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 Arrow C Data interface. This data structure can be used to represent an
 arrow::schema(), an arrow::field(), or an arrow::DataType. Note that
 in nanoarrow, an arrow::schema() and a non-nullable arrow::struct()
 are represented identically."><meta property="og:description" content="In nanoarrow a 'schema' refers to a struct ArrowSchema as defined in the
 Arrow C Data interface. This data structure can be used to represent an
 arrow::schema(), an arrow::field(), or an arrow::DataType. Note that
 in nanoarrow, an arrow::schema() and a non-nullable arrow::struct()
 are represented identically."></head><body>
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       <h1>Convert an object to a nanoarrow schema</h1>
       <small class="dont-index">Source: <a href="https://github.com/apache/arrow-nanoarrow/blob/main/r/R/schema.R" class="external-link"><code>R/schema.R</code></a></small>
       <div class="d-none name"><code>as_nanoarrow_schema.Rd</code></div>
     </div>

     <div class="ref-description section level2">
     <p>In nanoarrow a 'schema' refers to a <code>struct ArrowSchema</code> as defined in the
 Arrow C Data interface. This data structure can be used to represent an
 <code><a href="https://arrow.apache.org/docs/r/reference/schema.html" class="external-link">arrow::schema()</a></code>, an <code><a href="https://arrow.apache.org/docs/r/reference/Field-class.html" class="external-link">arrow::field()</a></code>, or an <code><a href="https://arrow.apache.org/docs/r/reference/DataType-class.html" class="external-link">arrow::DataType</a></code>. Note that
 in nanoarrow, an <code><a href="https://arrow.apache.org/docs/r/reference/schema.html" class="external-link">arrow::schema()</a></code> and a non-nullable <code><a href="https://arrow.apache.org/docs/r/reference/data-type.html" class="external-link">arrow::struct()</a></code>
 are represented identically.</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">as_nanoarrow_schema</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
 <span></span>
 <span><span class="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
 <span></span>
 <span><span class="fu">nanoarrow_schema_parse</span><span class="op">(</span><span class="va">x</span>, recursive <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></span>
 <span></span>
 <span><span class="fu">nanoarrow_schema_modify</span><span class="op">(</span><span class="va">x</span>, <span class="va">new_values</span>, validate <span class="op">=</span> <span class="cn">TRUE</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-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
 <dd><p>An object to convert to a schema</p></dd>


 <dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
 <dd><p>Passed to S3 methods</p></dd>


 <dt id="arg-recursive">recursive<a class="anchor" aria-label="anchor" href="#arg-recursive"></a></dt>
 <dd><p>Use <code>TRUE</code> to include a <code>children</code> member when parsing
 schemas.</p></dd>


 <dt id="arg-new-values">new_values<a class="anchor" aria-label="anchor" href="#arg-new-values"></a></dt>
 <dd><p>New schema component to assign</p></dd>


 <dt id="arg-validate">validate<a class="anchor" aria-label="anchor" href="#arg-validate"></a></dt>
 <dd><p>Use <code>FALSE</code> to skip schema validation</p></dd>

 </dl></div>
     <div class="section level2">
     <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
     <p>An object of class 'nanoarrow_schema'</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="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/integer.html" class="external-link">integer</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span></span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> &lt;nanoarrow_schema int32&gt;</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ format    : chr "i"</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ name      : chr ""</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ metadata  : list()</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ flags     : int 2</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ children  : list()</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ dictionary: NULL</span>
 <span class="r-in"><span><span class="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>x <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/integer.html" class="external-link">integer</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> &lt;nanoarrow_schema struct&gt;</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ format    : chr "+s"</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ name      : chr ""</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ metadata  : list()</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ flags     : int 0</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ children  :List of 1</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   ..$ x:&lt;nanoarrow_schema int32&gt;</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ format    : chr "i"</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ name      : chr "x"</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ metadata  : list()</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ flags     : int 2</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ children  : list()</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ dictionary: NULL</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>  $ dictionary: NULL</span>
 <span class="r-in"><span></span></span>
 </code></pre></div>
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	<!DOCTYPE html>
	<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>Convert an object to a nanoarrow schema — as_nanoarrow_schema • nanoarrow</title><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.3.1/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.3.1/bootstrap.bundle.min.js"></script><link href="../deps/font-awesome-6.4.2/css/all.min.css" rel="stylesheet"><link href="../deps/font-awesome-6.4.2/css/v4-shims.min.css" rel="stylesheet"><script src="../deps/headroom-0.11.0/headroom.min.js"></script><script src="../deps/headroom-0.11.0/jQuery.headroom.min.js"></script><script src="../deps/bootstrap-toc-1.0.1/bootstrap-toc.min.js"></script><script src="../deps/clipboard.js-2.0.11/clipboard.min.js"></script><script src="../deps/search-1.0.0/autocomplete.jquery.min.js"></script><script src="../deps/search-1.0.0/fuse.min.js"></script><script src="../deps/search-1.0.0/mark.min.js"></script><!-- pkgdown --><script src="../pkgdown.js"></script><meta property="og:title" content="Convert an object to a nanoarrow schema — as_nanoarrow_schema"><meta name="description" content="In nanoarrow a 'schema' refers to a struct ArrowSchema as defined in the
	Arrow C Data interface. This data structure can be used to represent an
	arrow::schema(), an arrow::field(), or an arrow::DataType. Note that
	in nanoarrow, an arrow::schema() and a non-nullable arrow::struct()
	are represented identically."><meta property="og:description" content="In nanoarrow a 'schema' refers to a struct ArrowSchema as defined in the
	Arrow C Data interface. This data structure can be used to represent an
	arrow::schema(), an arrow::field(), or an arrow::DataType. Note that
	in nanoarrow, an arrow::schema() and a non-nullable arrow::struct()
	are represented identically."></head><body>
	<a href="#main" class="visually-hidden-focusable">Skip to contents</a>


