<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>DB_MULTIPLE_KEY_NEXT</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C API Reference" /> <link rel="up" href="dbt.html" title="Chapter 4. The DBT Handle" /> <link rel="prev" href="DB_MULTIPLE_NEXT.html" title="DB_MULTIPLE_NEXT" /> <link rel="next" href="DB_MULTIPLE_RECNO_NEXT.html" title="DB_MULTIPLE_RECNO_NEXT" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DB_MULTIPLE_KEY_NEXT</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="DB_MULTIPLE_NEXT.html">Prev</a> </td> <th width="60%" align="center">Chapter 4. The DBT Handle </th> <td width="20%" align="right"> <a accesskey="n" href="DB_MULTIPLE_RECNO_NEXT.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="DB_MULTIPLE_KEY_NEXT"></a>DB_MULTIPLE_KEY_NEXT</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> DB_MULTIPLE_KEY_NEXT(void *pointer, DBT *data, void *retkey, size_t retklen, void *retdata, size_t retdlen); </pre> <p> If either of the <a class="link" href="dbcget.html#dbcget_DB_MULTIPLE">DB_MULTIPLE</a> or <a class="link" href="dbcget.html#dbcget_DB_MULTIPLE_KEY">DB_MULTIPLE_KEY</a> flags were specified to the <a class="xref" href="dbget.html" title="DB->get()">DB->get()</a> or <a class="xref" href="dbcget.html" title="DBcursor->get()">DBcursor->get()</a> methods, the data <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> returned by those interfaces will refer to a buffer that is filled with data. Access to that data is through the DB_MULTIPLE_* macros. </p> <p> Returns the next <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> in the bulk retrieval set. Use this macro with <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> structures obtained from a database that uses the Btree or Hash access methods. </p> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1658481"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658572"></a>pointer</h4> </div> </div> </div> <p> The <span class="bold"><strong>pointer</strong></span> parameter is a variable that must have been initialized by a call to <a class="xref" href="DB_MULTIPLE_INIT.html" title="DB_MULTIPLE_INIT">DB_MULTIPLE_INIT</a>. </p> <p> This parameter is set to NULL if there are no more key/data pairs in the returned set. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658364"></a>data</h4> </div> </div> </div> <p> The <span class="bold"><strong>data</strong></span> parameter is a <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> structure returned from a successful call to <a class="xref" href="dbcget.html" title="DBcursor->get()">DBcursor->get()</a> with the Btree or Hash access methods for which the <a class="link" href="dbcget.html#dbcget_DB_MULTIPLE_KEY">DB_MULTIPLE_KEY</a> flag was specified. </p> <p> The <span class="bold"><strong>data</strong></span> parameter must have been initialized by a call to <a class="xref" href="DB_MULTIPLE_INIT.html" title="DB_MULTIPLE_INIT">DB_MULTIPLE_INIT</a>. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658669"></a>retkey</h4> </div> </div> </div> <p> The <span class="bold"><strong>retkey</strong></span> parameter is set to the next key element in the returned set. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658618"></a>retklen</h4> </div> </div> </div> <p> The <span class="bold"><strong>retklen</strong></span> parameter is set to the length, in bytes, of the next key element. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658774"></a>retdata</h4> </div> </div> </div> <p> The <span class="bold"><strong>retdata</strong></span> parameter is set to the next data element in the returned set. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id1658788"></a>retdlen</h4> </div> </div> </div> <p> The <span class="bold"><strong>retdlen</strong></span> parameter is set to the length, in bytes, of the next data element. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1658803"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="dbt.html" title="Chapter 4. The DBT Handle">DBT</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="id1658684"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="dbt.html#dbtlist" title="DBT and Bulk Operations">DBT and Bulk Operations</a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="DB_MULTIPLE_NEXT.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="dbt.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="DB_MULTIPLE_RECNO_NEXT.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB_MULTIPLE_NEXT </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> DB_MULTIPLE_RECNO_NEXT</td> </tr> </table> </div> </body> </html>