public override void Visit(RelPropertyOp op, Node n)
{
VisitScalarOpDefault(op, n);
Assert(m_command.IsRelPropertyReferenced(op.PropertyInfo), "no such rel property:", op.PropertyInfo);
Assert(
TypeSemantics.IsEntityType(n.Child0.Op.Type), "argument to RelPropertyOp must be an entity type. Found: ", n.Child0.Op.Type);
}
// <summary>
// Returns true if typeUsage type is valid for IS [NOT] NULL (expr) operator
// </summary>
internal static bool IsValidIsNullOpType(TypeUsage typeUsage)
{
return(TypeSemantics.IsReferenceType(typeUsage) ||
TypeSemantics.IsEntityType(typeUsage) ||
TypeSemantics.IsScalarType(typeUsage) ||
TypeSemantics.IsRowType(typeUsage));
}
private ColumnMap CreateStructuralColumnMap(TypeUsage type, string name)
{
TypeInfo typeInfo = this.m_typeInfo.GetTypeInfo(type);
if (TypeSemantics.IsRowType(type))
{
return((ColumnMap)this.CreateRecordColumnMap(typeInfo, name));
}
if (TypeSemantics.IsReferenceType(type))
{
return((ColumnMap)this.CreateRefColumnMap(typeInfo, name));
}
if (typeInfo.HasTypeIdProperty)
{
return((ColumnMap)this.CreatePolymorphicColumnMap(typeInfo, name));
}
if (TypeSemantics.IsComplexType(type))
{
return((ColumnMap)this.CreateComplexTypeColumnMap(typeInfo, name, (ComplexTypeColumnMap)null, (Dictionary <object, TypedColumnMap>)null, (List <TypedColumnMap>)null));
}
if (TypeSemantics.IsEntityType(type))
{
return((ColumnMap)this.CreateEntityColumnMap(typeInfo, name, (EntityColumnMap)null, (Dictionary <object, TypedColumnMap>)null, (List <TypedColumnMap>)null, true));
}
throw new NotSupportedException(type.Identity);
}
private void ExplodeRootStructuredType(RootTypeInfo rootType)
{
if (rootType.FlattenedType != null)
{
return;
}
if (StructuredTypeInfo.NeedsTypeIdProperty((TypeInfo)rootType))
{
rootType.AddPropertyRef((PropertyRef)TypeIdPropertyRef.Instance);
if (rootType.DiscriminatorMap != null)
{
rootType.TypeIdKind = TypeIdKind.UserSpecified;
rootType.TypeIdType = Helper.GetModelTypeUsage(rootType.DiscriminatorMap.DiscriminatorProperty);
}
else
{
rootType.TypeIdKind = TypeIdKind.Generated;
rootType.TypeIdType = this.m_stringType;
}
}
if (this.NeedsEntitySetIdProperty((TypeInfo)rootType))
{
rootType.AddPropertyRef((PropertyRef)EntitySetIdPropertyRef.Instance);
}
if (this.NeedsNullSentinelProperty((TypeInfo)rootType))
{
rootType.AddPropertyRef((PropertyRef)NullSentinelPropertyRef.Instance);
}
this.ExplodeRootStructuredTypeHelper((TypeInfo)rootType);
if (TypeSemantics.IsEntityType(rootType.Type))
{
this.AddRelProperties((TypeInfo)rootType);
}
this.CreateFlattenedRecordType(rootType);
}
internal static DbExpression FindNavigationExpression(DbExpression expression, AliasGenerator aliasGenerator, out NavigationInfo navInfo)
{
Debug.Assert(TypeSemantics.IsCollectionType(expression.ResultType), "Non-collection input to projection?");
navInfo = null;
TypeUsage elementType = ((CollectionType)expression.ResultType.EdmType).TypeUsage;
