classdbcursor.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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Get pointer to the last record <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the last record or <code>NULL</code> if no records were selected </dl>    </td>
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<a name="dbCursora3" doxytag="dbCursor::next"></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> T* dbCursor&lt; T &gt;::next </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> [inline]</code></td>
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Get next record <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the next record or <code>NULL</code> if there is no next record </dl>    </td>
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<a name="dbCursora12" doxytag="dbCursor::nextAvailable"></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> T* dbCursor&lt; T &gt;::nextAvailable </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> [inline]</code></td>
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Method nextAvailable allows to iterate through the records in uniform way even when some records  are removed. For example: <pre>
 if (cursor.select(q) &gt; 0) { 
     do { 
         if (x) { 
             cursor.remove();
         } else { 
             cursor.update();
         }
     } while (cursor.nextAvaiable());
  }
     *</pre> <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the current record </dl>    </td>
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<a name="dbCursora8" doxytag="dbCursor::operator->"></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> T* dbCursor&lt; T &gt;::operator-&gt; </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> [inline]</code></td>
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Overloaded operator for accessing components of the current record <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the current record </dl>    </td>
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<a name="dbCursora4" doxytag="dbCursor::prev"></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> T* dbCursor&lt; T &gt;::prev </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> [inline]</code></td>
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Get previous record <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the previous record or <code>NULL</code> if there is no previous record </dl>    </td>
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<a name="dbCursora13" doxytag="dbCursor::prevAvailable"></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> T* dbCursor&lt; T &gt;::prevAvailable </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> [inline]</code></td>
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<p>
Method prevAvailable allows to iterate through the records in uniform way even when some records  are removed. For example: <pre>
 if (cursor.select(q) &gt; 0) { 
     cursor.last();
     do { 
         if (x) { 
             cursor.remove();
         } else { 
             cursor.update();
         }
     } while (cursor.prevAvaiable());
  }
     *</pre> <dl compact><dt><b>Returns: </b></dt><dd>
pointer to the current record </dl>    </td>
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<a name="dbCursor_3_01dbTimeSeriesBlock_3_01T_01_4_01_4a16" doxytag="dbCursor::remove"></a><p>
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          <td class="md" nowrap valign="top"> void dbAnyCursor::remove </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> [inherited]</code></td>
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Remove current record     </td>
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<a name="dbCursor_3_01dbTimeSeriesBlock_3_01T_01_4_01_4a31" doxytag="dbCursor::removeAll"></a><p>
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          <td class="md" nowrap valign="top"> void dbAnyCursor::removeAll </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> [inline, inherited]</code></td>
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Remove all records in the table     </td>
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<a name="dbCursor_3_01dbTimeSeriesBlock_3_01T_01_4_01_4a32" doxytag="dbCursor::removeAllSelected"></a><p>
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          <td class="md" nowrap valign="top"> void dbAnyCursor::removeAllSelected </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> [inherited]</code></td>
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Remove all selected records     </td>
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<a name="dbCursor_3_01dbTimeSeriesBlock_3_01T_01_4_01_4a36" doxytag="dbCursor::reset"></a><p>
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          <td class="md" nowrap valign="top"> void dbAnyCursor::reset </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> [inherited]</code></td>
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Reset cursor 
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Reimplemented from <a class="el" href="classdbL2List.html">dbL2List</a>.    </td>
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<a name="dbCursor_3_01dbTimeSeriesBlock_3_01T_01_4_01_4a42" doxytag="dbCursor::seek"></a><p>
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          <td class="md" nowrap valign="top"> int dbAnyCursor::seek </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>oid</em>          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [inherited]</code></td>
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<p>
Position cursor on the record with the specified OID <dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>oid</em>&nbsp;</td><td>
object identifier of record </td></tr>
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</dl><dl compact><dt><b>Returns: </b></dt><dd>
poistion of the record in the selection or -1 if record with such OID is not in selection </dl>    </td>
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<a name="dbCursora7" doxytag="dbCursor::seek"></a><p>