DryadLinqQueryable.RangePartition(TSource, TKey) Method (IQueryable(TSource), Expression(Func(TSource, TKey)), Int32)

DryadLinqQueryable.RangePartition<TSource, TKey> Method (IQueryable<TSource>, Expression<Func<TSource, TKey>>, Int32)

DryadLINQ documentation

Range partition a dataset. The list of range keys are determined dynamically at runtime.

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> RangePartition<TSource, TKey>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	int partitionCount
)

<ExtensionAttribute> 
Public Shared Function RangePartition(Of TSource, TKey) ( 
	source As IQueryable(Of TSource),
	keySelector As Expression(Of Func(Of TSource, TKey)),
	partitionCount As Integer
) As IQueryable(Of TSource)

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IQueryable<TSource>^ RangePartition(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, TKey>^>^ keySelector, 
	int partitionCount
)

Parameters

source: Type: System.Linq.IQueryable<TSource>
The dataset to be partitioned
keySelector: Type: System.Linq.Expressions.Expression<Func<TSource, TKey>>
The function to extract the key from a record
partitionCount: Type: System.Int32
The number of partitions in the output dataset

Type Parameters

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

Return Value

Type: IQueryable<TSource>
An IQueryable partitioned according to a list of range keys determined at runtime

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable<TSource>. 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

RangePartition Overload

Microsoft.Research.DryadLinq Namespace