Schema Class

Holds information about persistently stored types. Used internally by VelocityDb.

Inheritance Hierarchy

Namespace: VelocityDb.TypeInfo
Assembly: VelocityDb (in VelocityDb.dll) Version: 11.1.0.0 (11.1)

Syntax

[SerializableAttribute]
public class Schema : OptimizedPersistable

<SerializableAttribute>
Public Class Schema
	Inherits OptimizedPersistable

[SerializableAttribute]
public ref class Schema : public OptimizedPersistable

[<SerializableAttribute>]
type Schema =  
    class
        inherit OptimizedPersistable
    end

The Schema type exposes the following members.

Properties

	Name	Description
	AllowOtherTypesOnSamePage	Objects can be stored more efficiently if all object types on the page share the same type. By default mixed types are allowed. Override this to return false for types that should not share pages with other types. (Overrides OptimizedPersistableAllowOtherTypesOnSamePage.)
	Cache	Do cache CacheEnum.Yes (Overrides OptimizedPersistableCache.)
	LookupByType	For use in VelocityDBExtension DLL
	TypesByName	All persisted types ordered by Type name
	WeakReferencedTypes	Info about what Types another Type is referencing indirectly via object Id reference or other non explicit/weak reference. If your class persists objects with implicit/weak references to other persisted objects then register this facr by adding to this DictionaryTKey, TValue. Information provided by this DictionaryTKey, TValue is primarily used by Database Manager Schema Connectivity Window.

Methods

	Name	Description
	GetTypeVersion	Opens a TypeVersion object
	InitializeAfterRecreate	This function is called when an object has been read from disk before all data members (fields) have been fully loaded. Override this to provide your own initializations of transient data. (Overrides OptimizedPersistableInitializeAfterRecreate(SessionBase).)
	IsExpandedInternalType	Includes additional build in types
	IsInternalType(UInt16)	Determine if a given slot is within the range of slots containing the build in/pre registered types
	IsInternalType(VelocityDbType)	Determine if a given VelocityDbType is a build in/pre registered type
	ReadMe	(Overrides OptimizedPersistableReadMe(TypeVersion, Byte, Int32, SessionBase, Page, Boolean, Schema, Boolean, ListIOptimizedPersistable, Int32, Int32, Boolean).)
	RegisterClass	Register a type in the persistent schema

Fields

	Name	Description
	s_bootupTypeCount	VelocityDB internal schema requires this many slots on schema page
	s_bootupTypeCountExpanded	Additional internal schema added Setember 9, 2017
	SchemaDB

Extension Methods

	Name	Description
	ToStringDetails(SessionBase, Boolean)	Overloaded. Object details as a string (Defined by Utilities.)
	ToStringDetails(Schema, TypeVersion, Boolean)	Overloaded. Currently only used by Database Manager (Defined by Utilities.)