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| <div class="refsect1"> |
| <h2 class="refsect1"><font face="arial, helvetica, sans-serif" color="#330099">exclusive-connection</font></h2> |
| <p>Use <code>eclipselink.exclusive-connection</code> to specify if the query should use the exclusive (transactional/write) connection.</p> |
| <a id="sthref541" name="sthref541"></a> |
| <p><strong><br /><span class="refsubsect">Values</span></strong></p> |
| <p><a href="#BABGGEAH">Table 4-8</a> describes this query hint's values.</p> |
| <div class="tblhruleformalwide"><a id="TLJPA748" name="TLJPA748"></a><a id="sthref542" name="sthref542"></a><a id="BABGGEAH" name="BABGGEAH"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Table 4-8 Valid Values for exclusive-connection</font></em></strong></p> |
| <table class="HRuleFormalWide" title="Valid Values for exclusive-connection" summary="Valid values for this extension" dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0"> |
| <col width="29%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t11"><font face="Arial, Helvetica, sans-serif"><strong>Value</strong></font></th> |
| <th align="left" valign="bottom" id="r1c2-t11"><font face="Arial, Helvetica, sans-serif"><strong>Description</strong></font></th> |
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| <td align="left" id="r2c1-t11" headers="r1c1-t11"> |
| <p>true</p> |
| </td> |
| <td align="left" headers="r2c1-t11 r1c2-t11"> |
| <p>The query is executed through the exclusive connection.</p> |
| </td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t11" headers="r1c1-t11"> |
| <p>false</p> |
| </td> |
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| <p><strong><br /><span class="refsubsect">Usage</span></strong></p> |
| <p>This is valid only when an <code>EXCLUSIVE_CONNECTION_MODE</code> property has been set for the persistence unit (such as VPD). If a <code><a href="p_jdbc_exclusiveconnection_mode.htm#CACBICGG2">jdbc.exclusive-connection.mode</a></code> has been configured, use this query hint to ensure that the query is executed through the exclusive connection.</p> |
| <p>This may be required in certain cases, such as when database security prevents a query joining to a secure table from returning the correct results, when executed through the shared connection.</p> |
| <a id="sthref544" name="sthref544"></a> |
| <p><strong><br /><span class="refsubsect">Examples</span></strong></p> |
| <div class="example"><a id="TLJPA749" name="TLJPA749"></a><a id="sthref545" name="sthref545"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 4-17 Using exclusive-connection in a JPA Query</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| import org.eclipse.persistence.config.HintValues; |
| import org.eclipse.persistence.config.QueryHints; |
| query.setHint("eclipselink.EXCLUSIVE_CONNECTION", "TRUE"); |
| |
| </pre></div> |
| <!-- class="example" --> |
| <div class="example"><a id="TLJPA750" name="TLJPA750"></a><a id="sthref546" name="sthref546"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 4-18 Using exclusive-connection in a @QueryHint Annotation</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| import org.eclipse.persistence.config.HintValues; |
| import org.eclipse.persistence.config.QueryHints; |
| @QueryHint(name=QueryHints.EXCLUSIVE_CONNECTION, value="TRUE"); |
| |
| </pre></div> |
| <!-- class="example" --> |
| <a id="sthref547" name="sthref547"></a> |
| <p><strong><br /><span class="refsubsect">See Also</span></strong></p> |
| <p>For more information, see:</p> |
| <ul> |
| <li> |
| <p><a href="p_jdbc_exclusiveconnection_mode.htm#CACBICGG2">"jdbc.exclusive-connection.mode"</a></p> |
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