classdbtimeseriesprocessor.html

FastDb是高效的内存数据库系统

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<dl compact><dt><b>Returns:</b></dt><dd><code>true</code> if element with specifed times exists in time series </dd></dl>
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<a class="anchor" name="dbTimeSeriesProcessora8" doxytag="dbTimeSeriesProcessor::getFirstInterval" ></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> size_t <a class="el" href="classdbTimeSeriesProcessor.html">dbTimeSeriesProcessor</a>&lt; T &gt;::getFirstInterval </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname" nowrap> <em>oid</em>, </td>
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          <td class="md" nowrap>time_t&nbsp;</td>
          <td class="mdname" nowrap> <em>till</em>, </td>
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          <td class="md" nowrap>T *&nbsp;</td>
          <td class="mdname" nowrap> <em>buf</em>, </td>
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          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>bufSize</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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<p>
Select first N elements of times series with timestamp less than or equal to specified <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>oid</em>&nbsp;</td><td>time series identifer (OID of the object associated with this time series) </td></tr>
    <tr><td valign=top><em>till</em>&nbsp;</td><td>inclusive high bound for element timestamp (set INFINITE_TIME to disable this criteria) </td></tr>
    <tr><td valign=top><em>buf</em>&nbsp;</td><td>destination buffer for selected elements </td></tr>
    <tr><td valign=top><em>bufSize</em>&nbsp;</td><td>size of buffer: up to bufSize elements will be placed in buffer </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected elements (can be less than bufSize if there are less elements in time series with timestamp less or equal than specified, but can not be greater than bufSize) </dd></dl>
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<a class="anchor" name="dbTimeSeriesProcessora3" doxytag="dbTimeSeriesProcessor::getFirstTime" ></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> time_t <a class="el" href="classdbTimeSeriesProcessor.html">dbTimeSeriesProcessor</a>&lt; T &gt;::getFirstTime </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>oid</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline]</code></td>
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<p>
Get the time of the first element in time series <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>oid</em>&nbsp;</td><td>time series identifer (OID of the object associated with this time series) </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>earliest time in times series or -1 if there are no elements in time series </dd></dl>
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<a class="anchor" name="dbTimeSeriesProcessora6" doxytag="dbTimeSeriesProcessor::getInterval" ></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> size_t <a class="el" href="classdbTimeSeriesProcessor.html">dbTimeSeriesProcessor</a>&lt; T &gt;::getInterval </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname" nowrap> <em>oid</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>time_t&nbsp;</td>
          <td class="mdname" nowrap> <em>from</em>, </td>
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          <td></td>
          <td class="md" nowrap>time_t&nbsp;</td>
          <td class="mdname" nowrap> <em>till</em>, </td>
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          <td class="md" nowrap>T *&nbsp;</td>
          <td class="mdname" nowrap> <em>buf</em>, </td>
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          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>bufSize</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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<p>
Select elements belonging to the specified interval <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>oid</em>&nbsp;</td><td>time series identifer (OID of the object associated with this time series) </td></tr>
    <tr><td valign=top><em>from</em>&nbsp;</td><td>inclusive low bound for element timestamp (set 0 to disable this criteria) </td></tr>
    <tr><td valign=top><em>till</em>&nbsp;</td><td>inclusive high bound for element timestamp (set INFINITE_TIME to disable this criteria) </td></tr>
    <tr><td valign=top><em>buf</em>&nbsp;</td><td>destination buffer for selected elements </td></tr>
    <tr><td valign=top><em>bufSize</em>&nbsp;</td><td>size of buffer: up to bufSize elements will be placed in buffer </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of elements belonging to the specified interval (can be greater than bufSize) </dd></dl>
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<a class="anchor" name="dbTimeSeriesProcessora9" doxytag="dbTimeSeriesProcessor::getLastInterval" ></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> size_t <a class="el" href="classdbTimeSeriesProcessor.html">dbTimeSeriesProcessor</a>&lt; T &gt;::getLastInterval </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname" nowrap> <em>oid</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>time_t&nbsp;</td>
          <td class="mdname" nowrap> <em>from</em>, </td>
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          <td></td>
          <td class="md" nowrap>T *&nbsp;</td>
          <td class="mdname" nowrap> <em>buf</em>, </td>
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          <td></td>
          <td></td>
          <td class="md" nowrap>size_t&nbsp;</td>
          <td class="mdname" nowrap> <em>bufSize</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline]</code></td>
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<p>
Select last N elements of times series with timestamp greater than or equal to specified <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign=top><em>oid</em>&nbsp;</td><td>time series identifer (OID of the object associated with this time series) </td></tr>
    <tr><td valign=top><em>from</em>&nbsp;</td><td>inclusive low bound for element timestamp (set 0 to disable this criteria) </td></tr>
    <tr><td valign=top><em>buf</em>&nbsp;</td><td>destination buffer for selected elements </td></tr>
    <tr><td valign=top><em>bufSize</em>&nbsp;</td><td>size of buffer: up to bufSize elements will be placed in buffer </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>number of selected elements (can be less than bufSize if there are less elements in time series with timestamp greater or equal than specified, but can not be greater than bufSize) </dd></dl>
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<a class="anchor" name="dbTimeSeriesProcessora4" doxytag="dbTimeSeriesProcessor::getLastTime" ></a><p>
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template&lt;class T&gt; </td>
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          <td class="md" nowrap valign="top"> time_t <a class="el" href="classdbTimeSeriesProcessor.html">dbTimeSeriesProcessor</a>&lt; T &gt;::getLastTime </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">oid_t&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>oid</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline]</code></td>
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