private ColumnMap BuildResultColumnMap(PhysicalProjectOp projectOp)
{
// convert the column map into a real column map
// build up a dictionary mapping Vars to their real positions in the commands
Dictionary <Var, KeyValuePair <int, int> > varMap = BuildVarMap();
ColumnMap realColumnMap = ColumnMapTranslator.Translate(projectOp.ColumnMap, varMap);
return(realColumnMap);
}
public override void Visit(PhysicalProjectOp op, Node n)
{
VisitPhysicalOpDefault(op, n);
Map(op.Outputs);
SimpleCollectionColumnMap newColumnMap = (SimpleCollectionColumnMap)ColumnMapTranslator.Translate(op.ColumnMap, m_varMap);
n.Op = m_command.CreatePhysicalProjectOp(op.Outputs, newColumnMap);
}