IncorrectResultSetColumnCountException: Incorrect column count: expected 1, actual 38

Question

I am using JdbcTemplate to retrieve a Bean from the db. Here is my method:

public List  getTrackerData() {
    return List         


        

Answer 1

This is happening because, the queryForList method you have used will not support for multiple columns. See the implementation of queryForList from JdbcTemplate

public  List More ...queryForList(String sql, Object[] args, Class elementType) throws DataAccessException 
{
    return query(sql, args, getSingleColumnRowMapper(elementType));
}

The getsingleColumnRowMapper() method creates a new RowMapper for reading result objects from a single column. You can use the method given below instead.

public  List query(String sql, Object[] args, RowMapper rowMapper) throws DataAccessException        
 {
    return query(sql, args, new RowMapperResultSetExtractor(rowMapper));
}