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      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Author</dt>
      <dd style="margin-left: 8.5em">Kouhei Sutou &lt;kou****@clear*****&gt;</dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Date</dt>
      <dd style="margin-left: 8.5em">2015-01-27 12:53:50 +0900 (Tue, 27 Jan 2015)</dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">New Revision</dt>
      <dd style="margin-left: 8.5em"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2">0ffc071ba5d66b03dec9a05f506ab571cfa19bd2</a></dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Message</dt>
      <dd style="margin-left: 8.5em"><pre style="border: 1px solid #aaa; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; padding: 0.5em; width: auto">doc select drilldown_calc_target: add</pre></dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Modified files</dt>
      <dd style="margin-left: 8.5em">
        <ul>
          <li><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#diff-0">doc/source/reference/commands/select.rst</a></li>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">  Modified: doc/source/reference/commands/select.rst (+25 -0)</span>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1296">...</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1298">1298</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1299">1299</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1300">1300</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1301">1301</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0L1302">1302</a></span>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0R1296">...</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0R1297">1297</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0R1298">1298</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/groonga/commit/0ffc071ba5d66b03dec9a05f506ab571cfa19bd2#L0R1299">1299</a></span>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -1297,6 +1297,31 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">The default value of ``drilldown_calc_types`` is ``NONE``. It means</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> that only ``COUNT`` is enabled. Because ``NONE`` is just ignored and</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> ``COUNT`` is always enabled.</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+.. _select-drilldown-calc-target:</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+``drilldown_calc_target``</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;&quot;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+It specifies the target column for :ref:`select-drilldown-calc-types`.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+If you specify a calculation type that needs a target column such as</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+``MAX`` in :ref:`select-drilldown-calc-types` but you omit</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+``drilldown_calc_target``, the calculation result is always ``0``.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+You can specify only one column name like ``--drilldown_calc_target</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+n_likes``. You can't specify multiple column name like</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+``--drilldown_calc_target _key,n_likes``.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+You can use referenced value from the target record by combining</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+&quot;``.``&quot; like ``--drilldown_calc_target</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+reference_column.nested_reference_column.value``.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+See :ref:`select-drilldown-calc-types` to know how to use</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+``drilldown_calc_target``.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+The default value of ``drilldown_calc_target`` is ``null``. It means</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+that no calculation target column is specified.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> .. _select-advanced-drilldown-related-parameters:</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-not-changed" style="display: block; white-space: pre"> Advanced drilldown related parameters</span>
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