if (!TypeSemantics.IsEntityType(elementType) && !TypeSemantics.IsReferenceType(elementType))
{
return(expression);
}
RelationshipNavigationVisitor visitor = new RelationshipNavigationVisitor(aliasGenerator);
DbExpression rewrittenExpression = visitor.Find(expression);
if (!object.ReferenceEquals(expression, rewrittenExpression))
{
Debug.Assert(visitor._original != null && visitor._rewritten != null, "Expression was rewritten but no navigation was found?");
navInfo = new NavigationInfo(visitor._original, visitor._rewritten);
return(rewrittenExpression);
}
else
{
return(expression);
}
}
internal static bool IsValidInOpType(TypeUsage typeUsage)
{
if (!TypeSemantics.IsReferenceType(typeUsage) && !TypeSemantics.IsEntityType(typeUsage))
{
return(TypeSemantics.IsScalarType(typeUsage));
}
return(true);
}
internal DbNewInstanceExpression(TypeUsage resultType, DbExpressionList attributeValues, System.Collections.ObjectModel.ReadOnlyCollection <DbRelatedEntityRef> relationships)
: this(resultType, attributeValues)
{
Debug.Assert(TypeSemantics.IsEntityType(resultType), "An entity type is required to create a NewEntityWithRelationships expression");
Debug.Assert(relationships != null, "Related entity ref collection cannot be null");
this._relatedEntityRefs = (relationships.Count > 0 ? relationships : null);
}
public override void Visit(DerefOp op, Node n)
{
VisitScalarOpDefault(op, n);
Assert(TypeSemantics.IsEntityType(op.Type), "Expected an entity type. Found " + op.Type);
Assert(TypeSemantics.IsReferenceType(n.Child0.Op.Type), "Expected a ref type. Found " + n.Child0.Op.Type);
RefType r = n.Child0.Op.Type.EdmType as RefType;
Assert(r.ElementType.EdmEquals(op.Type.EdmType), "Inconsistent types");
}
internal DbNewInstanceExpression(
TypeUsage resultType, DbExpressionList attributeValues, ReadOnlyCollection <DbRelatedEntityRef> relationships)
: this(resultType, attributeValues)
{
Debug.Assert(
TypeSemantics.IsEntityType(resultType), "An entity type is required to create a NewEntityWithRelationships expression");
DebugCheck.NotNull(relationships);
_relatedEntityRefs = (relationships.Count > 0 ? relationships : null);
}
private void AssignTypeIds()
{
int num = 0;
foreach (KeyValuePair <TypeUsage, TypeInfo> typeInfo in this.m_typeInfoMap)
{
if (typeInfo.Value.RootType.DiscriminatorMap != null)
{
EntityType edmType = (EntityType)typeInfo.Key.EdmType;
typeInfo.Value.TypeId = typeInfo.Value.RootType.DiscriminatorMap.GetTypeId(edmType);
}
else if (typeInfo.Value.IsRootType && (TypeSemantics.IsEntityType(typeInfo.Key) || TypeSemantics.IsComplexType(typeInfo.Key)))
{
this.AssignRootTypeId(typeInfo.Value, string.Format((IFormatProvider)CultureInfo.InvariantCulture, "{0}X", (object)num));
++num;
}
}
}
private void CreateFlattenedRecordType(RootTypeInfo type)
{
bool flag = TypeSemantics.IsEntityType(type.Type) && type.ImmediateSubTypes.Count == 0;
