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| <h1>Show the details of an Arrow Execution Plan</h1> |
| <small class="dont-index">Source: <a href="https://github.com/apache/arrow/blob/main/r/R/dplyr.R" class="external-link"><code>R/dplyr.R</code></a></small> |
| <div class="d-none name"><code>show_exec_plan.Rd</code></div> |
| </div> |
| |
| <div class="ref-description section level2"> |
| <p>This is a function which gives more details about the logical query plan |
| that will be executed when evaluating an <code>arrow_dplyr_query</code> object. |
| It calls the C++ <code>ExecPlan</code> object's print method. |
| Functionally, it is similar to <code><a href="https://dplyr.tidyverse.org/reference/explain.html" class="external-link">dplyr::explain()</a></code>. This function is used as |
| the <code><a href="https://dplyr.tidyverse.org/reference/explain.html" class="external-link">dplyr::explain()</a></code> and <code><a href="https://dplyr.tidyverse.org/reference/explain.html" class="external-link">dplyr::show_query()</a></code> methods.</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">show_exec_plan</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span></code></pre></div> |
| </div> |
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| <div class="section level2"> |
| <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2> |
| |
| |
| <dl><dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt> |
| <dd><p>an <code>arrow_dplyr_query</code> to print the <code>ExecPlan</code> for.</p></dd> |
| |
| </dl></div> |
| <div class="section level2"> |
| <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2> |
| <p><code>x</code>, invisibly.</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 class="va">mtcars</span> <span class="op">|></span></span></span> |
| <span class="r-in"><span> <span class="fu"><a href="table.html">arrow_table</a></span><span class="op">(</span><span class="op">)</span> <span class="op">|></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">></span> <span class="fl">20</span><span class="op">)</span> <span class="op">|></span></span></span> |
| <span class="r-in"><span> <span class="fu"><a href="https://dplyr.tidyverse.org/reference/mutate.html" class="external-link">mutate</a></span><span class="op">(</span>x <span class="op">=</span> <span class="va">gear</span> <span class="op">/</span> <span class="va">carb</span><span class="op">)</span> <span class="op">|></span></span></span> |
| <span class="r-in"><span> <span class="fu">show_exec_plan</span><span class="op">(</span><span class="op">)</span></span></span> |
| <span class="r-out co"><span class="r-pr">#></span> ExecPlan with 4 nodes:</span> |
| <span class="r-out co"><span class="r-pr">#></span> 3:SinkNode{}</span> |
| <span class="r-out co"><span class="r-pr">#></span> 2:ProjectNode{projection=[mpg, cyl, disp, hp, drat, wt, qsec, vs, am, gear, carb, "x": divide(cast(gear, {to_type=double, allow_int_overflow=false, allow_time_truncate=false, allow_time_overflow=false, allow_decimal_truncate=false, allow_float_truncate=false, allow_invalid_utf8=false}), cast(carb, {to_type=double, allow_int_overflow=false, allow_time_truncate=false, allow_time_overflow=false, allow_decimal_truncate=false, allow_float_truncate=false, allow_invalid_utf8=false}))]}</span> |
| <span class="r-out co"><span class="r-pr">#></span> 1:FilterNode{filter=(mpg > 20)}</span> |
| <span class="r-out co"><span class="r-pr">#></span> 0:TableSourceNode{}</span> |
| </code></pre></div> |
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