classdbdatabase.html

俄罗斯牛人KK的作品,著名的ORDBMS,这里上传最新的3.39版本源代码.希望了解对象关系数据库的同好,请不要错过.

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<p>
Assign table to the database <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>desc</em>&nbsp;</td><td>
table descriptor </td></tr>
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<a name="dbSubSqla13" doxytag="dbDatabase::attach"></a><p>
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          <td class="md" nowrap valign="top"> void dbDatabase::attach </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">dbDatabaseThreadContext *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>ctx</em>          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Set transaction context for the current thread. Using this method allows to share the same transaction  between different threads <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>ctx</em>&nbsp;</td><td>
transaction context which will be associated with the current thread </td></tr>
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<a name="dbSubSqla12" doxytag="dbDatabase::attach"></a><p>
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          <td class="md" nowrap valign="top"> void dbDatabase::attach </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp;          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Attach current thread to the database. This method should be executed for all threads except one which opened the database.     </td>
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<a name="dbSubSqla17" doxytag="dbDatabase::backup"></a><p>
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          <td class="md" nowrap valign="top"> bool dbDatabase::backup </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">dbFile *&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>file</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>bool&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>compactify</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>
Perform backup to the specified file <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>file</em>&nbsp;</td><td>
opened file to path to the backup file. This file will not be closed after backup completion.  </td></tr>
<tr><td valign=top><em>comactify</em>&nbsp;</td><td>
if true then databae will be compactificated during backup -  i.e. all used objects will be placed together without holes; if false then  backup is performed by just writting memory mapped object to the backup file. </td></tr>
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</dl><dl compact><dt><b>Returns: </b></dt><dd>
whether backup was succeseful or not </dl>    </td>
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<a name="dbSubSqla16" doxytag="dbDatabase::backup"></a><p>
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          <td class="md" nowrap valign="top"> bool dbDatabase::backup </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">char const *&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>file</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>bool&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>compactify</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>
Perform backup to the file with specified name <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>file</em>&nbsp;</td><td>
path to the backup file </td></tr>
<tr><td valign=top><em>comactify</em>&nbsp;</td><td>
if true then databae will be compactificated during backup -  i.e. all used objects will be placed together without holes; if false then  backup is performed by just writting memory mapped object to the backup file. </td></tr>
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</dl><dl compact><dt><b>Returns: </b></dt><dd>
whether backup was succeseful or not </dl>    </td>
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<a name="dbSubSqlb30" doxytag="dbDatabase::checkVersion"></a><p>
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          <td class="md" nowrap valign="top"> bool dbDatabase::checkVersion </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp;          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [protected]</code></td>
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<p>
Check if program works with correct version of memory mapped object (if memory mapped  object is reallocated by some client, its version number is incremented, so all other client will be able to notice it and also reallocate their memory mapping objects. <dl compact><dt><b>Returns: </b></dt><dd>
true if memory mapping object was successfully reallocated or no reallocation is needed at all </dl>    </td>
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<a name="dbSubSqlb26" doxytag="dbDatabase::cloneBitmap"></a><p>
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          <td class="md" nowrap valign="top"> void dbDatabase::cloneBitmap </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">offs_t&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>pos</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>size</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [protected]</code></td>
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<p>
Clone memory allocation bitmap for region [pos, pos+size) <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>pos</em>&nbsp;</td><td>
start of region </td></tr>
<tr><td valign=top><em>size</em>&nbsp;</td><td>
size of region </td></tr>
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<a name="dbSubSqla7" doxytag="dbDatabase::close"></a><p>
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          <td class="md" nowrap valign="top"> void dbDatabase::close </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp;          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Close database     </td>
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<a name="dbSubSqlb0" doxytag="dbDatabase::commit"></a><p>
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          <td class="md" nowrap valign="top"> void dbDatabase::commit </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">dbDatabaseThreadContext *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>ctx</em>          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [protected]</code></td>
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