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<?xml version="1.0"?>
<page xmlns="http://projectmallard.org/1.0/"
type="topic"
style="function"
xmlns:api="http://projectmallard.org/experimental/api/"
xmlns:ui="http://projectmallard.org/experimental/ui/"
id="mongoc_client_command_simple">
<info>
<link type="guide" xref="mongoc_client_t" group="function"/>
</info>
<title>mongoc_client_command_simple()</title>
<section id="synopsis">
<title>Synopsis</title>
<synopsis><code mime="text/x-csrc"><![CDATA[bool
mongoc_client_command_simple (mongoc_client_t *client,
const char *db_name,
const bson_t *command,
const mongoc_read_prefs_t *read_prefs,
bson_t *reply,
bson_error_t *error);
]]></code></synopsis>
<p>This is a simplified interface to <code xref="mongoc_client_command">mongoc_client_command()</code>. It returns the first document from the result cursor into <code>reply</code>.</p>
<note style="warning"><p><code>reply</code> is always set, and should be released with <code xref="bson:bson_destroy">bson_destroy()</code>.</p></note>
</section>
<section id="parameters">
<title>Parameters</title>
<table>
<tr><td><p>client</p></td><td><p>A <code xref="mongoc_client_t">mongoc_client_t</code>.</p></td></tr>
<tr><td><p>db_name</p></td><td><p>The name of the database to run the command on.</p></td></tr>
<tr><td><p>command</p></td><td><p>A <code xref="bson:bson_t">bson_t</code> containing the command specification.</p></td></tr>
<tr><td><p>read_prefs</p></td><td><p>An optional <code xref="mongoc_read_prefs_t">mongoc_read_prefs_t</code>. Otherwise, the command uses mode <code>MONGOC_READ_PRIMARY</code>.</p></td></tr>
<tr><td><p>reply</p></td><td><p>A location for the resulting document.</p></td></tr>
<tr><td><p>error</p></td><td><p>An optional location for a <code xref="errors">bson_error_t</code> or <code>NULL</code>.</p></td></tr>
</table>
</section>
<section id="errors">
<title>Errors</title>
<p>Errors are propagated via the <code>error</code> parameter.</p>
</section>
<section id="return">
<title>Returns</title>
<p><code>true</code> if successful; otherwise <code>false</code> and <code>error</code> is set.</p>
</section>
</page>
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