public override AlgebraNode VisitJoinAlgebraNode(JoinAlgebraNode node)
{
base.VisitJoinAlgebraNode(node);
if (node.Op == JoinAlgebraNode.JoinOperator.FullOuterJoin)
{
// TODO: Check if we could represent this join condition by an hash match operator
JoinAlgebraNode leftOuterJoinNode = new JoinAlgebraNode();
leftOuterJoinNode.Op = JoinAlgebraNode.JoinOperator.LeftOuterJoin;
leftOuterJoinNode.Predicate = (ExpressionNode)node.Predicate.Clone();
leftOuterJoinNode.Left = (AlgebraNode) node.Left.Clone();
leftOuterJoinNode.Right = (AlgebraNode) node.Right.Clone();
leftOuterJoinNode.OutputList = ArrayHelpers.Clone(node.OutputList);
List<RowBufferEntry> swappedOutputList = new List<RowBufferEntry>();
swappedOutputList.AddRange(node.Right.OutputList);
swappedOutputList.AddRange(node.Left.OutputList);
JoinAlgebraNode leftAntiSemiJoinNode = new JoinAlgebraNode();
leftAntiSemiJoinNode.Op = JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin;
leftAntiSemiJoinNode.Predicate = (ExpressionNode) node.Predicate.Clone();
leftAntiSemiJoinNode.Left = (AlgebraNode) node.Right.Clone();
leftAntiSemiJoinNode.Right = (AlgebraNode) node.Left.Clone();
leftAntiSemiJoinNode.OutputList = swappedOutputList.ToArray();
List<ComputedValueDefinition> computeScalareDefinedValues = new List<ComputedValueDefinition>();
foreach (RowBufferEntry rowBufferEntry in node.Left.OutputList)
{
ComputedValueDefinition definedValue = new ComputedValueDefinition();
definedValue.Target = rowBufferEntry;
definedValue.Expression = LiteralExpression.FromTypedNull(rowBufferEntry.DataType);
computeScalareDefinedValues.Add(definedValue);
}
ComputeScalarAlgebraNode computeScalarNode = new ComputeScalarAlgebraNode();
computeScalarNode.Input = leftAntiSemiJoinNode;
computeScalarNode.DefinedValues = computeScalareDefinedValues.ToArray();
computeScalarNode.OutputList = swappedOutputList.ToArray();
List<UnitedValueDefinition> concatDefinedValues = new List<UnitedValueDefinition>();
for (int i = 0; i < node.OutputList.Length; i++)
{
RowBufferEntry rowBufferEntry = node.OutputList[i];
UnitedValueDefinition concatDefinedValue = new UnitedValueDefinition();
concatDefinedValue.Target = rowBufferEntry;
concatDefinedValue.DependendEntries = new RowBufferEntry[] { node.OutputList[i], node.OutputList[i] };
concatDefinedValues.Add(concatDefinedValue);
}
ConcatAlgebraNode concatenationNode = new ConcatAlgebraNode();
concatenationNode.Inputs = new AlgebraNode[] {leftOuterJoinNode, computeScalarNode};
concatenationNode.DefinedValues = concatDefinedValues.ToArray();
concatenationNode.OutputList = swappedOutputList.ToArray();
return concatenationNode;
}
return node;
}
public override AstElement Clone(Dictionary<AstElement, AstElement> alreadyClonedElements)
{
UnitedValueDefinition result = new UnitedValueDefinition();
result.Target = Target;
result.DependendEntries = ArrayHelpers.Clone(_dependendEntries);
return result;
}
public override AlgebraNode VisitJoinAlgebraNode(JoinAlgebraNode node)
{
base.VisitJoinAlgebraNode(node);
if (node.Op == JoinAlgebraNode.JoinOperator.FullOuterJoin)
{
// TODO: Check if we could represent this join condition by an hash match operator
JoinAlgebraNode leftOuterJoinNode = new JoinAlgebraNode();
leftOuterJoinNode.Op = JoinAlgebraNode.JoinOperator.LeftOuterJoin;
