DryadLinqQueryable.AssumeOrderBy(TSource, TKey) Method (IQueryable(TSource), Expression(Func(TSource, TKey)), Boolean)

DryadLinqQueryableAssumeOrderByTSource, TKey Method (IQueryableTSource, ExpressionFuncTSource, TKey, Boolean)

DryadLINQ documentation

Instructs DryadLINQ to assume that each partition of the dataset is ordered. A dataset is ordered if it is range partitioned and each partition of it is ordered on the same key.

Namespace: Microsoft.Research.DryadLinq
Assembly: Microsoft.Research.DryadLinq (in Microsoft.Research.DryadLinq.dll) Version: 0.2.1.0 (0.2.1.0)

Syntax

C++

Copy

public static IQueryable<TSource> AssumeOrderBy<TSource, TKey>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	bool isDescending
)

<ExtensionAttribute> 
Public Shared Function AssumeOrderBy(Of TSource, TKey) ( 
	source As IQueryable(Of TSource),
	keySelector As Expression(Of Func(Of TSource, TKey)),
	isDescending As Boolean
) As IQueryable(Of TSource)

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IQueryable<TSource>^ AssumeOrderBy(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, TKey>^>^ keySelector, 
	bool isDescending
)

Parameters

source: Type: System.LinqIQueryableTSource
The dataset
keySelector: Type: System.Linq.ExpressionsExpressionFuncTSource, TKey
The function to extract the key from a record
isDescending: Type: SystemBoolean
true to assume the order is descending

Type Parameters

TSource: The type of the recrods of the dataset
TKey: The type of the key on which partition is based

Return Value

Type: IQueryableTSource
The same dataset as input

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

DryadLinqQueryable Class

AssumeOrderBy Overload

Microsoft.Research.DryadLinq Namespace