List <KeyValuePair <string, TypeUsage> > keyValuePairList = new List <KeyValuePair <string, TypeUsage> >();
HashSet <string> stringSet = new HashSet <string>();
int num = 0;
foreach (PropertyRef propertyRef in type.PropertyRefList)
{
string key = (string)null;
if (flag)
{
SimplePropertyRef simplePropertyRef = propertyRef as SimplePropertyRef;
if (simplePropertyRef != null)
{
key = simplePropertyRef.Property.Name;
}
}
if (key == null)
{
key = "F" + num.ToString((IFormatProvider)CultureInfo.InvariantCulture);
++num;
}
while (stringSet.Contains(key))
{
key = "F" + num.ToString((IFormatProvider)CultureInfo.InvariantCulture);
++num;
}
TypeUsage propertyType = this.GetPropertyType(type, propertyRef);
keyValuePairList.Add(new KeyValuePair <string, TypeUsage>(key, propertyType));
stringSet.Add(key);
}
type.FlattenedType = TypeHelpers.CreateRowType((IEnumerable <KeyValuePair <string, TypeUsage> >)keyValuePairList);
IEnumerator <PropertyRef> enumerator = type.PropertyRefList.GetEnumerator();
foreach (EdmProperty property in type.FlattenedType.Properties)
{
if (!enumerator.MoveNext())
{
System.Data.Entity.Core.Query.PlanCompiler.PlanCompiler.Assert(false, "property refs count and flattened type member count mismatch?");
}
type.AddPropertyMapping(enumerator.Current, property);
}
}
internal static DbExpression FindNavigationExpression(
DbExpression expression,
AliasGenerator aliasGenerator,
out ObjectSpanRewriter.NavigationInfo navInfo)
{
navInfo = (ObjectSpanRewriter.NavigationInfo)null;
TypeUsage typeUsage = ((CollectionType)expression.ResultType.EdmType).TypeUsage;
if (!TypeSemantics.IsEntityType(typeUsage) && !TypeSemantics.IsReferenceType(typeUsage))
{
return(expression);
}
ObjectSpanRewriter.RelationshipNavigationVisitor navigationVisitor = new ObjectSpanRewriter.RelationshipNavigationVisitor(aliasGenerator);
DbExpression dbExpression = navigationVisitor.Find(expression);
if (object.ReferenceEquals((object)expression, (object)dbExpression))
{
return(expression);
}
navInfo = new ObjectSpanRewriter.NavigationInfo(navigationVisitor._original, navigationVisitor._rewritten);
return(dbExpression);
}
public override void Visit(ComparisonOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
TypeUsage type = (n.Child0.Op as ScalarOp).Type;
if (!TypeUtils.IsStructuredType(type))
{
this.VisitChildren(n);
}
else if (TypeSemantics.IsRowType(type) || TypeSemantics.IsReferenceType(type))
{
this.VisitDefault(n);
}
else
{
System.Data.Entity.Core.Query.PlanCompiler.PlanCompiler.Assert(TypeSemantics.IsEntityType(type), "unexpected childOpType?");
PropertyRefList identityProperties = PropertyPushdownHelper.GetIdentityProperties(TypeHelpers.GetEdmType <EntityType>(type));
foreach (System.Data.Entity.Core.Query.InternalTrees.Node child in n.Children)
{
this.AddPropertyRefs(child, identityProperties);
}
this.VisitChildren(n);
}
}
/// <summary>
/// Adds the flattened properties on the input to the flattenedProperties list.
