenter = datacenter;
        }

        ............
    }

ps = conn.prepareStatement("SELECT COUNT(1) AS CNT FROM COMPONENTSTATS CS, COMPONENTTYPE CT "
        + " WHERE CS.COMPONENTTYPEID = CT.COMPONENTTYPEID AND CT.COMPONENTTYPEID IN ( "
        + " ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, " //  10
        + " ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, " //  20
        + " ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, " //  30
        + " ?, ?, ?, ?, ?, ?, ?, ?, ?, ? ) " //  40
        + " GROUP BY CT.NAME ORDER BY CT.NAME");

ps.setInt(1, 1000);
...............

ResultSet result = ps.executeQuery();
            while (result.next())
            {

                dc = new DCDataObj(
                        result.getInt(1),
                        ...............

Here is the complete source code: http://pastebin.com/YMvqBPpV

I get this error message: java.sql.SQLException: Invalid column index

Is this design problem or the problem is into the SQL query?

Answer 1

I saw your full source code and you have a bunch of result.getInt(INDEX) . Since you are only doing SELECT COUNT(1) , there is only one column, so for any value of INDEX other than 1, the getInt() will fail.

Change your query to SELECT <LIST> ... where LIST is a comma separated list of column names from which you want to retrieve values.