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<html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><link rel="shortcut icon" href="../icons/favicon.ico" /><style type="text/css">.OH_CodeSnippetContainerTabLeftActive, .OH_CodeSnippetContainerTabLeft,.OH_CodeSnippetContainerTabLeftDisabled { }.OH_CodeSnippetContainerTabRightActive, .OH_CodeSnippetContainerTabRight,.OH_CodeSnippetContainerTabRightDisabled { }.OH_footer { }</style><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"> </script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>DryadLinqQueryable.RangePartition(TSource, TKey) Method (IQueryable(TSource), Expression(Func(TSource, TKey)), Boolean, Int32)</title><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Id" content="M:Microsoft.Research.DryadLinq.DryadLinqQueryable.RangePartition``2(System.Linq.IQueryable{``0},System.Linq.Expressions.Expression{System.Func{``0,``1}},System.Boolean,System.Int32)" /><meta name="Description" content="Range partition a dataset. The list of range keys are determined dynamically at runtime." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="Microsoft.Research.DryadLinq" /><meta name="file" content="3bc565ad-e271-6d9d-3049-d1dd5fb4867e" /><meta name="guid" content="3bc565ad-e271-6d9d-3049-d1dd5fb4867e" /></head><body onload="OnLoad('cs')"><input type="hidden" id="userDataCache" class="userDataStyle" /><div class="OH_outerDiv"><div class="OH_outerContent"><table class="TitleTable"><tr><td class="OH_tdTitleColumn">DryadLinqQueryable<span id="LSTDA85B5D5_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_0?cpp=::|nu=.");</script>RangePartition<span id="LSTDA85B5D5_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_1?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="typeparameter">TSource</span>, <span class="typeparameter">TKey</span><span id="LSTDA85B5D5_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_2?cs=>|vb=)|cpp=>|fs=>|nu=)");</script> Method (IQueryable<span id="LSTDA85B5D5_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_3?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="typeparameter">TSource</span><span id="LSTDA85B5D5_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_4?cs=>|vb=)|cpp=>|fs=>|nu=)");</script>, Expression<span id="LSTDA85B5D5_5"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_5?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script>Func<span id="LSTDA85B5D5_6"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_6?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="typeparameter">TSource</span>, <span class="typeparameter">TKey</span><span id="LSTDA85B5D5_7"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_7?cs=>|vb=)|cpp=>|fs=>|nu=)");</script><span id="LSTDA85B5D5_8"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_8?cs=>|vb=)|cpp=>|fs=>|nu=)");</script>, Boolean, Int32)</td><td class="OH_tdRunningTitleColumn">DryadLINQ documentation</td></tr></table><div id="mainSection"><div id="mainBody"><span class="introStyle"></span><div class="summary">
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Range partition a dataset. The list of range keys are determined dynamically at
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runtime.
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</div><p> </p><strong>Namespace:</strong> <a href="efe6507e-9fd8-bbd3-8227-fd6ba9e289c1.htm">Microsoft.Research.DryadLinq</a><br /><strong>Assembly:</strong> Microsoft.Research.DryadLinq (in Microsoft.Research.DryadLinq.dll) Version: 0.2.1.0 (0.2.1.0)<div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Syntax</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><div class="OH_CodeSnippetContainer"><div class="OH_CodeSnippetContainerTabs"><div class="OH_CodeSnippetContainerTabLeft" id="ID0ECCA_tabimgleft"> </div><div id="ID0ECCA_tab1" class="OH_CodeSnippetContainerTabFirst"><a href="#" onclick="javascript:ChangeTab('ID0ECCA','cs','1','3');return false;">C#</a></div><div id="ID0ECCA_tab2" class="OH_CodeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0ECCA','vb','2','3');return false;">VB</a></div><div id="ID0ECCA_tab3" class="OH_CodeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0ECCA','cpp','3','3');return false;">C++</a></div><div class="OH_CodeSnippetContainerTabRight" id="ID0ECCA_tabimgright"> </div></div><div class="OH_CodeSnippetContainerCodeCollection"><div class="OH_CodeSnippetToolBar"><div class="OH_CodeSnippetToolBarText"><a id="ID0ECCA_copyCode" href="#" onclick="javascript:CopyToClipboard('ID0ECCA');return false;" title="Copy">Copy</a></div></div><div id="ID0ECCA_code_Div1" class="OH_CodeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="identifier">IQueryable</span><TSource> <span class="identifier">RangePartition</span><TSource, TKey>(
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<span class="keyword">this</span> <span class="identifier">IQueryable</span><TSource> <span class="parameter">source</span>,
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<span class="identifier">Expression</span><<span class="identifier">Func</span><TSource, TKey>> <span class="parameter">keySelector</span>,
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<span class="identifier">bool</span> <span class="parameter">isDescending</span>,
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<span class="identifier">int</span> <span class="parameter">partitionCount</span>
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)
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</pre></div><div id="ID0ECCA_code_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><<span class="identifier">ExtensionAttribute</span>>
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<span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">Function</span> <span class="identifier">RangePartition</span>(<span class="keyword">Of</span> TSource, TKey) (
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<span class="parameter">source</span> <span class="keyword">As</span> <span class="identifier">IQueryable</span>(<span class="keyword">Of</span> TSource),
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<span class="parameter">keySelector</span> <span class="keyword">As</span> <span class="identifier">Expression</span>(<span class="keyword">Of</span> <span class="identifier">Func</span>(<span class="keyword">Of</span> TSource, TKey)),
