SqlHierarchyId 구조

The SqlHierarchyId type represents a position in a hierarchical structure, specifying depth and breadth.

네임스페이스:  Microsoft.SqlServer.Types
어셈블리:  Microsoft.SqlServer.Types(Microsoft.SqlServer.Types.dll)

구문

‘선언
<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered := True,  _
    MaxByteSize := , Name := "SqlHierarchyId")> _
<CLSCompliantAttribute(True)> _
Public Structure SqlHierarchyId _
    Implements IBinarySerialize, INullable, IComparable
‘사용 방법
Dim instance As SqlHierarchyId

[SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = true, 
    MaxByteSize = , Name = "SqlHierarchyId")]
[CLSCompliantAttribute(true)]
public struct SqlHierarchyId : IBinarySerialize, 
    INullable, IComparable

[SqlUserDefinedTypeAttribute(Format::UserDefined, IsByteOrdered = true, 
    MaxByteSize = , Name = L"SqlHierarchyId")]
[CLSCompliantAttribute(true)]
public value class SqlHierarchyId : IBinarySerialize, 
    INullable, IComparable

[<SealedAttribute>]
[<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = true, 
    MaxByteSize = , Name = "SqlHierarchyId")>]
[<CLSCompliantAttribute(true)>]
type SqlHierarchyId =  
    struct
        interface IBinarySerialize
        interface INullable
        interface IComparable
    end

Jscript는 구조체의 사용을 지원하지만 새로운 구조체 선언은 지원하지 않습니다.

SqlHierarchyId 유형에서 다음 멤버를 표시합니다.

속성

	이름	설명
	IsNull	Gets a value indicating whether the SqlHierarchyId is nullNothingnullptrunitnull 참조(Visual Basic에서는 Nothing).
	Null	Gets a SqlHierarchyId with a hierarchy identification of nullNothingnullptrunitnull 참조(Visual Basic에서는 Nothing).

맨 위로 이동

메서드

	이름	설명
	CompareTo(Object)	Returns a value indicating the results of a comparison between a SqlHierarchyId and an object.
	CompareTo(SqlHierarchyId)	Returns a value indicating the results of a comparison between two SqlHierarchyId nodes.
	Equals	Evaluates whether SqlHierarchyId and obj are equal. (ValueType. . :: . .Equals(Object)을(를) 재정의함)
	Finalize	(Object에서 상속됨)
	GetAncestor	Retrieves the SqlHierarchyId node n levels up the hierarchical tree.
	GetDescendant	Gets the value of a descendant SqlHierarchyId node that is greater than child1 and less than child2.
	GetHashCode	Gets a hash of the path from the root node of the hierarchy tree to the SqlHierarchyId node. (ValueType. . :: . .GetHashCode() () () ()을(를) 재정의함)
	GetLevel	Gets a value indicating the level of the SqlHierarchyId node in the hierarchical tree.
	GetReparentedValue	Gets a value representing the location of a new SqlHierarchyId node that has a path from newRoot equal to the path from oldRoot to this, effectively moving this to the new location.
	GetRoot	Gets a value representing the root SqlHierarchyId node of the hierarchy.
	GetType	(Object에서 상속됨)
	IsDescendantOf	Gets a value indicating whether the SqlHierarchyId node is the descendant of the parent.
	MemberwiseClone	(Object에서 상속됨)
	Parse	Converts the canonical string representation of a SqlHierarchyId node to a SqlHierarchyId value.
	Read	Reads from a specified binary reader into a SqlHierarchyId.
	ToString	Returns the canonical string representation of a SqlHierarchyId node from a SqlHierarchyId value. (ValueType. . :: . .ToString() () () ()을(를) 재정의함)
	Write	Writes a SqlHierarchyId to a specified binary writer.

맨 위로 이동

연산자

	이름	설명
	Equality	Evaluates whether two SqlHierarchyId nodes are equal.
	GreaterThan	Evaluates whether one specified SqlHierarchyId node is greater than another.
	GreaterThanOrEqual	Evaluates whether one specified SqlHierarchyId node is greater than or equal to another.
	Inequality	Evaluates whether two SqlHierarchyId nodes are unequal.
	LessThan	Evaluates whether one specified SqlHierarchyId node is less than another.
	LessThanOrEqual	Evaluates whether one specified SqlHierarchyId node is less than or equal to another.

맨 위로 이동

주의

This type provides the following benefits for storing hierarchical information:

• Very compact data storage.

• Depth-first comparison. Indexes on this type are in depth-first order, and nodes close to each other in a depth-first traversal are stored near each other.

• Support for arbitrary insertions and deletions.

• A limitation of this type is that a single instance of the hierarchy data type can be no larger than 892 bytes. Hierarchies that possess too many levels to fit within this limitation must use a different data type.

The HierarchyId type is available to CLR clients as the SqlHierarchyId data type.

예

DECLARE @employee hierarchyid
SELECT @employee = OrgNode FROM HumanResources.EmployeeDemo
  WHERE LoginID = 'adventure-works\dylan0'

SELECT * FROM HumanResources.EmployeeDemo
WHERE @employee.IsDescendantOf(OrgNode) = 1

스레드 보안

이 유형의 모든 공용 static(Visual Basic에서는 Shared) 멤버는 스레드로부터 안전합니다. 인스턴스 멤버는 스레드로부터의 안전성이 보장되지 않습니다.

참고 항목

참조

Microsoft.SqlServer.Types 네임스페이스