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<section>
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<section>
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<h2>The database is in the way</h2>
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<h2>The database is in the way</h2>
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<h3 class="fragment">Why?</h3>
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<section>
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<section>
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<h3>On representing incomplete information in a relational data base</h3>
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<section>
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<h4>T. Imielinski & W. Lipski Jr.<span style="margin-left: 40px">(<i>VLDB <span class="fragment highlight-current-red" data-fragment-index="1">1981</span></i>)</span></h4>
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<h3>On representing incomplete information in a relational data base</h3>
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<p class="fragment" data-fragment-index="1" style="margin-top: 60px">
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<h4>T. Imielinski & W. Lipski Jr.<span style="margin-left: 40px">(<i>VLDB <span class="fragment highlight-current-red" data-fragment-index="1">1981</span></i>)</span></h4>
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Incomplete and Probabilistic Databases<br/>have existed since the 1980s
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<p class="fragment" data-fragment-index="1" style="margin-top: 60px">
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</p>
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Incomplete and Probabilistic Databases<br/>have existed since the 1980s
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<text x="60" y="50">Q(D)</text>
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<text x="60" y="170">Q(D)</text>
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<text x="60" y="290">Q(D)</text>
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<text x="60" y="410">Q(D)</text>
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<text x="40" y="250">?</text>
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<text x="120" y="230">Probab.</text>
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<text x="120" y="280">Cert. A.</text>
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</svg>
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<p class="fragment" data-fragment-index="6" style="font-size: smaller">
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We've gotten good at query processing on uncertain data.<br/>
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<span class="fragment" data-fragment-index="7">But not at "sourcing" uncertain data
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<span class="fragment" data-fragment-index="8">... or communicating results.</span></span>
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</p>
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</section>
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<section>
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<h3>Challenges</h3>
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<ul>
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<li>Where do Probabilities/Possible Worlds Come From?</li>
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<li>How do I use the output of a probablistic DB query?</li>
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<li>Probablistic DB queries are sloooooow.</li>
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</ul>
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<p class="fragment" style="font-size: smaller;">A small shift in how we think about PDBs addresses all three points.</p>
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</section>
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<svg width="800" height="500">
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<g transform="translate(150,0)">
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<h3>It's not the data that's uncertain,<br/>it's the interpretation</h3>
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</section>
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<section>
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<table>
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<tr>
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<th>Time</th><th>Sensor Reading</th><th class="fragment" data-fragment-index="2">Temp Around Sensor</th>
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</tr>
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<tr><td>1</td><td>31.6</td><td class="fragment" data-fragment-index="2">Roughly 31.6˚C</td></tr>
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<tr><td>2</td><td>-999</td><td class="fragment" data-fragment-index="2">Around 30˚C?</td></tr>
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<tr><td>4</td><td>28.1</td><td class="fragment" data-fragment-index="2">Roughly 28.1˚C?</td></tr>
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<tr><td>3</td><td>32.2</td><td class="fragment" data-fragment-index="2">Roughly 32.2˚C</td></tr>
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</table>
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<p class="fragment" data-fragment-index="1">The <i>reading</i> is deterministic</p>
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<p class="fragment" data-fragment-index="2">... but what we care about is what the reading measures</p>
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<text x="150" y="70" >Q<tspan style="font-size: smaller">1</tspan>(D)</text>
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<text x="150" y="190">Q<tspan style="font-size: smaller">2</tspan>(D)</text>
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<text x="150" y="310">Q<tspan style="font-size: smaller">3</tspan>(D)</text>
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<text x="60" y="50">Q(D)</text>
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<text x="60" y="410">Q(D)</text>
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<p style="font-size: smaller; margin-bottom: 0px; margin-top: 0px;"><b>Insight:</b> Treat data as 100% deterministic.</p>
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>Instead, queries propose alternative interpretations.</p>
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<text x="40" y="250">?</text>
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transform="translate(540, 0)"
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<image
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<text x="180" y="190">?</text>
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</svg>
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<p class="fragment" data-fragment-index="4" style="font-size: smaller">
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We've gotten good at query processing on uncertain data.<br/>
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<span class="fragment" data-fragment-index="5">But not at "sourcing" uncertain data
