private Node VisitNestOp(Node n)
{
var op = n.Op as NestBaseOp;
var ssnOp = op as SingleStreamNestOp;
Debug.Assert(op != null);
// Visit the Node's children and map their Vars
var newChildren = ProcessChildren(n);
Var newDiscriminator = null;
if (ssnOp != null)
{
newDiscriminator = GetMappedVar(ssnOp.Discriminator);
}
var newCollectionInfoList = new List <CollectionInfo>();
foreach (var ci in op.CollectionInfo)
{
var newColumnMap = Copy(ci.ColumnMap);
Var newCollectionVar = m_destCmd.CreateComputedVar(ci.CollectionVar.Type);
SetMappedVar(ci.CollectionVar, newCollectionVar);
var newFlattendElementVars = Copy(ci.FlattenedElementVars);
var newKeys = Copy(ci.Keys);
var newSortKeys = Copy(ci.SortKeys);
var newCollectionInfo = Command.CreateCollectionInfo(
newCollectionVar, newColumnMap, newFlattendElementVars, newKeys, newSortKeys, ci.DiscriminatorValue);
newCollectionInfoList.Add(newCollectionInfo);
}
var newOutputs = Copy(op.Outputs);
NestBaseOp newOp = null;
var newPrefixSortKeys = Copy(op.PrefixSortKeys);
if (ssnOp != null)
{
var newKeys = Copy(ssnOp.Keys);
// Copy the SortOp's SortKeys
var newPostfixSortKeys = Copy(ssnOp.PostfixSortKeys);
newOp = m_destCmd.CreateSingleStreamNestOp(
newKeys, newPrefixSortKeys, newPostfixSortKeys, newOutputs, newCollectionInfoList, newDiscriminator);
}
else
{
newOp = m_destCmd.CreateMultiStreamNestOp(newPrefixSortKeys, newOutputs, newCollectionInfoList);
}
return(m_destCmd.CreateNode(newOp, newChildren));
}
private Node VisitNestOp(Node n)
{
NestBaseOp op = n.Op as NestBaseOp;
SingleStreamNestOp singleStreamNestOp = op as SingleStreamNestOp;
List <Node> args = this.ProcessChildren(n);
Var discriminatorVar = (Var)null;
if (singleStreamNestOp != null)
{
discriminatorVar = this.GetMappedVar(singleStreamNestOp.Discriminator);
}
List <CollectionInfo> collectionInfoList = new List <CollectionInfo>();
foreach (CollectionInfo collectionInfo1 in op.CollectionInfo)
{
ColumnMap columnMap = this.Copy(collectionInfo1.ColumnMap);
Var computedVar = (Var)this.m_destCmd.CreateComputedVar(collectionInfo1.CollectionVar.Type);
this.SetMappedVar(collectionInfo1.CollectionVar, computedVar);
VarList flattenedElementVars = this.Copy(collectionInfo1.FlattenedElementVars);
VarVec keys = this.Copy(collectionInfo1.Keys);
List <SortKey> sortKeys = this.Copy(collectionInfo1.SortKeys);
CollectionInfo collectionInfo2 = Command.CreateCollectionInfo(computedVar, columnMap, flattenedElementVars, keys, sortKeys, collectionInfo1.DiscriminatorValue);
collectionInfoList.Add(collectionInfo2);
}
VarVec outputVars = this.Copy(op.Outputs);
List <SortKey> prefixSortKeys = this.Copy(op.PrefixSortKeys);
NestBaseOp nestBaseOp;
if (singleStreamNestOp != null)
{
VarVec keys = this.Copy(singleStreamNestOp.Keys);
List <SortKey> postfixSortKeys = this.Copy(singleStreamNestOp.PostfixSortKeys);
nestBaseOp = (NestBaseOp)this.m_destCmd.CreateSingleStreamNestOp(keys, prefixSortKeys, postfixSortKeys, outputVars, collectionInfoList, discriminatorVar);
}
else
{
nestBaseOp = (NestBaseOp)this.m_destCmd.CreateMultiStreamNestOp(prefixSortKeys, outputVars, collectionInfoList);
}
return(this.m_destCmd.CreateNode((Op)nestBaseOp, args));
}