/// <summary>
/// Добавить выражение для отбора
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public Filter Add(SubqueryExpression expression)
{
int hashCode = expression.GetHashCode();
if (!Subqueries.ContainsKey(hashCode))
{
_subqueries.Add(hashCode, expression);
}
return(((SubqueryExpression)_subqueries[hashCode]).CriteriaImpl);
}