private Node HandleEQ(Node n, bool negated)
{
NullSemantics nullSemantics = this;
nullSemantics._modified = ((nullSemantics._modified ? 1 : 0) | (!object.ReferenceEquals((object)n.Child0, (object)(n.Child0 = this.VisitNode(n.Child0))) || !object.ReferenceEquals((object)n.Child1, (object)(n.Child1 = this.VisitNode(n.Child1))) ? 1 : (!object.ReferenceEquals((object)n, (object)(n = this.ImplementEquality(n, negated))) ? 1 : 0))) != 0;
return(n);
}
public static bool Process(Command command)
{
NullSemantics nullSemantics = new NullSemantics(command);
command.Root = nullSemantics.VisitNode(command.Root);
return(nullSemantics._modified);
}
public static bool Process(Command command)
{
var processor = new NullSemantics(command);
command.Root = processor.VisitNode(command.Root);
return(processor._modified);
}
public static bool Process(Command command)
{
var processor = new NullSemantics(command);
command.Root = processor.VisitNode(command.Root);
return processor._modified;
}
// <summary>
// The real driver.
// </summary>
// <param name="providerCommands"> list of provider commands </param>
// <param name="resultColumnMap"> column map for the result </param>
// <param name="entitySets"> the entity sets exposed in this query </param>
private void Compile(
out List <ProviderCommandInfo> providerCommands, out ColumnMap resultColumnMap, out int columnCount,
out Set <md.EntitySet> entitySets)
{
Initialize(); // initialize the ITree
var beforePreProcessor = String.Empty;
var beforeAggregatePushdown = String.Empty;
var beforeNormalization = String.Empty;
var beforeNTE = String.Empty;
var beforeProjectionPruning1 = String.Empty;
var beforeNestPullup = String.Empty;
var beforeProjectionPruning2 = String.Empty;
var beforeTransformationRules1 = String.Empty;
var beforeProjectionPruning3 = String.Empty;
var beforeTransformationRules2 = String.Empty;
var beforeJoinElimination1 = String.Empty;
var beforeTransformationRules3 = String.Empty;
var beforeJoinElimination2 = String.Empty;
var beforeTransformationRules4 = String.Empty;
var beforeNullSemantics = String.Empty;
var beforeTransformationRules5 = String.Empty;
var beforeCodeGen = String.Empty;
//
// We always need the pre-processor and the codegen phases.
// It is generally a good thing to run through the transformation rules, and
// the projection pruning phases.
// The "optional" phases are AggregatePushdown, Normalization, NTE, NestPullup and JoinElimination
//
m_neededPhases = (1 << (int)PlanCompilerPhase.PreProcessor) |
// (1 << (int)PlanCompilerPhase.AggregatePushdown) |
// (1 << (int)PlanCompilerPhase.Normalization) |
// (1 << (int)PlanCompilerPhase.NTE) |
(1 << (int)PlanCompilerPhase.ProjectionPruning) |
// (1 << (int)PlanCompilerPhase.NestPullup) |
(1 << (int)PlanCompilerPhase.Transformations) |
// (1 << (int)PlanCompilerPhase.JoinElimination) |
// (1 << (int)PlanCompilerPhase.NullSemantics) |
(1 << (int)PlanCompilerPhase.CodeGen);
// Perform any necessary preprocessing
StructuredTypeInfo typeInfo;
Dictionary <md.EdmFunction, md.EdmProperty[]> tvfResultKeys;
beforePreProcessor = SwitchToPhase(PlanCompilerPhase.PreProcessor);
PreProcessor.Process(this, out typeInfo, out tvfResultKeys);
entitySets = typeInfo.GetEntitySets();
if (IsPhaseNeeded(PlanCompilerPhase.AggregatePushdown))
{
beforeAggregatePushdown = SwitchToPhase(PlanCompilerPhase.AggregatePushdown);
AggregatePushdown.Process(this);
}
if (IsPhaseNeeded(PlanCompilerPhase.Normalization))
{
beforeNormalization = SwitchToPhase(PlanCompilerPhase.Normalization);
Normalizer.Process(this);
}
// Eliminate "structured" types.
