vpruthi/doc-exports
1
0
Fork 0
forked from docs/doc-exports
Code Pull Requests Activity
doc-exports/docs/dws/dev/dws_06_0324.html
Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
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 07:24:04 +00:00

267 lines
32 KiB
HTML
Raw Blame History

<a name="EN-US_TOPIC_0000001495346845"></a><a name="EN-US_TOPIC_0000001495346845"></a>
<h1 class="topictitle1">Roaring Bitmap Aggregation Functions</h1>
<div id="body0000001495346845"><p id="EN-US_TOPIC_0000001495346845__p935914190418">Since 8.1.3, GaussDB(DWS) supports efficient bitmap processing functions and operators, which can be used in user profiling and precision marketing, greatly improving query performance.</p>
<div class="section" id="EN-US_TOPIC_0000001495346845__section12305164194017"><h4 class="sectiontitle">rb_build_agg(int)</h4><p id="EN-US_TOPIC_0000001495346845__p15298104164017">Description: Aggregates int values in a group into a RoaringBitmap value.</p>
<p id="EN-US_TOPIC_0000001495346845__p1029884174012">Return type: RoaringBitmap</p>
<p id="EN-US_TOPIC_0000001495346845__p15298114134014">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen03005419408"><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>
<span class="normal">6</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span><span class="p">(</span><span class="n">a</span><span class="w"> </span><span class="nb">int</span><span class="w"> </span><span class="p">,</span><span class="n">b</span><span class="w"> </span><span class="nb">int</span><span class="p">);</span>
<span class="n">NOTICE</span><span class="p">:</span><span class="w"> </span><span class="n">The</span><span class="w"> </span><span class="s1">'DISTRIBUTE BY'</span><span class="w"> </span><span class="n">clause</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="k">not</span><span class="w"> </span><span class="n">specified</span><span class="p">.</span><span class="w"> </span><span class="k">Using</span><span class="w"> </span><span class="n">round</span><span class="o">-</span><span class="n">robin</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">distribution</span><span class="w"> </span><span class="k">mode</span><span class="w"> </span><span class="k">by</span><span class="w"> </span><span class="k">default</span><span class="p">.</span>
<span class="n">HINT</span><span class="p">:</span><span class="w"> </span><span class="n">Please</span><span class="w"> </span><span class="n">use</span><span class="w"> </span><span class="s1">'DISTRIBUTE BY'</span><span class="w"> </span><span class="n">clause</span><span class="w"> </span><span class="k">to</span><span class="w"> </span><span class="n">specify</span><span class="w"> </span><span class="n">suitable</span><span class="w"> </span><span class="k">data</span><span class="w"> </span><span class="n">distribution</span><span class="w"> </span><span class="k">column</span><span class="p">.</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span>
<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span><span class="k">SELECT</span><span class="w"> </span><span class="n">generate_series</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">10</span><span class="p">),</span><span class="n">generate_series</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">20</span><span class="p">,</span><span class="mi">2</span><span class="p">);</span>
<span class="k">INSERT</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="mi">10</span>
</pre></div></td></tr></table></div>
</div>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen1030120415400"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">rb_iterate</span><span class="p">(</span><span class="n">rb_build_agg</span><span class="p">(</span><span class="n">b</span><span class="p">))</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">t1</span><span class="p">;</span>
<span class="n">rb_iterate</span>
<span class="c1">------------</span>
<span class="mi">1</span>
<span class="mi">3</span>
<span class="mi">5</span>
<span class="mi">7</span>
<span class="mi">9</span>
<span class="mi">11</span>
<span class="mi">13</span>
<span class="mi">15</span>
<span class="mi">17</span>
<span class="mi">19</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section1189061054011"><h4 class="sectiontitle">rb_and_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p198860102405">Description: Aggregates data of the Roaring bitmaps in a group into a Roaring bitmap set based on the INTERSECT operation.</p>
<p id="EN-US_TOPIC_0000001495346845__p19886141024013">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen1988710100402"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span>
<span class="normal">15</span>
<span class="normal">16</span>
<span class="normal">17</span>
<span class="normal">18</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">r1</span><span class="p">(</span><span class="n">a</span><span class="w"> </span><span class="nb">int</span><span class="w"> </span><span class="p">,</span><span class="n">b</span><span class="w"> </span><span class="n">roaringbitmap</span><span class="p">);</span>
<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_build_agg</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="p">;</span>
<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span><span class="k">SELECT</span><span class="w"> </span><span class="n">generate_series</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">10</span><span class="p">),</span><span class="n">generate_series</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">20</span><span class="p">,</span><span class="mi">4</span><span class="p">);</span>
<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_build_agg</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_to_array</span><span class="p">(</span><span class="n">rb_and_agg</span><span class="p">(</span><span class="n">b</span><span class="p">))</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="p">;</span>
<span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_to_array</span>
<span class="c1">----+-------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">1</span><span class="err">}</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">3</span><span class="err">}</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">5</span><span class="err">}</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">7</span><span class="err">}</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">9</span><span class="err">}</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">11</span><span class="err">}</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">13</span><span class="err">}</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">15</span><span class="err">}</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">17</span><span class="err">}</span>
