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219 lines
8.3 KiB
HTML
219 lines
8.3 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>open_db</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" />
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<link rel="up" href="dbstl_global_functions.html" title="Chapter 1. Dbstl Global Public Functions" />
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<link rel="prev" href="stldbstl_global_functionsregister_db_env.html" title="register_db_env" />
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<link rel="next" href="stldbstl_global_functionsopen_env.html" title="open_env" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">open_db</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="stldbstl_global_functionsregister_db_env.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 1.
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Dbstl Global Public Functions </th>
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<td width="20%" align="right"> <a accesskey="n" href="stldbstl_global_functionsopen_env.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" 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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<h2 class="title" style="clear: both"><a id="stldbstl_global_functionsopen_db"></a>open_db</h2>
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</div>
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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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<h3 class="title"><a id="stldbstl_global_functionsopen_db_details"></a>Function Details</h3>
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</div>
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</div>
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</div>
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<pre class="programlisting">
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Db* open_db(DbEnv *penv, const char *filename, DBTYPE dbtype,
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u_int32_t oflags, u_int32_t set_flags, int mode=0644, DbTxn *txn=NULL,
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u_int32_t cflags=0,
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const char *dbname=NULL)
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</pre>
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<p>Helper function to open a database and register it into dbstl for the calling thread. </p>
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<p>Users still need to register it in any other thread using it if it is shared by multiple threads, via <a class="link" href="stldbstl_global_functionsregister_db.html" title="register_db">register_db()</a>
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function. Users don't need to delete or free the memory of the returned object, dbstl will take care of that. When you don't use <a class="link" href="stldbstl_global_functionsopen_db.html" title="open_db">dbstl::open_db()</a>
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but explicitly call DB C++ API to open a database, you must new the Db object, rather than create it on stack, and you must delete the Db object by yourself. </p>
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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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<h4 class="title"><a id="id3513494"></a>Parameters</h4>
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</div>
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</div>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513497"></a>penv</h5>
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</div>
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</div>
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</div>
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<p>The environment to open the database from. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513536"></a>txn</h5>
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</div>
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</div>
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</div>
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<p>The transaction to open the database from, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513543"></a>dbtype</h5>
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</div>
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</div>
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</div>
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<p>The database type, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513548"></a>oflags</h5>
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</div>
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</div>
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</div>
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<p>The database open flags, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513554"></a>filename</h5>
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</div>
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</div>
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</div>
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<p>The database file name, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513561"></a>mode</h5>
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</div>
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</div>
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</div>
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<p>The database open mode, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513567"></a>cflags</h5>
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</div>
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</div>
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</div>
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<p>The create flags passed to Db class constructor. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513573"></a>dbname</h5>
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</div>
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</div>
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</div>
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<p>The database name, passed to Db::open. </p>
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</div>
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<div class="sect4" 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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<h5 class="title"><a id="id3513578"></a>set_flags</h5>
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</div>
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</div>
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</div>
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<p>The flags to be set to the created database handle. </p>
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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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<h4 class="title"><a id="id3513457"></a>Return Value</h4>
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</div>
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</div>
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</div>
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<p>The opened database handle. </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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<h4 class="title"><a id="id3513447"></a>See Also</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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</p>
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<p><a class="link" href="stldbstl_global_functionsregister_db.html" title="register_db">register_db(Db *)</a>
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; </p>
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<p>
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</p>
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<p>open_db_env; </p>
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<p>
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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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<h3 class="title"><a id="id3513342"></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="dbstl_global_functions.html" title="Chapter 1. Dbstl Global Public Functions">dbstl_global_functions</a>
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="stldbstl_global_functionsregister_db_env.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="dbstl_global_functions.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="stldbstl_global_functionsopen_env.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">register_db_env </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> open_env</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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