if (IsPhaseNeeded(PlanCompilerPhase.NTE))
{
beforeNTE = SwitchToPhase(PlanCompilerPhase.NTE);
NominalTypeEliminator.Process(this, typeInfo, tvfResultKeys);
}
// Projection pruning - eliminate unreferenced expressions
if (IsPhaseNeeded(PlanCompilerPhase.ProjectionPruning))
{
beforeProjectionPruning1 = SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
}
// Nest Pull-up on the ITree
if (IsPhaseNeeded(PlanCompilerPhase.NestPullup))
{
beforeNestPullup = SwitchToPhase(PlanCompilerPhase.NestPullup);
NestPullup.Process(this);
//If we do Nest Pull-up, we should again do projection pruning
beforeProjectionPruning2 = SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
}
// Run transformations on the tree
if (IsPhaseNeeded(PlanCompilerPhase.Transformations))
{
var projectionPrunningNeeded = ApplyTransformations(ref beforeTransformationRules1, TransformationRulesGroup.All);
if (projectionPrunningNeeded)
{
beforeProjectionPruning3 = SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
ApplyTransformations(ref beforeTransformationRules2, TransformationRulesGroup.Project);
}
}
// Join elimination
if (IsPhaseNeeded(PlanCompilerPhase.JoinElimination))
{
beforeJoinElimination1 = SwitchToPhase(PlanCompilerPhase.JoinElimination);
var modified = JoinElimination.Process(this);
if (modified)
{
ApplyTransformations(ref beforeTransformationRules3, TransformationRulesGroup.PostJoinElimination);
beforeJoinElimination2 = SwitchToPhase(PlanCompilerPhase.JoinElimination);
modified = JoinElimination.Process(this);
if (modified)
{
ApplyTransformations(ref beforeTransformationRules4, TransformationRulesGroup.PostJoinElimination);
}
}
}
if (IsPhaseNeeded(PlanCompilerPhase.NullSemantics) &&
!m_ctree.UseDatabaseNullSemantics)
{
beforeNullSemantics = SwitchToPhase(PlanCompilerPhase.NullSemantics);
if (NullSemantics.Process(Command))
{
ApplyTransformations(ref beforeTransformationRules5, TransformationRulesGroup.NullSemantics);
}
}
// Code generation
beforeCodeGen = SwitchToPhase(PlanCompilerPhase.CodeGen);
CodeGen.Process(this, out providerCommands, out resultColumnMap, out columnCount);
#if DEBUG
// GC.KeepAlive makes FxCop Grumpy.
var size = beforePreProcessor.Length;
size = beforeAggregatePushdown.Length;
size = beforeNormalization.Length;
size = beforeNTE.Length;
size = beforeProjectionPruning1.Length;
size = beforeNestPullup.Length;
size = beforeProjectionPruning2.Length;
size = beforeTransformationRules1.Length;
size = beforeProjectionPruning3.Length;
size = beforeTransformationRules2.Length;
size = beforeJoinElimination1.Length;
size = beforeTransformationRules3.Length;
size = beforeJoinElimination2.Length;
size = beforeTransformationRules4.Length;
size = beforeNullSemantics.Length;
size = beforeTransformationRules5.Length;
size = beforeCodeGen.Length;
#endif
}
private void Compile(
out List <ProviderCommandInfo> providerCommands,
out ColumnMap resultColumnMap,
out int columnCount,
out Set <EntitySet> entitySets)
{
this.Initialize();
string empty1 = string.Empty;
string empty2 = string.Empty;
string empty3 = string.Empty;
string empty4 = string.Empty;
string empty5 = string.Empty;
string empty6 = string.Empty;
string empty7 = string.Empty;
string empty8 = string.Empty;
string empty9 = string.Empty;
string empty10 = string.Empty;
string empty11 = string.Empty;
string empty12 = string.Empty;
string empty13 = string.Empty;
string empty14 = string.Empty;
string empty15 = string.Empty;
this.m_neededPhases = 593;
this.SwitchToPhase(PlanCompilerPhase.PreProcessor);
StructuredTypeInfo typeInfo;
Dictionary <EdmFunction, EdmProperty[]> tvfResultKeys;
PreProcessor.Process(this, out typeInfo, out tvfResultKeys);
entitySets = typeInfo.GetEntitySets();
if (this.IsPhaseNeeded(PlanCompilerPhase.AggregatePushdown))
{
this.SwitchToPhase(PlanCompilerPhase.AggregatePushdown);
AggregatePushdown.Process(this);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.Normalization))
{
this.SwitchToPhase(PlanCompilerPhase.Normalization);
Normalizer.Process(this);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.NTE))
{
this.SwitchToPhase(PlanCompilerPhase.NTE);
NominalTypeEliminator.Process(this, typeInfo, tvfResultKeys);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.ProjectionPruning))
{
this.SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.NestPullup))
{
this.SwitchToPhase(PlanCompilerPhase.NestPullup);
NestPullup.Process(this);
this.SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.Transformations) && this.ApplyTransformations(ref empty8, TransformationRulesGroup.All))
{
this.SwitchToPhase(PlanCompilerPhase.ProjectionPruning);
ProjectionPruner.Process(this);
this.ApplyTransformations(ref empty10, TransformationRulesGroup.Project);
}
if (this.IsPhaseNeeded(PlanCompilerPhase.NullSemantics))
{
this.SwitchToPhase(PlanCompilerPhase.NullSemantics);
if (!this.m_ctree.UseDatabaseNullSemantics && NullSemantics.Process(this.Command))
{
this.ApplyTransformations(ref empty12, TransformationRulesGroup.NullSemantics);
}
}
if (this.IsPhaseNeeded(PlanCompilerPhase.JoinElimination))
{
for (int index = 0; index < 10; ++index)
{
this.SwitchToPhase(PlanCompilerPhase.JoinElimination);
if (JoinElimination.Process(this) || this.TransformationsDeferred)
{
this.TransformationsDeferred = false;
this.ApplyTransformations(ref empty14, TransformationRulesGroup.PostJoinElimination);
}
else
{
break;
}
}
}
this.SwitchToPhase(PlanCompilerPhase.CodeGen);
CodeGen.Process(this, out providerCommands, out resultColumnMap, out columnCount);
}