leftOuterJoinNode.Predicate = (ExpressionNode)node.Predicate.Clone();
leftOuterJoinNode.Left = (AlgebraNode)node.Left.Clone();
leftOuterJoinNode.Right = (AlgebraNode)node.Right.Clone();
leftOuterJoinNode.OutputList = ArrayHelpers.Clone(node.OutputList);
List <RowBufferEntry> swappedOutputList = new List <RowBufferEntry>();
swappedOutputList.AddRange(node.Right.OutputList);
swappedOutputList.AddRange(node.Left.OutputList);
JoinAlgebraNode leftAntiSemiJoinNode = new JoinAlgebraNode();
leftAntiSemiJoinNode.Op = JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin;
leftAntiSemiJoinNode.Predicate = (ExpressionNode)node.Predicate.Clone();
leftAntiSemiJoinNode.Left = (AlgebraNode)node.Right.Clone();
leftAntiSemiJoinNode.Right = (AlgebraNode)node.Left.Clone();
leftAntiSemiJoinNode.OutputList = swappedOutputList.ToArray();
List <ComputedValueDefinition> computeScalareDefinedValues = new List <ComputedValueDefinition>();
foreach (RowBufferEntry rowBufferEntry in node.Left.OutputList)
{
ComputedValueDefinition definedValue = new ComputedValueDefinition();
definedValue.Target = rowBufferEntry;
definedValue.Expression = LiteralExpression.FromTypedNull(rowBufferEntry.DataType);
computeScalareDefinedValues.Add(definedValue);
}
ComputeScalarAlgebraNode computeScalarNode = new ComputeScalarAlgebraNode();
computeScalarNode.Input = leftAntiSemiJoinNode;
computeScalarNode.DefinedValues = computeScalareDefinedValues.ToArray();
computeScalarNode.OutputList = swappedOutputList.ToArray();
List <UnitedValueDefinition> concatDefinedValues = new List <UnitedValueDefinition>();
for (int i = 0; i < node.OutputList.Length; i++)
{
RowBufferEntry rowBufferEntry = node.OutputList[i];
UnitedValueDefinition concatDefinedValue = new UnitedValueDefinition();
concatDefinedValue.Target = rowBufferEntry;
concatDefinedValue.DependendEntries = new RowBufferEntry[] { node.OutputList[i], node.OutputList[i] };
concatDefinedValues.Add(concatDefinedValue);
}
ConcatAlgebraNode concatenationNode = new ConcatAlgebraNode();
concatenationNode.Inputs = new AlgebraNode[] { leftOuterJoinNode, computeScalarNode };
concatenationNode.DefinedValues = concatDefinedValues.ToArray();
concatenationNode.OutputList = swappedOutputList.ToArray();
return(concatenationNode);
}
return(node);
}
public override AstElement Clone(Dictionary <AstElement, AstElement> alreadyClonedElements)
{
UnitedValueDefinition result = new UnitedValueDefinition();
result.Target = Target;
result.DependendEntries = ArrayHelpers.Clone(_dependendEntries);
return(result);
}
public override AlgebraNode VisitJoinAlgebraNode(JoinAlgebraNode node)
{
node.Left = VisitAlgebraNode(node.Left);
node.Right = VisitAlgebraNode(node.Right);
bool leftIsNull = node.Left is NullScanAlgebraNode;
bool rightIsNull = node.Right is NullScanAlgebraNode;
bool joinConditionAlwaysFalse = false;
if (node.Predicate != null)
{
ExpressionNode predicate = node.Predicate;
ConstantExpression predicateAsConstant = predicate as ConstantExpression;
if (predicateAsConstant != null)
{
if (predicateAsConstant.AsBoolean)
node.Predicate = null;
else
joinConditionAlwaysFalse = true;
}
}
if (node.Op == JoinAlgebraNode.JoinOperator.RightOuterJoin ||
node.Op == JoinAlgebraNode.JoinOperator.RightSemiJoin ||
node.Op == JoinAlgebraNode.JoinOperator.RightAntiSemiJoin)
{
