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<h1>Create a (virtual) DuckDB table from an Arrow object</h1>
<small class="dont-index">Source: <a href="https://github.com/apache/arrow/blob/main/r/R/duckdb.R" class="external-link"><code>R/duckdb.R</code></a></small>
<div class="d-none name"><code>to_duckdb.Rd</code></div>
</div>
<div class="ref-description section level2">
<p>This will do the necessary configuration to create a (virtual) table in DuckDB
that is backed by the Arrow object given. No data is copied or modified until
<code><a href="https://dplyr.tidyverse.org/reference/compute.html" class="external-link">collect()</a></code> or <code><a href="https://dplyr.tidyverse.org/reference/compute.html" class="external-link">compute()</a></code> are called or a query is run against the table.</p>
</div>
<div class="section level2">
<h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">to_duckdb</span><span class="op">(</span></span>
<span> <span class="va">.data</span>,</span>
<span> con <span class="op">=</span> <span class="fu">arrow_duck_connection</span><span class="op">(</span><span class="op">)</span>,</span>
<span> table_name <span class="op">=</span> <span class="fu">unique_arrow_tablename</span><span class="op">(</span><span class="op">)</span>,</span>
<span> auto_disconnect <span class="op">=</span> <span class="cn">TRUE</span></span>
<span><span class="op">)</span></span></code></pre></div>
</div>
<div class="section level2">
<h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
<dl><dt id="arg--data">.data<a class="anchor" aria-label="anchor" href="#arg--data"></a></dt>
<dd><p>the Arrow object (e.g. Dataset, Table) to use for the DuckDB table</p></dd>
<dt id="arg-con">con<a class="anchor" aria-label="anchor" href="#arg-con"></a></dt>
<dd><p>a DuckDB connection to use (default will create one and store it
in <code>options("arrow_duck_con")</code>)</p></dd>
<dt id="arg-table-name">table_name<a class="anchor" aria-label="anchor" href="#arg-table-name"></a></dt>
<dd><p>a name to use in DuckDB for this object. The default is a
unique string <code>"arrow_"</code> followed by numbers.</p></dd>
<dt id="arg-auto-disconnect">auto_disconnect<a class="anchor" aria-label="anchor" href="#arg-auto-disconnect"></a></dt>
<dd><p>should the table be automatically cleaned up when the
resulting object is removed (and garbage collected)? Default: <code>TRUE</code></p></dd>
</dl></div>
<div class="section level2">
<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
<p>A <code>tbl</code> of the new table in DuckDB</p>
</div>
<div class="section level2">
<h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
<p>The result is a dbplyr-compatible object that can be used in d(b)plyr pipelines.</p>
<p>If <code>auto_disconnect = TRUE</code>, the DuckDB table that is created will be configured
to be unregistered when the <code>tbl</code> object is garbage collected. This is helpful
if you don't want to have extra table objects in DuckDB after you've finished
using them.</p>
</div>
<div class="section level2">
<h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="https://dplyr.tidyverse.org" class="external-link">dplyr</a></span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="va">ds</span> <span class="op">&lt;-</span> <span class="va">InMemoryDataset</span><span class="op">$</span><span class="fu">create</span><span class="op">(</span><span class="va">mtcars</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="va">ds</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://dplyr.tidyverse.org/reference/filter.html" class="external-link">filter</a></span><span class="op">(</span><span class="va">mpg</span> <span class="op">&lt;</span> <span class="fl">30</span><span class="op">)</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://dplyr.tidyverse.org/reference/group_by.html" class="external-link">group_by</a></span><span class="op">(</span><span class="va">cyl</span><span class="op">)</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu">to_duckdb</span><span class="op">(</span><span class="op">)</span> <span class="op">|&gt;</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://dplyr.tidyverse.org/reference/slice.html" class="external-link">slice_min</a></span><span class="op">(</span><span class="va">disp</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># Source: SQL [?? x 11]</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># Database: DuckDB 1.4.1 [unknown@Linux 6.11.0-1018-azure:R 4.5.2/:memory:]</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># Groups: cyl</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> mpg cyl disp hp drat wt qsec vs am gear carb</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span> <span style="color: #949494; font-style: italic;">&lt;dbl&gt;</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">1</span> 16.4 8 276. 180 3.07 4.07 17.4 0 0 3 3</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">2</span> 17.3 8 276. 180 3.07 3.73 17.6 0 0 3 3</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">3</span> 15.2 8 276. 180 3.07 3.78 18 0 0 3 3</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">4</span> 27.3 4 79 66 4.08 1.94 18.9 1 1 4 1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">5</span> 19.7 6 145 175 3.62 2.77 15.5 0 1 5 6</span>
</code></pre></div>
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