/// </summary>
/// <param name="input"></param>
/// <param name="flattenedProperties"></param>
private void FlattenProperties(DbExpression input, IList <DbPropertyExpression> flattenedProperties)
{
IList <EdmProperty> properties = TypeHelpers.GetProperties(input.ResultType);
Debug.Assert(properties.Count != 0, "No nested properties when FlattenProperties called?");
for (int i = 0; i < properties.Count; i++)
{
DbExpression propertyInput = input;
DbPropertyExpression propertyExpression = propertyInput.Property(properties[i]);
if (TypeSemantics.IsPrimitiveType(properties[i].TypeUsage))
{
flattenedProperties.Add(propertyExpression);
}
else
{
Debug.Assert(TypeSemantics.IsEntityType(properties[i].TypeUsage) || TypeSemantics.IsRowType(properties[i].TypeUsage),
"The input to FlattenProperties is not of EntityType or RowType?");
FlattenProperties(propertyExpression, flattenedProperties);
}
}
}
private static DbExpression SimplifyNestedTphDiscriminator(DbExpression expression)
{
DbProjectExpression projectExpression = (DbProjectExpression)expression;
DbFilterExpression booleanColumnFilter = (DbFilterExpression)projectExpression.Input.Expression;
DbProjectExpression expression1 = (DbProjectExpression)booleanColumnFilter.Input.Expression;
DbFilterExpression expression2 = (DbFilterExpression)expression1.Input.Expression;
List <DbExpression> list1 = ViewSimplifier.FlattenOr(booleanColumnFilter.Predicate).ToList <DbExpression>();
List <DbPropertyExpression> list2 = list1.OfType <DbPropertyExpression>().Where <DbPropertyExpression>((Func <DbPropertyExpression, bool>)(px =>
{
if (px.Instance.ExpressionKind == DbExpressionKind.VariableReference)
{
return(((DbVariableReferenceExpression)px.Instance).VariableName == booleanColumnFilter.Input.VariableName);
}
return(false);
})).ToList <DbPropertyExpression>();
if (list1.Count != list2.Count)
{
return((DbExpression)null);
}
List <string> list3 = list2.Select <DbPropertyExpression, string>((Func <DbPropertyExpression, string>)(px => px.Property.Name)).ToList <string>();
Dictionary <object, DbComparisonExpression> discriminatorPredicates = new Dictionary <object, DbComparisonExpression>();
if (!TypeSemantics.IsEntityType(expression2.Input.VariableType) || !ViewSimplifier.TryMatchDiscriminatorPredicate(expression2, (Action <DbComparisonExpression, object>)((compEx, discValue) => discriminatorPredicates.Add(discValue, compEx))))
{
return((DbExpression)null);
}
EdmProperty property1 = (EdmProperty)((DbPropertyExpression)discriminatorPredicates.First <KeyValuePair <object, DbComparisonExpression> >().Value.Left).Property;
DbNewInstanceExpression projection1 = (DbNewInstanceExpression)expression1.Projection;
RowType edmType = TypeHelpers.GetEdmType <RowType>(projection1.ResultType);
Dictionary <string, DbComparisonExpression> dictionary1 = new Dictionary <string, DbComparisonExpression>();
Dictionary <string, DbComparisonExpression> dictionary2 = new Dictionary <string, DbComparisonExpression>();
Dictionary <string, DbExpression> propertyValues = new Dictionary <string, DbExpression>(projection1.Arguments.Count);
for (int index = 0; index < projection1.Arguments.Count; ++index)
{
string name = edmType.Properties[index].Name;
DbExpression dbExpression = projection1.Arguments[index];
if (list3.Contains(name))
{
if (dbExpression.ExpressionKind != DbExpressionKind.Case)
{
return((DbExpression)null);
}
DbCaseExpression dbCaseExpression = (DbCaseExpression)dbExpression;
if (dbCaseExpression.When.Count != 1 || !TypeSemantics.IsBooleanType(dbCaseExpression.Then[0].ResultType) || (!TypeSemantics.IsBooleanType(dbCaseExpression.Else.ResultType) || dbCaseExpression.Then[0].ExpressionKind != DbExpressionKind.Constant) || (dbCaseExpression.Else.ExpressionKind != DbExpressionKind.Constant || !(bool)((DbConstantExpression)dbCaseExpression.Then[0]).Value || (bool)((DbConstantExpression)dbCaseExpression.Else).Value))