<span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">19</span><span class="err">}</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section10411149406"><h4 class="sectiontitle">rb_or_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p200314104013">Description: Combines Roaring bitmaps in a group into one Roaring bitmap based on the UNION logic.</p>
<p id="EN-US_TOPIC_0000001495346845__p12051424020">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen7116145409"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_to_array</span><span class="p">(</span><span class="n">rb_or_agg</span><span class="p">(</span><span class="n">b</span><span class="p">))</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="p">;</span>
<span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_to_array</span>
<span class="c1">----+-------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">1</span><span class="err">}</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">3</span><span class="p">,</span><span class="mi">5</span><span class="err">}</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">5</span><span class="p">,</span><span class="mi">9</span><span class="err">}</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">7</span><span class="p">,</span><span class="mi">13</span><span class="err">}</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">9</span><span class="p">,</span><span class="mi">17</span><span class="err">}</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">1</span><span class="p">,</span><span class="mi">11</span><span class="err">}</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">5</span><span class="p">,</span><span class="mi">13</span><span class="err">}</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">9</span><span class="p">,</span><span class="mi">15</span><span class="err">}</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">13</span><span class="p">,</span><span class="mi">17</span><span class="err">}</span>
<span class="w"> </span><span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">17</span><span class="p">,</span><span class="mi">19</span><span class="err">}</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section980211634013"><h4 class="sectiontitle">rb_xor_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p18800121614401">Description: Combines Roaring bitmaps in a group into one Roaring bitmap based on the XOR logic.</p>
<p id="EN-US_TOPIC_0000001495346845__p11800916104011">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen6800171694013"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_to_array</span><span class="p">(</span><span class="n">rb_xor_agg</span><span class="p">(</span><span class="n">b</span><span class="p">))</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="p">;</span>
<span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_to_array</span>
<span class="c1">----+-------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{}</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">5</span><span class="err">}</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">9</span><span class="err">}</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">13</span><span class="err">}</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">17</span><span class="err">}</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">1</span><span class="err">}</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">5</span><span class="err">}</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">9</span><span class="err">}</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">13</span><span class="err">}</span>
<span class="w"> </span><span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="err">{</span><span class="mi">17</span><span class="err">}</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section10437920114019"><h4 class="sectiontitle">rb_and_cardinality_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p543542014400">Description: Cardinality of Roaring bitmaps in a group calculated based on INTERSECT.</p>
<p id="EN-US_TOPIC_0000001495346845__p1543552094017">Return type: int</p>
<p id="EN-US_TOPIC_0000001495346845__p10435520174010">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen7436202020407"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_and_cardinality_agg</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_and_cardinality_agg</span>
<span class="c1">----+------------------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section9652423174019"><h4 class="sectiontitle">rb_or_cardinality_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p1565114234408">Description: Cardinality of Roaring bitmaps in a group calculated based on UNION.</p>
<p id="EN-US_TOPIC_0000001495346845__p1465119234405">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen1365117238404"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_or_cardinality_agg</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_or_cardinality_agg</span>
<span class="c1">----+-----------------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="w"> </span><span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495346845__section106571326194016"><h4 class="sectiontitle">rb_xor_cardinality_agg(roaringbitmap)</h4><p id="EN-US_TOPIC_0000001495346845__p46561726144012">Description: Cardinality of Roaring bitmaps in a group calculated based on XOR.</p>
<p id="EN-US_TOPIC_0000001495346845__p146561826174015">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495346845__screen1565717268409"><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>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="n">rb_xor_cardinality_agg</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">r1</span><span class="w"> </span><span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">rb_xor_cardinality_agg</span>
<span class="c1">----+------------------------</span>
<span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span>
<span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">7</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">8</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="w"> </span><span class="mi">10</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1</span>
<span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_06_0991.html">Roaring Bitmap Functions and Operators</a></div>
</div>
</div>
View Git Blame Copy Permalink