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<span class="parameter">isDescending</span> <span class="keyword">As</span> <span class="identifier">Boolean</span>,
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<span class="parameter">partitionCount</span> <span class="keyword">As</span> <span class="identifier">Integer</span>
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) <span class="keyword">As</span> <span class="identifier">IQueryable</span>(<span class="keyword">Of</span> TSource)</pre></div><div id="ID0ECCA_code_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
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[<span class="identifier">ExtensionAttribute</span>]
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<span class="keyword">generic</span><<span class="keyword">typename</span> TSource, <span class="keyword">typename</span> TKey>
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<span class="keyword">static</span> <span class="identifier">IQueryable</span><TSource>^ <span class="identifier">RangePartition</span>(
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<span class="identifier">IQueryable</span><TSource>^ <span class="parameter">source</span>,
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<span class="identifier">Expression</span><<span class="identifier">Func</span><TSource, TKey>^>^ <span class="parameter">keySelector</span>,
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<span class="identifier">bool</span> <span class="parameter">isDescending</span>,
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<span class="identifier">int</span> <span class="parameter">partitionCount</span>
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)</pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0ECCA");</script><h4 class="subHeading">Parameters</h4><dl><dt><span class="parameter">source</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/bb351562" target="_blank">System.Linq<span id="LSTDA85B5D5_9"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_9?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>IQueryable</a><span id="LSTDA85B5D5_10"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_10?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="selflink"><span class="typeparameter">TSource</span></span><span id="LSTDA85B5D5_11"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_11?cs=>|vb=)|cpp=>|fs=>|nu=)");</script><br />The dataset to be partitioned</dd><dt><span class="parameter">keySelector</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/bb335710" target="_blank">System.Linq.Expressions<span id="LSTDA85B5D5_12"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_12?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Expression</a><span id="LSTDA85B5D5_13"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_13?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><a href="http://msdn2.microsoft.com/en-us/library/bb549151" target="_blank">Func</a><span id="LSTDA85B5D5_14"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_14?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="selflink"><span class="typeparameter">TSource</span></span>, <span class="selflink"><span class="typeparameter">TKey</span></span><span id="LSTDA85B5D5_15"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_15?cs=>|vb=)|cpp=>|fs=>|nu=)");</script><span id="LSTDA85B5D5_16"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_16?cs=>|vb=)|cpp=>|fs=>|nu=)");</script><br />The funtion to extract the key from a record</dd><dt><span class="parameter">isDescending</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/a28wyd50" target="_blank">System<span id="LSTDA85B5D5_17"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_17?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Boolean</a><br />true if the partition keys are descending</dd><dt><span class="parameter">partitionCount</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/td2s409d" target="_blank">System<span id="LSTDA85B5D5_18"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_18?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>Int32</a><br />Number of partitions in the output dataset</dd></dl><h4 class="subHeading">Type Parameters</h4><dl><dt><span class="parameter">TSource</span></dt><dd>The type of the records in the dataset</dd><dt><span class="parameter">TKey</span></dt><dd>The type of the key on which the partition is based</dd></dl><h4 class="subHeading">Return Value</h4>Type: <a href="http://msdn2.microsoft.com/en-us/library/bb351562" target="_blank">IQueryable</a><span id="LSTDA85B5D5_19"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_19?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="selflink"><span class="typeparameter">TSource</span></span><span id="LSTDA85B5D5_20"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_20?cs=>|vb=)|cpp=>|fs=>|nu=)");</script><br />An IQueryable partitioned according to a list of keys determined at runtime<h4 class="subHeading">Usage Note</h4>In Visual Basic and C#, you can call this method as an instance method on any object of type <a href="http://msdn2.microsoft.com/en-us/library/bb351562" target="_blank">IQueryable</a><span id="LSTDA85B5D5_21"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_21?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script><span class="selflink"><span class="typeparameter">TSource</span></span><span id="LSTDA85B5D5_22"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA85B5D5_22?cs=>|vb=)|cpp=>|fs=>|nu=)");</script>. When you use instance method syntax to call this method, omit the first parameter. For more information, see <a href="http://msdn.microsoft.com/en-us/library/bb384936.aspx" target="_blank">Extension Methods (Visual Basic)</a> or <a href="http://msdn.microsoft.com/en-us/library/bb383977.aspx" target="_blank">Extension Methods (C# Programming Guide)</a>.<div class="OH_CollapsibleAreaRegion" id="seeAlsoSection"><div class="OH_regiontitle">See Also</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><h4 class="subHeading">Reference</h4><div class="seeAlsoStyle"><a href="6d67ec6b-96ed-0a8b-0ad4-1c0568c7bf91.htm">DryadLinqQueryable Class</a></div><div class="seeAlsoStyle"><a href="f90db211-91a6-9160-f0b1-f7b5d6267e24.htm">RangePartition Overload</a></div><div class="seeAlsoStyle"><a href="efe6507e-9fd8-bbd3-8227-fd6ba9e289c1.htm">Microsoft.Research.DryadLinq Namespace</a></div></div></div></div></div><div id="OH_footer" class="OH_footer"> </div></body></html> |