[raz]

You should use a display method on EmplTable and show this method in grid.

display field1_EDT myfield1(EmplTable _emplTable)
{
    field1_EDT   field1;
    ;
    if (<smth>)
    {
       select firstOnly axtable_1
          where axtable_1.periodFromDate <= _emplTable.<smth>
              && axtable_1.periodToDate >= _emplTable.<smth>;

       if (axtable_1)
          field1 = axtable_1.description;
    }
    else
    {
          field1 = smth;
    }

    return field1;
}