node.SwapSides();
}
switch (node.Op)
{
case JoinAlgebraNode.JoinOperator.InnerJoin:
if (joinConditionAlwaysFalse || leftIsNull || rightIsNull)
return CreateNullScan(node.OutputList);
break;
case JoinAlgebraNode.JoinOperator.FullOuterJoin:
if (leftIsNull && rightIsNull)
return CreateNullScan(node.OutputList);
if (leftIsNull)
return PadRightWithNullsOnLeftSide(node, RowBufferCreationMode.KeepExisting);
if (rightIsNull)
return PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.KeepExisting);
if (joinConditionAlwaysFalse)
{
AlgebraNode left = PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.CreateNew);
AlgebraNode right = PadRightWithNullsOnLeftSide(node, RowBufferCreationMode.CreateNew);
ConcatAlgebraNode concatAlgebraNode = new ConcatAlgebraNode();
concatAlgebraNode.Inputs = new AlgebraNode[] { left, right };
List<RowBufferEntry> outputList = new List<RowBufferEntry>();
List<UnitedValueDefinition> definedValues = new List<UnitedValueDefinition>();
for (int i = 0; i < node.Left.OutputList.Length; i++)
{
int leftIndex = i;
int rightIndex = node.Right.OutputList.Length + i;
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = node.Left.OutputList[leftIndex];
definedValue.DependendEntries = new RowBufferEntry[] { left.OutputList[leftIndex], right.OutputList[rightIndex] };
definedValues.Add(definedValue);
outputList.Add(definedValue.Target);
}
for (int i = 0; i < node.Right.OutputList.Length; i++)
{
int leftIndex = node.Left.OutputList.Length + i;
int rightIndex = i;
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = node.Right.OutputList[rightIndex];
definedValue.DependendEntries = new RowBufferEntry[] { left.OutputList[leftIndex], right.OutputList[rightIndex] };
definedValues.Add(definedValue);
outputList.Add(definedValue.Target);
}
concatAlgebraNode.DefinedValues = definedValues.ToArray();
concatAlgebraNode.OutputList = outputList.ToArray();
return concatAlgebraNode;
}
break;
case JoinAlgebraNode.JoinOperator.LeftOuterJoin:
if (leftIsNull)
return CreateNullScan(node.OutputList);
if (rightIsNull || joinConditionAlwaysFalse)
return PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.KeepExisting);
break;
case JoinAlgebraNode.JoinOperator.LeftSemiJoin:
if (leftIsNull || rightIsNull || joinConditionAlwaysFalse)
return CreateNullScan(node.OutputList);
if (node.Predicate == null && AstUtil.WillProduceAtLeastOneRow(node.Right))
return node.Left;
break;
case JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin:
if (leftIsNull)
return CreateNullScan(node.OutputList);
if (rightIsNull || joinConditionAlwaysFalse)
return node.Left;
if (node.Predicate == null && AstUtil.WillProduceAtLeastOneRow(node.Right))
return CreateNullScan(node.OutputList);
break;
}
return node;
}
public override AlgebraNode VisitJoinAlgebraNode(JoinAlgebraNode node)
{
node.Left = VisitAlgebraNode(node.Left);
node.Right = VisitAlgebraNode(node.Right);
bool leftIsNull = node.Left is NullScanAlgebraNode;
bool rightIsNull = node.Right is NullScanAlgebraNode;
bool joinConditionAlwaysFalse = false;
if (node.Predicate != null)
{
ExpressionNode predicate = node.Predicate;
ConstantExpression predicateAsConstant = predicate as ConstantExpression;
if (predicateAsConstant != null)
{
if (predicateAsConstant.AsBoolean)
{
node.Predicate = null;
}
else
{
