private CqlBlock JoinToCqlBlock(
bool[] requiredSlots,
CqlIdentifiers identifiers,
ref int blockAliasNum,
ref List <WithRelationship> withRelationships)
{
int length1 = requiredSlots.Length;
List <CqlBlock> children = new List <CqlBlock>();
List <Tuple <QualifiedSlot, MemberPath> > tupleList = new List <Tuple <QualifiedSlot, MemberPath> >();
foreach (CellTreeNode child in this.Children)
{
bool[] projectedSlots = child.GetProjectedSlots();
OpCellTreeNode.AndWith(projectedSlots, requiredSlots);
CqlBlock cqlBlock = child.ToCqlBlock(projectedSlots, identifiers, ref blockAliasNum, ref withRelationships);
children.Add(cqlBlock);
for (int length2 = projectedSlots.Length; length2 < cqlBlock.Slots.Count; ++length2)
{
tupleList.Add(Tuple.Create <QualifiedSlot, MemberPath>(cqlBlock.QualifySlotWithBlockAlias(length2), cqlBlock.MemberPath(length2)));
}
}
SlotInfo[] slotInfos = new SlotInfo[length1 + tupleList.Count];
for (int slotNum = 0; slotNum < length1; ++slotNum)
{
SlotInfo joinSlotInfo = this.GetJoinSlotInfo(this.OpType, requiredSlots[slotNum], children, slotNum, identifiers);
slotInfos[slotNum] = joinSlotInfo;
}
int index1 = 0;
int index2 = length1;
while (index2 < length1 + tupleList.Count)
{
slotInfos[index2] = new SlotInfo(true, true, (ProjectedSlot)tupleList[index1].Item1, tupleList[index1].Item2);
++index2;
++index1;
}
List <JoinCqlBlock.OnClause> onClauses = new List <JoinCqlBlock.OnClause>();
for (int index3 = 1; index3 < children.Count; ++index3)
{
CqlBlock cqlBlock = children[index3];
JoinCqlBlock.OnClause onClause = new JoinCqlBlock.OnClause();
foreach (int keySlot in this.KeySlots)
{
if (!this.ViewgenContext.Config.IsValidationEnabled && (!cqlBlock.IsProjected(keySlot) || !children[0].IsProjected(keySlot)))
{
ErrorLog errorLog = new ErrorLog();
errorLog.AddEntry(new ErrorLog.Record(ViewGenErrorCode.NoJoinKeyOrFKProvidedInMapping, Strings.Viewgen_NoJoinKeyOrFK, (IEnumerable <LeftCellWrapper>) this.ViewgenContext.AllWrappersForExtent, string.Empty));
ExceptionHelpers.ThrowMappingException(errorLog, this.ViewgenContext.Config);
}
QualifiedSlot leftSlot = children[0].QualifySlotWithBlockAlias(keySlot);
QualifiedSlot rightSlot = cqlBlock.QualifySlotWithBlockAlias(keySlot);
MemberPath outputMember = slotInfos[keySlot].OutputMember;
onClause.Add(leftSlot, outputMember, rightSlot, outputMember);
}
onClauses.Add(onClause);
}
return((CqlBlock) new JoinCqlBlock(this.OpType, slotInfos, children, onClauses, identifiers, ++blockAliasNum));
}
// requires: node corresponds to an IJ, LOJ, FOJ node
// effects: Given a union node and the slots required by the parent,
// generates a CqlBlock for the subtree rooted at node
private CqlBlock JoinToCqlBlock(bool[] requiredSlots, CqlIdentifiers identifiers, ref int blockAliasNum, ref List <WithRelationship> withRelationships)
{
int totalSlots = requiredSlots.Length;
Debug.Assert(OpType == CellTreeOpType.IJ ||
OpType == CellTreeOpType.LOJ ||
OpType == CellTreeOpType.FOJ, "Only these join operations handled");
List <CqlBlock> children = new List <CqlBlock>();
List <Tuple <QualifiedSlot, MemberPath> > additionalChildSlots = new List <Tuple <QualifiedSlot, MemberPath> >();
// First get the children nodes (FROM part)
foreach (CellTreeNode child in Children)
{
// Determine the slots that are projected by this child.
// These are the required slots as well - unlike Union, we do not need the child to project any extra nulls.
bool[] childProjectedSlots = child.GetProjectedSlots();
AndWith(childProjectedSlots, requiredSlots);
CqlBlock childBlock = child.ToCqlBlock(childProjectedSlots, identifiers, ref blockAliasNum, ref withRelationships);
children.Add(childBlock);
for (int qualifiedSlotNumber = childProjectedSlots.Length; qualifiedSlotNumber < childBlock.Slots.Count; qualifiedSlotNumber++)
{
additionalChildSlots.Add(Tuple.Create(childBlock.QualifySlotWithBlockAlias(qualifiedSlotNumber), childBlock.MemberPath(qualifiedSlotNumber)));
}
Debug.Assert(totalSlots == child.NumBoolSlots + child.NumProjectedSlots,
"Number of required slots is different from what each node in the tree has?");
}
// Now get the slots that are projected out by this node (SELECT part)
SlotInfo[] slotInfos = new SlotInfo[totalSlots + additionalChildSlots.Count];
for (int slotNum = 0; slotNum < totalSlots; slotNum++)
{
// Note: this call could create a CaseStatementSlot (i.e., slotInfo.SlotValue is CaseStatementSlot)
// which uses "from" booleans that need to be projected by children
SlotInfo slotInfo = GetJoinSlotInfo(OpType, requiredSlots[slotNum], children, slotNum, identifiers);
slotInfos[slotNum] = slotInfo;
}
for (int i = 0, slotNum = totalSlots; slotNum < totalSlots + additionalChildSlots.Count; slotNum++, i++)
{
slotInfos[slotNum] = new SlotInfo(true, true, additionalChildSlots[i].Item1, additionalChildSlots[i].Item2);
}
// Generate the ON conditions: For each child, generate an ON
// clause with the 0th child on the key fields
List <JoinCqlBlock.OnClause> onClauses = new List <JoinCqlBlock.OnClause>();
for (int i = 1; i < children.Count; i++)
{
CqlBlock child = children[i];
JoinCqlBlock.OnClause onClause = new JoinCqlBlock.OnClause();
foreach (int keySlotNum in this.KeySlots)
{
if (ViewgenContext.Config.IsValidationEnabled)
{
Debug.Assert(children[0].IsProjected(keySlotNum), "Key is not in 0th child");
Debug.Assert(child.IsProjected(keySlotNum), "Key is not in child");
}
else
{
if (!child.IsProjected(keySlotNum) || !children[0].IsProjected(keySlotNum))
{
ErrorLog errorLog = new ErrorLog();
errorLog.AddEntry(new ErrorLog.Record(true, ViewGenErrorCode.NoJoinKeyOrFKProvidedInMapping,
Strings.Viewgen_NoJoinKeyOrFK, ViewgenContext.AllWrappersForExtent, String.Empty));
ExceptionHelpers.ThrowMappingException(errorLog, ViewgenContext.Config);
}
}
var firstSlot = children[0].QualifySlotWithBlockAlias(keySlotNum);
var secondSlot = child.QualifySlotWithBlockAlias(keySlotNum);
var outputMember = slotInfos[keySlotNum].OutputMember;
onClause.Add(firstSlot, outputMember, secondSlot, outputMember);
}
onClauses.Add(onClause);
}
CqlBlock result = new JoinCqlBlock(OpType, slotInfos, children, onClauses, identifiers, ++blockAliasNum);
return(result);
}
