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Lu, Huayi 27019c2991 DWS TOOL 830.201 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:35:25 +00:00

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<a name="EN-US_TOPIC_0000001772696268"></a><a name="EN-US_TOPIC_0000001772696268"></a>
<h1 class="topictitle1">Bitmap Index</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_p5449133416273">There is a configuration parameter that is introduced for this feature named <strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b9622203522416">BitmapIndexSupport</strong> which default value is <strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b18281401987">comment</strong>, then the sample input and output are as follows:</p>
<p id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_p20450103412272"><strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b452317172716">Input – Bitmap index</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_screen1445093462715"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="n">BITMAP</span><span class="w"> </span><span class="k">INDEX</span><span class="w"> </span>
<span class="n">emp_bitmap_idx</span>
<span class="k">ON</span><span class="w"> </span><span class="n">index_demo</span><span class="w"> </span><span class="p">(</span><span class="n">gender</span><span class="p">);</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_p0450123410275"><strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b185215176274">Output</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_screen12450234182715"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="cm">/*CREATE BITMAP INDEX emp_bitmap_idx ON index_demo (gender);*/</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_p15450123416272">However, if the configuration parameter is set to <strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b994711252245">BTREE</strong>, then the output is as follows:</p>
<p id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_p3450634152716"><strong id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0237712475_b953151717279">Output</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772696268__en-us_topic_0000001658024650_en-us_topic_0238518378_en-us_topic_0238226700_en-us_topic_0221101041_en-us_topic_0202727461_screen1945043410273"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span>
<span class="w"> </span><span class="cm">/*bitmap*/</span>
<span class="w"> </span><span class="k">INDEX</span><span class="w"> </span><span class="n">emp_bitmap_idx</span>
<span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">index_demo</span>
<span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="n">btree</span><span class="w"> </span><span class="p">(</span><span class="n">gender</span><span class="p">)</span><span class="w"> </span><span class="p">;</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_mt_0104.html">Oracle Syntax Migration</a></div>
</div>
</div>
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