{
return((DbExpression)null);
}
DbPropertyExpression property2;
object key;
if (!ViewSimplifier.TryMatchPropertyEqualsValue(dbCaseExpression.When[0], expression1.Input.VariableName, out property2, out key) || property2.Property != property1 || !discriminatorPredicates.ContainsKey(key))
{
return((DbExpression)null);
}
dictionary1.Add(name, discriminatorPredicates[key]);
dictionary2.Add(name, (DbComparisonExpression)dbCaseExpression.When[0]);
}
else
{
propertyValues.Add(name, dbExpression);
}
}
DbExpression predicate = Helpers.BuildBalancedTreeInPlace <DbExpression>((IList <DbExpression>) new List <DbExpression>((IEnumerable <DbExpression>)dictionary1.Values), (Func <DbExpression, DbExpression, DbExpression>)((left, right) => (DbExpression)left.Or(right)));
DbFilterExpression input = expression2.Input.Filter(predicate);
DbCaseExpression projection2 = (DbCaseExpression)projectExpression.Projection;
List <DbExpression> dbExpressionList1 = new List <DbExpression>(projection2.When.Count);
List <DbExpression> dbExpressionList2 = new List <DbExpression>(projection2.Then.Count);
for (int index = 0; index < projection2.When.Count; ++index)
{
DbPropertyExpression propertyExpression = (DbPropertyExpression)projection2.When[index];
DbNewInstanceExpression instanceExpression = (DbNewInstanceExpression)projection2.Then[index];
DbComparisonExpression comparisonExpression;
if (!dictionary2.TryGetValue(propertyExpression.Property.Name, out comparisonExpression))
{
return((DbExpression)null);
}
dbExpressionList1.Add((DbExpression)comparisonExpression);
DbExpression dbExpression = ViewSimplifier.ValueSubstituter.Substitute((DbExpression)instanceExpression, projectExpression.Input.VariableName, propertyValues);
dbExpressionList2.Add(dbExpression);
}
DbExpression elseExpression = ViewSimplifier.ValueSubstituter.Substitute(projection2.Else, projectExpression.Input.VariableName, propertyValues);
DbCaseExpression dbCaseExpression1 = DbExpressionBuilder.Case((IEnumerable <DbExpression>)dbExpressionList1, (IEnumerable <DbExpression>)dbExpressionList2, elseExpression);
return((DbExpression)input.BindAs(expression1.Input.VariableName).Project((DbExpression)dbCaseExpression1));
}
internal DbDerefExpression(TypeUsage entityResultType, DbExpression refExpr)
: base(DbExpressionKind.Deref, entityResultType, refExpr)
{
Debug.Assert(TypeSemantics.IsEntityType(entityResultType), "DbDerefExpression requires an entity result type");
}
internal static bool IsStructuredType(TypeUsage type)
{
if (!TypeSemantics.IsReferenceType(type) && !TypeSemantics.IsRowType(type) && (!TypeSemantics.IsEntityType(type) && !TypeSemantics.IsRelationshipType(type)))
{
return(TypeSemantics.IsComplexType(type));
}
return(true);
}
internal NewInstanceOp(TypeUsage type)
: base(OpType.NewInstance, type)
{
Debug.Assert(!type.EdmType.Abstract, "cannot create new instance of abstract type");
Debug.Assert(!TypeSemantics.IsEntityType(type), "cannot use this Op for entity construction");
}
private static DbExpression SimplifyNestedTphDiscriminator(DbExpression expression)
{
var entityProjection = (DbProjectExpression)expression;
var booleanColumnFilter = (DbFilterExpression)entityProjection.Input.Expression;
var rowProjection = (DbProjectExpression)booleanColumnFilter.Input.Expression;
var discriminatorFilter = (DbFilterExpression)rowProjection.Input.Expression;
var predicates = FlattenOr(booleanColumnFilter.Predicate).ToList();
var propertyPredicates =
predicates.OfType <DbPropertyExpression>()
.Where(
px => px.Instance.ExpressionKind == DbExpressionKind.VariableReference &&