joinConditionAlwaysFalse = true;
}
}
}
if (node.Op == JoinAlgebraNode.JoinOperator.RightOuterJoin ||
node.Op == JoinAlgebraNode.JoinOperator.RightSemiJoin ||
node.Op == JoinAlgebraNode.JoinOperator.RightAntiSemiJoin)
{
node.SwapSides();
}
switch (node.Op)
{
case JoinAlgebraNode.JoinOperator.InnerJoin:
if (joinConditionAlwaysFalse || leftIsNull || rightIsNull)
{
return(CreateNullScan(node.OutputList));
}
break;
case JoinAlgebraNode.JoinOperator.FullOuterJoin:
if (leftIsNull && rightIsNull)
{
return(CreateNullScan(node.OutputList));
}
if (leftIsNull)
{
return(PadRightWithNullsOnLeftSide(node, RowBufferCreationMode.KeepExisting));
}
if (rightIsNull)
{
return(PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.KeepExisting));
}
if (joinConditionAlwaysFalse)
{
AlgebraNode left = PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.CreateNew);
AlgebraNode right = PadRightWithNullsOnLeftSide(node, RowBufferCreationMode.CreateNew);
ConcatAlgebraNode concatAlgebraNode = new ConcatAlgebraNode();
concatAlgebraNode.Inputs = new AlgebraNode[] { left, right };
List <RowBufferEntry> outputList = new List <RowBufferEntry>();
List <UnitedValueDefinition> definedValues = new List <UnitedValueDefinition>();
for (int i = 0; i < node.Left.OutputList.Length; i++)
{
int leftIndex = i;
int rightIndex = node.Right.OutputList.Length + i;
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = node.Left.OutputList[leftIndex];
definedValue.DependendEntries = new RowBufferEntry[] { left.OutputList[leftIndex], right.OutputList[rightIndex] };
definedValues.Add(definedValue);
outputList.Add(definedValue.Target);
}
for (int i = 0; i < node.Right.OutputList.Length; i++)
{
int leftIndex = node.Left.OutputList.Length + i;
int rightIndex = i;
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = node.Right.OutputList[rightIndex];
definedValue.DependendEntries = new RowBufferEntry[] { left.OutputList[leftIndex], right.OutputList[rightIndex] };
definedValues.Add(definedValue);
outputList.Add(definedValue.Target);
}
concatAlgebraNode.DefinedValues = definedValues.ToArray();
concatAlgebraNode.OutputList = outputList.ToArray();
return(concatAlgebraNode);
}
break;
case JoinAlgebraNode.JoinOperator.LeftOuterJoin:
if (leftIsNull)
{
return(CreateNullScan(node.OutputList));
}
if (rightIsNull || joinConditionAlwaysFalse)
{
return(PadLeftWithNullsOnRightSide(node, RowBufferCreationMode.KeepExisting));
}
break;
case JoinAlgebraNode.JoinOperator.LeftSemiJoin:
if (leftIsNull || rightIsNull || joinConditionAlwaysFalse)
{
return(CreateNullScan(node.OutputList));
}
if (node.Predicate == null && AstUtil.WillProduceAtLeastOneRow(node.Right))
{
return(node.Left);
}
break;
case JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin:
if (leftIsNull)
{
return(CreateNullScan(node.OutputList));
}
if (rightIsNull || joinConditionAlwaysFalse)
{
return(node.Left);
}
if (node.Predicate == null && AstUtil.WillProduceAtLeastOneRow(node.Right))
{
return(CreateNullScan(node.OutputList));
}
break;
}
return(node);
}
public override AlgebraNode VisitConcatAlgebraNode(ConcatAlgebraNode node)
{
base.VisitConcatAlgebraNode(node);
List <AlgebraNode> nonEmptyInputs = new List <AlgebraNode>();
foreach (AlgebraNode input in node.Inputs)
{
if (input is NullScanAlgebraNode)
{
// removed by not adding to list.
