2011-09-13 17:44:24 +00:00
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<title>DB_MULTIPLE_KEY_NEXT</title>
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<p>Library Version 11.2.5.2</p>
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<table width="100%" summary="Navigation header">
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<th colspan="3" align="center">DB_MULTIPLE_KEY_NEXT</th>
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<td width="20%" align="left"><a accesskey="p" href="DB_MULTIPLE_NEXT.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 4.
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The DBT Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="DB_MULTIPLE_RECNO_NEXT.html">Next</a></td>
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<div>
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<h2 class="title" style="clear: both"><a id="DB_MULTIPLE_KEY_NEXT"></a>DB_MULTIPLE_KEY_NEXT</h2>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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DB_MULTIPLE_KEY_NEXT(void *pointer, DBT *data,
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void *retkey, size_t retklen, void *retdata, size_t retdlen); </pre>
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<p>
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If either of the
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<a class="link" href="dbcget.html#dbcget_DB_MULTIPLE">DB_MULTIPLE</a>
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or
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<a class="link" href="dbcget.html#dbcget_DB_MULTIPLE_KEY">DB_MULTIPLE_KEY</a>
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flags were specified to the <a class="xref" href="dbget.html" title="DB->get()">DB->get()</a> or
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<a class="xref" href="dbcget.html" title="DBcursor->get()">DBcursor->get()</a> methods, the data
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<a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> returned by those interfaces will
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refer to a buffer that is filled with data. Access to that data is through the
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DB_MULTIPLE_* macros.
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</p>
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<p>
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Returns the next <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> in the bulk
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retrieval set. Use this macro with <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a>
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structures obtained from a database that uses the Btree or Hash
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access methods.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3701633"></a>Parameters</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3701636"></a>pointer</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>pointer</strong></span> parameter is a variable
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that must have been initialized by a call to
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<a class="xref" href="DB_MULTIPLE_INIT.html" title="DB_MULTIPLE_INIT">DB_MULTIPLE_INIT</a>.
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</p>
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<p>
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This parameter is set to NULL if there are no more key/data pairs in
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the returned set.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3700338"></a>data</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>data</strong></span> parameter is a
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<a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> structure returned from a
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successful call to <a class="xref" href="dbcget.html" title="DBcursor->get()">DBcursor->get()</a> with the Btree or Hash
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access methods for which the
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<a class="link" href="dbcget.html#dbcget_DB_MULTIPLE_KEY">DB_MULTIPLE_KEY</a>
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flag was specified.
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</p>
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<p>
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The <span class="bold"><strong>data</strong></span> parameter must have been initialized by
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a call to <a class="xref" href="DB_MULTIPLE_INIT.html" title="DB_MULTIPLE_INIT">DB_MULTIPLE_INIT</a>.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3701347"></a>retkey</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>retkey</strong></span> parameter is set
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to the next key element in the returned set.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3701465"></a>retklen</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>retklen</strong></span> parameter is set to
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the length, in bytes, of the next key element.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3701652"></a>retdata</h4>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>retdata</strong></span> parameter is set
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to the next data element in the returned set.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h4 class="title"><a id="id3701670"></a>retdlen</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>retdlen</strong></span> parameter is set to
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the length, in bytes, of the next data element.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3701688"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3701711"></a>See Also</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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<p>
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<a class="xref" href="dbt.html#dbtlist" title="DBT and Bulk Operations">DBT and Bulk Operations</a>
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</p>
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