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<h1>22. Virtuoso Functions Guide - composite_ref</h1>
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<h2>composite_ref</h2>
<div class="refpurpose">get member of a composite object</div>
<div class="funcsynopsis">
<span class="funcdef">integer <span class="function">composite_ref</span>
</span>
(<span class="paramdef">in <span class="parameter">c</span> any</span>,
<span class="paramdef">in <span class="parameter">nth</span> integer</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>
<span class="computeroutput">composite_ref</span> returns the <span class="computeroutput">nth</span>
element of the composite. The index is 0 based.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">
<span class="refsect2title">nth – </span>
<span class="computeroutput">integer</span>
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Return types</div>
<p>The type returned is the type of the composite member referred to.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Errors</div>
<table class="data">
<tr>
<td class="data">
<a name="err22023" />
<span class="errorcode">22023</span>
</td>
<td class="data">
<a name="errFT002" />
<span class="errorcode">FT002</span>
</td>
<td class="data">
<span class="errorname">composite expected for composite ref</span>
</td>
<td class="data" />
</tr>
<tr>
<td class="data">
<a name="err22003" />
<span class="errorcode">22003</span>
</td>
<td class="data">
<a name="errFT003" />
<span class="errorcode">FT003</span>
</td>
<td class="data">
<span class="errorname">composite index out of range %d for length %d</span>
</td>
<td class="data" />
</tr>
</table>
<br />
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_composite_ref_1" />
<div class="example">
<div class="exampletitle">Simple example</div>
<p>Get first member of a composite consisting of <span class="computeroutput">VARCHAR</span> values.</p>
<div>
<pre class="screen">SQL> select composite_ref (composite ('Miles','Herbie','Wayne','Ron','Tony'), 0);
callret
VARCHAR
_______________________________________________________________________________
Miles
1 Rows. -- 4 msec.
</pre>
</div>
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<div class="refsect1">
<div class="refsect1title">See Also</div>
<p>The <a href="creatingtxtidxs.html#compositedatatype">Composite Data Type</a>
for a definition of the properties of composite objects.</p>
<p>The function
<a href="fn_composite.html">composite</a>.</p>
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