// <summary>
// Copies a PhysicalProjectOp
// </summary>
public override Node Visit(PhysicalProjectOp op, Node n)
{
// Visit the Node's children and map their Vars
var children = ProcessChildren(n);
// Copy the ProjectOp's VarSet
var newVarList = Copy(op.Outputs);
var newColumnMap = Copy(op.ColumnMap) as SimpleCollectionColumnMap;
Debug.Assert(newColumnMap != null, "Coping of a physical project's columnMap did not return a SimpleCollectionColumnMap");
// Create a new ProjectOp based on the copied VarSet
var newProject = m_destCmd.CreatePhysicalProjectOp(newVarList, newColumnMap);
// Return a new Node that references the copied ProjectOp and has the copied child Nodes as its children
return(m_destCmd.CreateNode(newProject, children));
}
