<?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>begin_txn</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++ Standard Template Library API Reference" /> <link rel="up" href="dbstl_global_functions.html" title="Chapter 1. Dbstl Global Public Functions" /> <link rel="prev" href="stldbstl_global_functionsclose_all_db_envs.html" title="close_all_db_envs" /> <link rel="next" href="stldbstl_global_functionscommit_txn.html" title="commit_txn" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">begin_txn</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="stldbstl_global_functionsclose_all_db_envs.html">Prev</a> </td> <th width="60%" align="center">Chapter 1. Dbstl Global Public Functions </th> <td width="20%" align="right"> <a accesskey="n" href="stldbstl_global_functionscommit_txn.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="stldbstl_global_functionsbegin_txn"></a>begin_txn</h2> </div> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="stldbstl_global_functionsbegin_txn_details"></a>Function Details</h3> </div> </div> </div> <pre class="programlisting"> DbTxn* begin_txn(u_int32_t flags, DbEnv *env) </pre> <p>Begin a new transaction from the specified environment "env". </p> <p>This function is called by dbstl user to begin an external transaction. The "flags" parameter is passed to DbEnv::txn_begin(). If a transaction created from the same database environment already exists and is unresolved, the new transaction is started as a child transaction of that transaction, and thus you can't specify the parent transaction. </p> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp49902336"></a>Parameters</h4> </div> </div> </div> <div class="sect4" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h5 class="title"><a id="idp49910720"></a>flags</h5> </div> </div> </div> <p>It is set to DbEnv::txn_begin() function. </p> </div> <div class="sect4" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h5 class="title"><a id="idp49912600"></a>env</h5> </div> </div> </div> <p>The environment to start a transaction from. </p> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp49909688"></a>Return Value</h4> </div> </div> </div> <p>The newly created transaction. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp49908608"></a>Group: Transaction control global functions.</h3> </div> </div> </div> <p>dbstl transaction API.</p> <p>You should call these API rather than DB C/C++ API to use Berkeley DB transaction features. </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp49907560"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="dbstl_global_functions.html" title="Chapter 1. Dbstl Global Public Functions">dbstl_global_functions</a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="stldbstl_global_functionsclose_all_db_envs.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="dbstl_global_functions.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="stldbstl_global_functionscommit_txn.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">close_all_db_envs </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> commit_txn</td> </tr> </table> </div> </body> </html>