public override DbExpression Visit(DbRefExpression expression)
{
Check.NotNull(expression, "expression");
DbExpression result = expression;
var targetType = (EntityType)TypeHelpers.GetEdmType <RefType>(expression.ResultType).ElementType;
var newArgument = VisitExpression(expression.Argument);
var newType = (EntityType)VisitType(targetType);
var newSet = (EntitySet)VisitEntitySet(expression.EntitySet);
if (!ReferenceEquals(expression.Argument, newArgument)
||
!ReferenceEquals(targetType, newType)
||
!ReferenceEquals(expression.EntitySet, newSet))
{
result = CqtBuilder.RefFromKey(newSet, newArgument, newType);
}
NotifyIfChanged(expression, result);
return(result);
}