}
else
{
nonEmptyInputs.Add(input);
}
}
if (nonEmptyInputs.Count == 0)
{
return(CreateNullScan(node.OutputList));
}
if (nonEmptyInputs.Count == 1)
{
int inputIndex = Array.IndexOf(node.Inputs, nonEmptyInputs[0]);
List <ComputedValueDefinition> definedValues = new List <ComputedValueDefinition>();
ComputeScalarAlgebraNode computeScalarAlgebraNode = new ComputeScalarAlgebraNode();
computeScalarAlgebraNode.Input = nonEmptyInputs[0];
foreach (UnitedValueDefinition unitedValueDefinition in node.DefinedValues)
{
ComputedValueDefinition computedValueDefinition = new ComputedValueDefinition();
computedValueDefinition.Target = unitedValueDefinition.Target;
computedValueDefinition.Expression = new RowBufferEntryExpression(unitedValueDefinition.DependendEntries[inputIndex]);
definedValues.Add(computedValueDefinition);
}
computeScalarAlgebraNode.DefinedValues = definedValues.ToArray();
computeScalarAlgebraNode.OutputList = node.OutputList;
return(computeScalarAlgebraNode);
}
node.Inputs = nonEmptyInputs.ToArray();
// Update dependend entries
for (int i = 0; i < node.DefinedValues.Length; i++)
{
UnitedValueDefinition definition = node.DefinedValues[i];
List <RowBufferEntry> dependendEntries = new List <RowBufferEntry>();
foreach (RowBufferEntry dependendEntry in definition.DependendEntries)
{
bool entryInAnyInput = false;
foreach (AlgebraNode input in node.Inputs)
{
if (ArrayHelpers.Contains(input.OutputList, dependendEntry))
{
entryInAnyInput = true;
break;
}
}
if (entryInAnyInput)
{
dependendEntries.Add(dependendEntry);
}
}
definition.DependendEntries = dependendEntries.ToArray();
}
return(node);
}
public override QueryNode VisitBinaryQuery(BinaryQuery query)
{
switch (query.Op)
{
case BinaryQueryOperator.Intersect:
case BinaryQueryOperator.Except:
{
ResultAlgebraNode left = ((ResultAlgebraNode)ConvertAstNode(query.Left));
ResultAlgebraNode right = ((ResultAlgebraNode)ConvertAstNode(query.Right));
// Create distinct sort
SortAlgebraNode sortAlgebraNode = new SortAlgebraNode();
sortAlgebraNode.Distinct = true;
sortAlgebraNode.Input = left;
sortAlgebraNode.SortEntries = left.OutputList;
sortAlgebraNode.SortOrders = CreateAscendingSortOrders(sortAlgebraNode.SortEntries.Length);
// Insert left (anti) semi join to (except) intersect left and right.
ExpressionBuilder expressionBuilder = new ExpressionBuilder();
for (int i = 0; i < left.OutputList.Length; i++)
{
RowBufferEntryExpression leftExpr = new RowBufferEntryExpression();
leftExpr.RowBufferEntry = left.OutputList[i];
RowBufferEntryExpression rightExpr = new RowBufferEntryExpression();
rightExpr.RowBufferEntry = right.OutputList[i];
expressionBuilder.Push(leftExpr);
expressionBuilder.Push(rightExpr);
expressionBuilder.PushBinary(BinaryOperator.Equal);
expressionBuilder.Push(leftExpr);
expressionBuilder.PushIsNull();
expressionBuilder.Push(rightExpr);
expressionBuilder.PushIsNull();
expressionBuilder.PushBinary(BinaryOperator.LogicalAnd);
expressionBuilder.PushBinary(BinaryOperator.LogicalOr);
}
expressionBuilder.PushNAry(LogicalOperator.And);
ExpressionNode joinCondition = expressionBuilder.Pop();
JoinAlgebraNode joinAlgebraNode = new JoinAlgebraNode();
if (query.Op == BinaryQueryOperator.Intersect)
{
joinAlgebraNode.Op = JoinAlgebraNode.JoinOperator.LeftSemiJoin;
}
else
{
joinAlgebraNode.Op = JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin;
}
joinAlgebraNode.Left = sortAlgebraNode;
joinAlgebraNode.Right = right;
joinAlgebraNode.Predicate = joinCondition;
SetLastAlgebraNode(joinAlgebraNode);
ResultAlgebraNode resultAlgebraNode = new ResultAlgebraNode();
resultAlgebraNode.Input = GetLastAlgebraNode();
resultAlgebraNode.OutputList = left.OutputList;
resultAlgebraNode.ColumnNames = left.ColumnNames;
SetLastAlgebraNode(resultAlgebraNode);
break;
}
case BinaryQueryOperator.Union:
case BinaryQueryOperator.UnionAll:
{
// Build a flat list with all inputs.