((DbVariableReferenceExpression)px.Instance).VariableName == booleanColumnFilter.Input.VariableName)
.ToList();
if (predicates.Count
!= propertyPredicates.Count)
{
return(null);
}
var predicateColumnNames = propertyPredicates.Select(px => px.Property.Name).ToList();
var discriminatorPredicates = new Dictionary <object, DbComparisonExpression>();
if (!TypeSemantics.IsEntityType(discriminatorFilter.Input.VariableType)
||
!TryMatchDiscriminatorPredicate(discriminatorFilter, (compEx, discValue) => discriminatorPredicates.Add(discValue, compEx)))
{
return(null);
}
var discriminatorProp = (EdmProperty)((DbPropertyExpression)(discriminatorPredicates.First().Value).Left).Property;
var rowConstructor = (DbNewInstanceExpression)rowProjection.Projection;
var resultRow = TypeHelpers.GetEdmType <RowType>(rowConstructor.ResultType);
var inputPredicateMap = new Dictionary <string, DbComparisonExpression>();
var selectorPredicateMap = new Dictionary <string, DbComparisonExpression>();
var columnValues = new Dictionary <string, DbExpression>(rowConstructor.Arguments.Count);
for (var idx = 0; idx < rowConstructor.Arguments.Count; idx++)
{
var propName = resultRow.Properties[idx].Name;
var columnVal = rowConstructor.Arguments[idx];
if (predicateColumnNames.Contains(propName))
{
if (columnVal.ExpressionKind
!= DbExpressionKind.Case)
{
return(null);
}
var casePredicate = (DbCaseExpression)columnVal;
if (casePredicate.When.Count != 1
||
!TypeSemantics.IsBooleanType(casePredicate.Then[0].ResultType) ||
!TypeSemantics.IsBooleanType(casePredicate.Else.ResultType)
||
casePredicate.Then[0].ExpressionKind != DbExpressionKind.Constant ||
casePredicate.Else.ExpressionKind != DbExpressionKind.Constant
||
(bool)((DbConstantExpression)casePredicate.Then[0]).Value != true ||
(bool)((DbConstantExpression)casePredicate.Else).Value)
{
return(null);
}
DbPropertyExpression comparedProp;
object constValue;
if (
!TryMatchPropertyEqualsValue(
casePredicate.When[0], rowProjection.Input.VariableName, out comparedProp, out constValue)
||
comparedProp.Property != discriminatorProp
||
!discriminatorPredicates.ContainsKey(constValue))
{
return(null);
}
inputPredicateMap.Add(propName, discriminatorPredicates[constValue]);
selectorPredicateMap.Add(propName, (DbComparisonExpression)casePredicate.When[0]);
}
else
{
columnValues.Add(propName, columnVal);
}
}
// Build a new discriminator-based filter that only includes the same rows allowed by the higher '_from0' column-based filter
var newDiscriminatorPredicate = Helpers.BuildBalancedTreeInPlace(
new List <DbExpression>(inputPredicateMap.Values), (left, right) => left.Or(right));
discriminatorFilter = discriminatorFilter.Input.Filter(newDiscriminatorPredicate);
var entitySelector = (DbCaseExpression)entityProjection.Projection;
var newWhens = new List <DbExpression>(entitySelector.When.Count);
var newThens = new List <DbExpression>(entitySelector.Then.Count);
for (var idx = 0; idx < entitySelector.When.Count; idx++)
{
var propWhen = (DbPropertyExpression)entitySelector.When[idx];
var entityThen = (DbNewInstanceExpression)entitySelector.Then[idx];
DbComparisonExpression discriminatorWhen;
if (!selectorPredicateMap.TryGetValue(propWhen.Property.Name, out discriminatorWhen))
{
return(null);
}
newWhens.Add(discriminatorWhen);
var inputBoundEntityConstructor = ValueSubstituter.Substitute(entityThen, entityProjection.Input.VariableName, columnValues);
newThens.Add(inputBoundEntityConstructor);
}
var newElse = ValueSubstituter.Substitute(entitySelector.Else, entityProjection.Input.VariableName, columnValues);
var newEntitySelector = DbExpressionBuilder.Case(newWhens, newThens, newElse);
DbExpression result = discriminatorFilter.BindAs(rowProjection.Input.VariableName).Project(newEntitySelector);
return(result);
}