* @return true if the {@link #setLong(int, String, long)} method can
* safely be used for the given field, false otherwise.
*/
public final boolean canSetLong(String field) {
Column col = getColumn(field);
return ( col==null ? false : col.canSetLong() );
}
/**
* Get the data value at the given row and field as a
* <code>long</code>.