private static PropertyRefList GetIdentityProperties(EntityType type)
{
PropertyRefList keyProperties = PropertyPushdownHelper.GetKeyProperties(type);
keyProperties.Add((PropertyRef)EntitySetIdPropertyRef.Instance);
return(keyProperties);
}
/// <summary>
/// The driver.
/// Walks the tree, and "pushes" down information about required properties
/// to every node and Var in the tree.
/// </summary>
/// <param name="itree"> The query tree </param>
/// <param name="varPropertyRefs"> List of desired properties from each Var </param>
/// <param name="nodePropertyRefs"> List of desired properties from each node </param>
internal static void Process(
Command itree, out Dictionary<Var, PropertyRefList> varPropertyRefs, out Dictionary<Node, PropertyRefList> nodePropertyRefs)
{
var pph = new PropertyPushdownHelper();
pph.Process(itree.Root);
varPropertyRefs = pph.m_varPropertyRefMap;
nodePropertyRefs = pph.m_nodePropertyRefMap;
}
/// <summary>
/// The driver.
/// Walks the tree, and "pushes" down information about required properties
/// to every node and Var in the tree.
/// </summary>
/// <param name="itree"> The query tree </param>
/// <param name="varPropertyRefs"> List of desired properties from each Var </param>
/// <param name="nodePropertyRefs"> List of desired properties from each node </param>
internal static void Process(
Command itree, out Dictionary <Var, PropertyRefList> varPropertyRefs, out Dictionary <Node, PropertyRefList> nodePropertyRefs)
{
var pph = new PropertyPushdownHelper();
pph.Process(itree.Root);
varPropertyRefs = pph.m_varPropertyRefMap;
nodePropertyRefs = pph.m_nodePropertyRefMap;
}
public override void Visit(GetEntityRefOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
ScalarOp op1 = n.Child0.Op as ScalarOp;
System.Data.Entity.Core.Query.PlanCompiler.PlanCompiler.Assert(op1 != null, "input to GetEntityRefOp is not a ScalarOp?");
PropertyRefList identityProperties = PropertyPushdownHelper.GetIdentityProperties(TypeHelpers.GetEdmType <EntityType>(op1.Type));
this.AddPropertyRefs(n.Child0, identityProperties);
this.VisitNode(n.Child0);
}
internal static void Process(
Command itree,
out Dictionary <Var, PropertyRefList> varPropertyRefs,
out Dictionary <System.Data.Entity.Core.Query.InternalTrees.Node, PropertyRefList> nodePropertyRefs)
{
PropertyPushdownHelper propertyPushdownHelper = new PropertyPushdownHelper();
propertyPushdownHelper.Process(itree.Root);
varPropertyRefs = propertyPushdownHelper.m_varPropertyRefMap;
nodePropertyRefs = propertyPushdownHelper.m_nodePropertyRefMap;
}
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);
}
}