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<span class="fragment" data-fragment-index="6">... or communicating results.</span></span>
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</p>
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</section>
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</section>
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<section>
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<section>
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<section>
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<h3>Effects</h3>
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<h3>It's not the data that's uncertain,<br/>it's the interpretation</h3>
|
<ol>
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</section>
|
<li class="fragment" style="margin-top: 30px;">It's clear where uncertainty comes from.</li>
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<li class="fragment" style="margin-top: 30px;">Results can be communicated through provenance.</li>
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<section>
|
<li class="fragment" style="margin-top: 30px;">Query evaluation is decoupled from physical layout.</li>
|
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<table>
|
</ol>
|
||||||
<tr>
|
</section>
|
||||||
<th>Time</th><th>Sensor Reading</th><th class="fragment" data-fragment-index="2">Temp Around Sensor</th>
|
|
||||||
</tr>
|
|
||||||
<tr><td>1</td><td>31.6</td><td class="fragment" data-fragment-index="2">Roughly 31.6˚C</td></tr>
|
|
||||||
<tr><td>2</td><td>-999</td><td class="fragment" data-fragment-index="2">Around 30˚C?</td></tr>
|
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||||||
<tr><td>4</td><td>28.1</td><td class="fragment" data-fragment-index="2">Roughly 28.1˚C?</td></tr>
|
|
||||||
<tr><td>3</td><td>32.2</td><td class="fragment" data-fragment-index="2">Roughly 32.2˚C</td></tr>
|
|
||||||
</table>
|
|
||||||
<p class="fragment" data-fragment-index="1">The <i>reading</i> is deterministic</p>
|
|
||||||
<p class="fragment" data-fragment-index="2">... but what we care about is what the reading measures</p>
|
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||||||
</section>
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<section>
|
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<svg width="650" height="500">
|
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<image
|
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xlink:href="graphics/db.svg"
|
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width="93" height="103"
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x="0" y="190"
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/>
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<g
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transform="translate(30, 0)"
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style="
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stroke-width: 4;
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stroke: rgba(150, 150, 150, 1);
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<polyline
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<polyline
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points="70,60 140,60 120,50 140,60 120,70 140,60"
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transform="translate(-15,170) rotate(-20)"
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<polyline
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points="70,60 140,60 120,50 140,60 120,70 140,60"
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|
||||||
/>
|
|
||||||
<polyline
|
|
||||||
points="20,60 140,60 120,50 140,60 120,70 140,60"
|
|
||||||
transform="translate(102,240) rotate(60)"
|
|
||||||
/>
|
|
||||||
<text x="150" y="70" >Q<tspan style="font-size: smaller">1</tspan>(D)</text>
|
|
||||||
<text x="150" y="190">Q<tspan style="font-size: smaller">2</tspan>(D)</text>
|
|
||||||
<text x="150" y="310">Q<tspan style="font-size: smaller">3</tspan>(D)</text>
|
|
||||||
<text x="150" y="430">Q<tspan style="font-size: smaller">4</tspan>(D)</text>
|
|
||||||
</g>
|
|
||||||
<g transform="translate(500,0)"
|
|
||||||
style="
|
|
||||||
fill: rgba(200, 50, 50, 0);
|
|
||||||
stroke-width: 4;
|
|
||||||
stroke: rgba(150, 150, 150, 1);
|
|
||||||
">
|
|
||||||
<image
|
|
||||||
xlink:href="graphics/jean-victor-balin-icon-table.svg"
|
|
||||||
width="96" height="96"
|
|
||||||
x="0" y="15"
|
|
||||||
/>
|
|
||||||
<image
|
|
||||||
xlink:href="graphics/jean-victor-balin-icon-table.svg"
|
|
||||||
width="96" height="96"
|
|
||||||
x="0" y="135"
|
|
||||||
/>
|
|
||||||
<image
|
|
||||||
xlink:href="graphics/jean-victor-balin-icon-table.svg"
|
|
||||||
width="96" height="96"
|
|
||||||
x="0" y="255"
|
|
||||||
/>
|
|
||||||
<image
|
|
||||||
xlink:href="graphics/jean-victor-balin-icon-table.svg"
|
|
||||||
width="96" height="96"
|
|
||||||
x="0" y="375"
|
|
||||||
/>
|
|
||||||
</g>
|
|
||||||
<g transform="translate(260,0)"
|
|
||||||
style="
|
|
||||||
fill: rgba(200, 50, 50, 0);
|
|
||||||
stroke-width: 4;
|
|
||||||
stroke: rgba(150, 150, 150, 1);
|
|
||||||
">
|
|
||||||
<polyline
|
|
||||||
points="30,60 220,60 200,50 220,60 200,70 220,60"
|
|
||||||
transform="translate(0,0)"
|
|
||||||
/>
|
|
||||||
<polyline
|
|
||||||
points="30,60 220,60 200,50 220,60 200,70 220,60"
|
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||||||
transform="translate(0,120)"
|
|
||||||
/>
|
|
||||||
<polyline
|
|
||||||
points="30,60 220,60 200,50 220,60 200,70 220,60"
|
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||||||
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|
|
||||||
/>
|
|
||||||
<polyline
|
|
||||||
points="30,60 220,60 200,50 220,60 200,70 220,60"
|
|
||||||
transform="translate(0,360)"
|
|
||||||
/>
|
|
||||||
</g>
|
|
||||||
</svg>
|
|
||||||
<p class="fragment" style="font-size: smaller;"><b>Insight 1:</b> Treat data as 100% deterministic. <br/>Instead, queries propose alternative interpretations.</p>
|
|
||||||
</section>
|
</section>
|
||||||
|
|
||||||
<section>
|
<section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<h3>Non-Deterministic Queries</h3>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<p></p>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<h3>Uncertainty as Provenance</h3>
|
||||||
|
<p>
|
||||||
|
Introduce Best-Guess queries and the idea of explanations. Key points:
|
||||||
|
<ul>
|
||||||
|
<li>Best-guess queries</li>
|
||||||
|
<li>Generating explanations</li>
|
||||||
|
<li>Ranking explanations</li>
|
||||||
|
</ul>
|
||||||
|
</p>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<img src="graphics/mimir_logo_final.png">
|
||||||
|
<h2>Demo</h2>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<h3>Virtualized Uncertainty</h3>
|
||||||
|
<p>
|
||||||
|
Optimizing sampling-based query evaluation
|
||||||
|
</p>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
|
||||||
|
<section>
|
||||||
|
<h3>Schema-Level Uncertainty</h3>
|
||||||
|
</section>
|
||||||
|
|
||||||
</section>
|
</section>
|
||||||
|
|
||||||
</div></div>
|
</div></div>
|
||||||
|
|
Loading…
Reference in a new issue