code: protected void appendColumn(TableAlias anAlias, FieldDescriptor field, StringBuffer buf)
      {
          buf.append(anAlias.alias);
          buf.append(".");
          buf.append(field.getColumnName());
      }
docs: Append a Column with alias: A0 name -> A0.name
  @param anAlias the TableAlias
  @param field
  @param buf