/// <summary>
/// Copies a group by into node
/// </summary>
/// <param name="op">The Op to Copy</param>
/// <param name="n">The Node that references the Op</param>
/// <returns>A copy of the original Node that references a copy of the original Op</returns>
public override Node Visit(GroupByIntoOp op, Node n)
{
// Visit the Node's children and map their Vars
List <Node> children = ProcessChildren(n);
// Create a new GroupByOp that uses copies of the Key and Output VarSets of the original GroupByOp
GroupByIntoOp newGroupOp = m_destCmd.CreateGroupByIntoOp(Copy(op.Keys), Copy(op.Inputs), Copy(op.Outputs));
// Return a new Node that references the copied GroupByOp and has the copied child Nodes as its children
return(m_destCmd.CreateNode(newGroupOp, children));
}
public override void Visit(GroupByIntoOp op, Node n)
{
VisitGroupByOp(op, n);
Assert(n.Child3.Children.Count > 0, "GroupByInto with no group aggregate vars");
}