List <QueryNode> inputList = AstUtil.FlattenBinaryQuery(query);
AlgebraNode[] inputs = new AlgebraNode[inputList.Count];
for (int i = 0; i < inputs.Length; i++)
{
inputs[i] = ConvertAstNode(inputList[i]);
}
int outputColumnCount = inputs[0].OutputList.Length;
UnitedValueDefinition[] definedValues = new UnitedValueDefinition[outputColumnCount];
List <RowBufferEntry> definedValueEntries = new List <RowBufferEntry>();
for (int i = 0; i < outputColumnCount; i++)
{
RowBufferEntry rowBufferEntry = new RowBufferEntry(inputs[0].OutputList[i].DataType);
definedValueEntries.Add(rowBufferEntry);
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = rowBufferEntry;
List <RowBufferEntry> dependencies = new List <RowBufferEntry>();
foreach (ResultAlgebraNode node in inputs)
{
dependencies.Add(node.OutputList[i]);
}
definedValue.DependendEntries = dependencies.ToArray();
definedValues[i] = definedValue;
}
ConcatAlgebraNode concatAlgebraNode = new ConcatAlgebraNode();
concatAlgebraNode.Inputs = inputs;
concatAlgebraNode.DefinedValues = definedValues;
SetLastAlgebraNode(concatAlgebraNode);
if (query.Op == BinaryQueryOperator.Union)
{
SortAlgebraNode sortAlgebraNode = new SortAlgebraNode();
sortAlgebraNode.Distinct = true;
sortAlgebraNode.Input = GetLastAlgebraNode();
sortAlgebraNode.SortEntries = definedValueEntries.ToArray();
sortAlgebraNode.SortOrders = CreateAscendingSortOrders(sortAlgebraNode.SortEntries.Length);
SetLastAlgebraNode(sortAlgebraNode);
}
ResultAlgebraNode unionResultAlgebraNode = new ResultAlgebraNode();
unionResultAlgebraNode.Input = GetLastAlgebraNode();
unionResultAlgebraNode.ColumnNames = ((ResultAlgebraNode)inputs[0]).ColumnNames;
unionResultAlgebraNode.OutputList = definedValueEntries.ToArray();
SetLastAlgebraNode(unionResultAlgebraNode);
break;
}
}
return(query);
}
public ConcatRowBufferEntryReplacer(UnitedValueDefinition[] unitedValues, int inputIndex)
{
_unitedValues = unitedValues;
_inputIndex = inputIndex;
}
public override QueryNode VisitBinaryQuery(BinaryQuery query)
{
switch (query.Op)
{
case BinaryQueryOperator.Intersect:
case BinaryQueryOperator.Except:
{
ResultAlgebraNode left = ((ResultAlgebraNode)ConvertAstNode(query.Left));
ResultAlgebraNode right = ((ResultAlgebraNode)ConvertAstNode(query.Right));
// Create distinct sort
SortAlgebraNode sortAlgebraNode = new SortAlgebraNode();
sortAlgebraNode.Distinct = true;
sortAlgebraNode.Input = left;
sortAlgebraNode.SortEntries = left.OutputList;
sortAlgebraNode.SortOrders = CreateAscendingSortOrders(sortAlgebraNode.SortEntries.Length);
// Insert left (anti) semi join to (except) intersect left and right.
