/**
* Maps the given <code>ResultSet</code> column label to its
* <code>ResultSet</code> column index.
*
* @param columnLabel the label for the column specified with the SQL AS clause. If the SQL AS clause was not specified, then the label is the name of the column
* @return the column index of the given column name
* @exception SQLException if the <code>ResultSet</code> object
* does not contain a column labeled <code>columnLabel</code>, a database access error occurs
* or this method is called on a closed result set
*/
int findColumn(String columnLabel) throws SQLException;
