1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>Isolation Enumeration</title><link rel="stylesheet" type="text/css" href="../styles/presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="BerkeleyDB" /><meta name="file" content="T_BerkeleyDB_Isolation" /><meta name="guid" content="T_BerkeleyDB_Isolation" /><xml><MSHelp:Attr Name="AssetID" Value="T:BerkeleyDB.Isolation" /><MSHelp:TOCTitle Title="Isolation Enumeration" /><MSHelp:RLTitle Title="Isolation Enumeration (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="T:BerkeleyDB.Isolation" /><MSHelp:Keyword Index="A" Term="F:BerkeleyDB.Isolation.DEGREE_ONE" /><MSHelp:Keyword Index="A" Term="F:BerkeleyDB.Isolation.DEGREE_TWO" /><MSHelp:Keyword Index="A" Term="F:BerkeleyDB.Isolation.DEGREE_THREE" /><MSHelp:Keyword Index="A" Term="frlrfBerkeleyDBIsolationClassTopic" /><MSHelp:Keyword Index="K" Term="Isolation enumeration" /><MSHelp:Keyword Index="K" Term="BerkeleyDB.Isolation enumeration" /><MSHelp:Keyword Index="K" Term="DEGREE_ONE enumeration member" /><MSHelp:Keyword Index="K" Term="DEGREE_TWO enumeration member" /><MSHelp:Keyword Index="K" Term="DEGREE_THREE enumeration member" /><MSHelp:Keyword Index="F" Term="Isolation" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.Isolation" /><MSHelp:Keyword Index="F" Term="Isolation.DEGREE_ONE" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.Isolation.DEGREE_ONE" /><MSHelp:Keyword Index="F" Term="Isolation.DEGREE_TWO" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.Isolation.DEGREE_TWO" /><MSHelp:Keyword Index="F" Term="Isolation.DEGREE_THREE" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.Isolation.DEGREE_THREE" /><MSHelp:Attr Name="HelpPriority" Value="2" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet53.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.Isolation" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.Isolation.DEGREE_ONE" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.Isolation.DEGREE_TWO" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.Isolation.DEGREE_THREE" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="Specify the degree of isolation for transactional operations" /><MSHelp:Attr Name="AssemblyVersion" Value="5.3.28.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" title="Collapse image" /><img id="expandImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" title="Expand Image" /><img id="collapseAllImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" /><img id="expandAllImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" /><img id="dropDownImage" style="display:none; height:0; width:0;" src="../icons/dropdown.gif" /><img id="dropDownHoverImage" style="display:none; height:0; width:0;" src="../icons/dropdownHover.gif" /><img id="copyImage" style="display:none; height:0; width:0;" src="../icons/copycode.gif" title="Copy image" /><img id="copyHoverImage" style="display:none; height:0; width:0;" src="../icons/copycodeHighlight.gif" title="CopyHover image" /><div id="header"><table id="topTable" cellspacing="0" cellpadding="0"><tr><td><span onclick="ExpandCollapseAll(toggleAllImage)" style="cursor:default;" onkeypress="ExpandCollapseAll_CheckKey(toggleAllImage, event)" tabindex="0"><img ID="toggleAllImage" class="toggleAll" src="../icons/collapse_all.gif" /> <label id="collapseAllLabel" for="toggleAllImage" style="display: none;">Collapse All</label><label id="expandAllLabel" for="toggleAllImage" style="display: none;">Expand All</label> </span><span> </span><span id="devlangsDropdown" class="filter" tabindex="0"><img id="devlangsDropdownImage" src="../icons/dropdown.gif" /> <label id="devlangsMenuAllLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: All </nobr></label><label id="devlangsMenuMultipleLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Multiple </nobr></label><label id="devlangsMenuCSharpLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: C# </nobr></label><label id="devlangsMenuVisualBasicLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Visual Basic </nobr></label><label id="devlangsMenuManagedCPlusPlusLabel" for="devlangsDropdownImage" style="display: none;"><nobr>Code: Visual C++ </nobr></label></span></td></tr></table><div id="devlangsMenu"><input id="CSharpCheckbox" type="checkbox" data="CSharp,cs,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="CSharpCheckbox">C#</label><br /><input id="VisualBasicCheckbox" type="checkbox" data="VisualBasic,vb,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="VisualBasicCheckbox">Visual