[raz]

Для понимания работы joinChild()/joinParent()

static void Job51(Args _args)
{
    InventTable     InventTable, InventTableParent;
    InventSum       InventSum;
    int             i;
    ;
    
    while select InventTable
    join InventSum
        where InventSum.ItemId == InventTable.ItemId
    {
        i++;
        
        InventTableParent = InventSum.joinParent();
        
        print(InventTable.RecId == InventTableParent.RecId);
        
        if (i >= 10)
        {
            break;
        }
    }
}

Соответственно

display Comment(ActionDetailTable _actionDetailTable)
{
    ActionTable actionTableLocal;
    ;
    
    actionTableLocal = _actionDetailTable.joinParent();
    ....
}