ExpressionBuilder expressionBuilder = new ExpressionBuilder();
for (int i = 0; i < left.OutputList.Length; i++)
{
RowBufferEntryExpression leftExpr = new RowBufferEntryExpression();
leftExpr.RowBufferEntry = left.OutputList[i];
RowBufferEntryExpression rightExpr = new RowBufferEntryExpression();
rightExpr.RowBufferEntry = right.OutputList[i];
expressionBuilder.Push(leftExpr);
expressionBuilder.Push(rightExpr);
expressionBuilder.PushBinary(BinaryOperator.Equal);
expressionBuilder.Push(leftExpr);
expressionBuilder.PushIsNull();
expressionBuilder.Push(rightExpr);
expressionBuilder.PushIsNull();
expressionBuilder.PushBinary(BinaryOperator.LogicalAnd);
expressionBuilder.PushBinary(BinaryOperator.LogicalOr);
}
expressionBuilder.PushNAry(LogicalOperator.And);
ExpressionNode joinCondition = expressionBuilder.Pop();
JoinAlgebraNode joinAlgebraNode = new JoinAlgebraNode();
if (query.Op == BinaryQueryOperator.Intersect)
joinAlgebraNode.Op = JoinAlgebraNode.JoinOperator.LeftSemiJoin;
else
joinAlgebraNode.Op = JoinAlgebraNode.JoinOperator.LeftAntiSemiJoin;
joinAlgebraNode.Left = sortAlgebraNode;
joinAlgebraNode.Right = right;
joinAlgebraNode.Predicate = joinCondition;
SetLastAlgebraNode(joinAlgebraNode);
ResultAlgebraNode resultAlgebraNode = new ResultAlgebraNode();
resultAlgebraNode.Input = GetLastAlgebraNode();
resultAlgebraNode.OutputList = left.OutputList;
resultAlgebraNode.ColumnNames = left.ColumnNames;
SetLastAlgebraNode(resultAlgebraNode);
break;
}
case BinaryQueryOperator.Union:
case BinaryQueryOperator.UnionAll:
{
// Build a flat list with all inputs.
List<QueryNode> inputList = AstUtil.FlattenBinaryQuery(query);
AlgebraNode[] inputs = new AlgebraNode[inputList.Count];
for (int i = 0; i < inputs.Length; i++)
inputs[i] = ConvertAstNode(inputList[i]);
int outputColumnCount = inputs[0].OutputList.Length;
UnitedValueDefinition[] definedValues = new UnitedValueDefinition[outputColumnCount];
List<RowBufferEntry> definedValueEntries = new List<RowBufferEntry>();
for (int i = 0; i < outputColumnCount; i++)
{
RowBufferEntry rowBufferEntry = new RowBufferEntry(inputs[0].OutputList[i].DataType);
definedValueEntries.Add(rowBufferEntry);
UnitedValueDefinition definedValue = new UnitedValueDefinition();
definedValue.Target = rowBufferEntry;
List<RowBufferEntry> dependencies = new List<RowBufferEntry>();
foreach (ResultAlgebraNode node in inputs)
dependencies.Add(node.OutputList[i]);
definedValue.DependendEntries = dependencies.ToArray();
definedValues[i] = definedValue;
}
ConcatAlgebraNode concatAlgebraNode = new ConcatAlgebraNode();
concatAlgebraNode.Inputs = inputs;
concatAlgebraNode.DefinedValues = definedValues;
SetLastAlgebraNode(concatAlgebraNode);
if (query.Op == BinaryQueryOperator.Union)
{
SortAlgebraNode sortAlgebraNode = new SortAlgebraNode();
sortAlgebraNode.Distinct = true;
sortAlgebraNode.Input = GetLastAlgebraNode();
sortAlgebraNode.SortEntries = definedValueEntries.ToArray();
sortAlgebraNode.SortOrders = CreateAscendingSortOrders(sortAlgebraNode.SortEntries.Length);
SetLastAlgebraNode(sortAlgebraNode);
}
ResultAlgebraNode unionResultAlgebraNode = new ResultAlgebraNode();
unionResultAlgebraNode.Input = GetLastAlgebraNode();
unionResultAlgebraNode.ColumnNames = ((ResultAlgebraNode)inputs[0]).ColumnNames;
unionResultAlgebraNode.OutputList = definedValueEntries.ToArray();
SetLastAlgebraNode(unionResultAlgebraNode);
break;
}
}
return query;
}