Basic</label><br /><input id="ManagedCPlusPlusCheckbox" type="checkbox" data="ManagedCPlusPlus,cpp,'persist'" value="on" onClick="SetLanguage(this)" /><label class="checkboxLabel" for="ManagedCPlusPlusCheckbox">Visual C++</label><br /></div><table id="bottomTable" cellpadding="0" cellspacing="0"><tr id="headerTableRow1"><td align="left"><span id="runningHeaderText">Berkeley DB .NET API Documentation</span></td></tr><tr id="headerTableRow2"><td align="left"><span id="nsrTitle">Isolation Enumeration</span></td></tr><tr id="headerTableRow3"><td align="left"><a href="#seeAlsoToggle" onclick="OpenSection(seeAlsoToggle)">See Also</a>
<span id="headfeedbackarea" class="feedbackhead">
<a href="javascript:SubmitFeedback('','Berkeley DB .NET API Documentation','','','','%0\dYour%20feedback%20is%20used%20to%20improve%20the%20documentation%20and%20the%20product.%20Your%20e-mail%20address%20will%20not%20be%20used%20for%20any%20other%20purpose%20and%20is%20disposed%20of%20after%20the%20issue%20you%20report%20is%20resolved.%20%20While%20working%20to%20resolve%20the%20issue%20that%20you%20report,%20you%20may%20be%20contacted%20via%20e-mail%20to%20get%20further%20details%20or%20clarification%20on%20the%20feedback%20you%20sent.%20After%20the%20issue%20you%20report%20has%20been%20addressed,%20you%20may%20receive%20an%20e-mail%20to%20let%20you%20know%20that%20your%20feedback%20has%20been%20addressed.%0\A%0\d','Customer%20Feedback');">
Send Feedback
</a>
</span>
</td></tr></table><table id="gradientTable"><tr><td class="nsrBottom" background="../icons/gradient.gif" /></tr></table></div><div id="mainSection"><div id="mainBody"><div id="allHistory" class="saveHistory" onsave="saveAll()" onload="loadAll()" /><span style="color: DarkGray"> </span><div class="summary">
Specify the degree of isolation for transactional operations
</div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">enum</span> <span class="identifier">Isolation</span></pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Enumeration</span> <span class="identifier">Isolation</span></pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">enum class</span> <span class="identifier">Isolation</span></pre></td></tr></table></span></div></div><div id="enumerationSection"><h1 class="heading"><span onclick="ExpandCollapse(membersToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(membersToggle, event)" tabindex="0"><img id="membersToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Members</span></h1><div id="membersSection" class="section" name="collapseableSection" style=""><table class="members" id="memberList" frame="lhs" cellpadding="2"><col width="10%" /><tr><th class="iconColumn" /><th class="nameColumn">Member name</th><th class="descriptionColumn">Description</th></tr><tr><td /><td target="F:BerkeleyDB.Isolation.DEGREE_ONE"><span class="selflink">DEGREE_ONE</span></td><td><div class="summary">
Read operations on the database may request the return of modified
but not yet committed data.
</div></td></tr><tr><td /><td target="F:BerkeleyDB.Isolation.DEGREE_TWO"><span class="selflink">DEGREE_TWO</span></td><td><div class="summary">
Provide for cursor stability but not repeatable reads. Data items
which have been previously read by a transaction may be deleted or
modified by other transactions before the original transaction
completes.
</div></td></tr><tr><td /><td target="F:BerkeleyDB.Isolation.DEGREE_THREE"><span class="selflink">DEGREE_THREE</span></td><td><div class="summary">
For the life of the transaction, every time a thread of control
reads a data item, it will be unchanged from its previous value
(assuming, of course, the thread of control does not itself modify
the item). This is Berkeley DB's default degree of isolation.
</div></td></tr></table></div></div><h1 class="heading"><span onclick="ExpandCollapse(seeAlsoToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(seeAlsoToggle, event)" tabindex="0"><img id="seeAlsoToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />See Also</span></h1><div id="seeAlsoSection" class="section" name="collapseableSection" style=""><div class="seeAlsoStyle"><a href="N_BerkeleyDB.htm">BerkeleyDB Namespace</a></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"> </span>
Report Feedback on this item in the Oracle Technology Network Forum <p />Copyright (c) 2008, 2013 Oracle. All rights reserved.</div></div></body></html>
|
