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<div class="section" id="dbsequence">
<h1>DBSequence<a class="headerlink" href="#dbsequence" title="Permalink to this headline">¶</a></h1>
<p>Read <a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/programmer_reference/index.html">Oracle documentation</a>
for better understanding.</p>
<p>Sequences provide an arbitrary number of persistent objects that return
an increasing or decreasing sequence of integers. Opening a sequence
handle associates it with a record in a database. The handle can
maintain a cache of values from the database so that a database update
is not needed as the application allocates a value.</p>
<p><a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seq.html">More info...</a></p>
<div class="section" id="dbsequence-methods">
<h2>DBSequence Methods<a class="headerlink" href="#dbsequence-methods" title="Permalink to this headline">¶</a></h2>
<dl class="function">
<dt id="DBSequence">
<tt class="descname">DBSequence</tt><big>(</big><em>db</em>, <em>flags=0</em><big>)</big><a class="headerlink" href="#DBSequence" title="Permalink to this definition">¶</a></dt>
<dd><p>Constructor.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqcreate.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="open">
<tt class="descname">open</tt><big>(</big><em>key</em>, <em>txn=None</em>, <em>flags=0</em><big>)</big><a class="headerlink" href="#open" title="Permalink to this definition">¶</a></dt>
<dd><p>Opens the sequence represented by the key.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqopen.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="close">
<tt class="descname">close</tt><big>(</big><em>flags=0</em><big>)</big><a class="headerlink" href="#close" title="Permalink to this definition">¶</a></dt>
<dd><p>Close a DBSequence handle.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqclose.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="initial_value">
<tt class="descname">initial_value</tt><big>(</big><em>value</em><big>)</big><a class="headerlink" href="#initial_value" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the initial value for a sequence. This call is only effective
when the sequence is being created.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqinitial_value.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get">
<tt class="descname">get</tt><big>(</big><em>delta=1</em>, <em>txn=None</em>, <em>flags=0</em><big>)</big><a class="headerlink" href="#get" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the next available element in the sequence and changes the
sequence value by delta.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get_dbp">
<tt class="descname">get_dbp</tt><big>(</big><big>)</big><a class="headerlink" href="#get_dbp" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the DB object associated to the DBSequence.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget_dbp.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get_key">
<tt class="descname">get_key</tt><big>(</big><big>)</big><a class="headerlink" href="#get_key" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the key for the sequence.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget_key.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="remove">
<tt class="descname">remove</tt><big>(</big><em>txn=None</em>, <em>flags=0</em><big>)</big><a class="headerlink" href="#remove" title="Permalink to this definition">¶</a></dt>
<dd><p>Removes the sequence from the database. This method should not be
called if there are other open handles on this sequence.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqremove.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get_cachesize">
<tt class="descname">get_cachesize</tt><big>(</big><big>)</big><a class="headerlink" href="#get_cachesize" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the current cache size.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget_cachesize.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="set_cachesize">
<tt class="descname">set_cachesize</tt><big>(</big><em>size</em><big>)</big><a class="headerlink" href="#set_cachesize" title="Permalink to this definition">¶</a></dt>
<dd><p>Configure the number of elements cached by a sequence handle.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqset_cachesize.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get_flags">
<tt class="descname">get_flags</tt><big>(</big><big>)</big><a class="headerlink" href="#get_flags" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns the current flags.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget_flags.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="set_flags">
<tt class="descname">set_flags</tt><big>(</big><em>flags</em><big>)</big><a class="headerlink" href="#set_flags" title="Permalink to this definition">¶</a></dt>
<dd><p>Configure a sequence.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqset_flags.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="stat">
<tt class="descname">stat</tt><big>(</big><em>flags=0</em><big>)</big><a class="headerlink" href="#stat" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a dictionary of sequence statistics with the following keys:</p>
<blockquote>
<div><table border="1" class="docutils">
<colgroup>
<col width="21%" />
<col width="79%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td>wait</td>
<td>The number of times a thread of control was
forced to wait on the handle mutex.</td>
</tr>
<tr class="row-even"><td>nowait</td>
<td>The number of times that a thread
of control was able to obtain handle mutex
without waiting.</td>
</tr>
<tr class="row-odd"><td>current</td>
<td>The current value of the sequence
in the database.</td>
</tr>
<tr class="row-even"><td>value</td>
<td>The current cached value of the sequence.</td>
</tr>
<tr class="row-odd"><td>last_value</td>
<td>The last cached value of the sequence.</td>
</tr>
<tr class="row-even"><td>min</td>
<td>The minimum permitted value of the sequence.</td>
</tr>
<tr class="row-odd"><td>max</td>
<td>The maximum permitted value of the sequence.</td>
</tr>
<tr class="row-even"><td>cache_size</td>
<td>The number of values that will be cached in
this handle.</td>
</tr>
<tr class="row-odd"><td>flags</td>
<td>The flags value for the sequence.</td>
</tr>
</tbody>
</table>
</div></blockquote>
<p><a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqstat.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="stat_print">
<tt class="descname">stat_print</tt><big>(</big><em>flags=0</em><big>)</big><a class="headerlink" href="#stat_print" title="Permalink to this definition">¶</a></dt>
<dd><p>Prints diagnostic information.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqstat_print.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="get_range">
<tt class="descname">get_range</tt><big>(</big><big>)</big><a class="headerlink" href="#get_range" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a tuple representing the range of values in the sequence.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqget_range.html">More info...</a></p>
</dd></dl>
<dl class="function">
<dt id="set_range">
<tt class="descname">set_range</tt><big>(</big><em>(min</em>, <em>max)</em><big>)</big><a class="headerlink" href="#set_range" title="Permalink to this definition">¶</a></dt>
<dd><p>Configure a sequence range.
<a class="reference external" href="http://docs.oracle.com/cd/E17076_03/html/api_reference/C/seqset_range.html">More info...</a></p>
</dd></dl>
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<li><a class="reference internal" href="#">DBSequence</a><ul>
<li><a class="reference internal" href="#dbsequence-methods">DBSequence Methods</a></li>
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