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	</div>
	</nav><div class="container template-reference-topic">
	<div class="row">
	<main id="main" class="col-md-9"><div class="page-header">

	<h1>Convert an object to a nanoarrow schema</h1>
	<small class="dont-index">Source: <a href="https://github.com/apache/arrow-nanoarrow/blob/main/r/R/schema.R" class="external-link"><code>R/schema.R</code></a></small>
	<div class="d-none name"><code>as_nanoarrow_schema.Rd</code></div>
	</div>

	<div class="ref-description section level2">
	<p>In nanoarrow a 'schema' refers to a <code>struct ArrowSchema</code> as defined in the
	Arrow C Data interface. This data structure can be used to represent an
	<code><a href="https://arrow.apache.org/docs/r/reference/schema.html" class="external-link">arrow::schema()</a></code>, an <code><a href="https://arrow.apache.org/docs/r/reference/Field-class.html" class="external-link">arrow::field()</a></code>, or an <code><a href="https://arrow.apache.org/docs/r/reference/DataType-class.html" class="external-link">arrow::DataType</a></code>. Note that
	in nanoarrow, an <code><a href="https://arrow.apache.org/docs/r/reference/schema.html" class="external-link">arrow::schema()</a></code> and a non-nullable <code><a href="https://arrow.apache.org/docs/r/reference/data-type.html" class="external-link">arrow::struct()</a></code>
	are represented identically.</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">as_nanoarrow_schema</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
	<span></span>
	<span><span class="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span><span class="op">)</span></span>
	<span></span>
	<span><span class="fu">nanoarrow_schema_parse</span><span class="op">(</span><span class="va">x</span>, recursive <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></span>
	<span></span>
	<span><span class="fu">nanoarrow_schema_modify</span><span class="op">(</span><span class="va">x</span>, <span class="va">new_values</span>, validate <span class="op">=</span> <span class="cn">TRUE</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-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
	<dd><p>An object to convert to a schema</p></dd>


	<dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
	<dd><p>Passed to S3 methods</p></dd>


	<dt id="arg-recursive">recursive<a class="anchor" aria-label="anchor" href="#arg-recursive"></a></dt>
	<dd><p>Use <code>TRUE</code> to include a <code>children</code> member when parsing
	schemas.</p></dd>


	<dt id="arg-new-values">new_values<a class="anchor" aria-label="anchor" href="#arg-new-values"></a></dt>
	<dd><p>New schema component to assign</p></dd>


	<dt id="arg-validate">validate<a class="anchor" aria-label="anchor" href="#arg-validate"></a></dt>
	<dd><p>Use <code>FALSE</code> to skip schema validation</p></dd>

	</dl></div>
	<div class="section level2">
	<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
	<p>An object of class 'nanoarrow_schema'</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="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/integer.html" class="external-link">integer</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span></span></span>
	<span class="r-out co"><span class="r-pr">#></span> <nanoarrow_schema int32></span>
	<span class="r-out co"><span class="r-pr">#></span> $ format : chr "i"</span>
	<span class="r-out co"><span class="r-pr">#></span> $ name : chr ""</span>
	<span class="r-out co"><span class="r-pr">#></span> $ metadata : list()</span>
	<span class="r-out co"><span class="r-pr">#></span> $ flags : int 2</span>
	<span class="r-out co"><span class="r-pr">#></span> $ children : list()</span>
	<span class="r-out co"><span class="r-pr">#></span> $ dictionary: NULL</span>
	<span class="r-in"><span><span class="fu">infer_nanoarrow_schema</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>x <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/integer.html" class="external-link">integer</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
	<span class="r-out co"><span class="r-pr">#></span> <nanoarrow_schema struct></span>
	<span class="r-out co"><span class="r-pr">#></span> $ format : chr "+s"</span>
	<span class="r-out co"><span class="r-pr">#></span> $ name : chr ""</span>
	<span class="r-out co"><span class="r-pr">#></span> $ metadata : list()</span>
	<span class="r-out co"><span class="r-pr">#></span> $ flags : int 0</span>
	<span class="r-out co"><span class="r-pr">#></span> $ children :List of 1</span>
	<span class="r-out co"><span class="r-pr">#></span> ..$ x:<nanoarrow_schema int32></span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ format : chr "i"</span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ name : chr "x"</span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ metadata : list()</span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ flags : int 2</span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ children : list()</span>
	<span class="r-out co"><span class="r-pr">#></span> .. ..$ dictionary: NULL</span>
	<span class="r-out co"><span class="r-pr">#></span> $ dictionary: NULL</span>
	<span class="r-in"><span></span></span>
	</code></pre></div>
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