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<p>Library Version 11.2.5.3</p>
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<td width="20%" align="left"><a accesskey="p" href="stldbstl_global_functionsregister_db_env.html">Prev</a> </td>
<th width="60%" align="center">Chapter 1.
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<h2 class="title" style="clear: both"><a id="stldbstl_global_functionsopen_db"></a>open_db</h2>
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<pre class="programlisting">
Db* open_db(DbEnv *penv, const char *filename, DBTYPE dbtype,
u_int32_t oflags, u_int32_t set_flags, int mode=0644, DbTxn *txn=NULL,
u_int32_t cflags=0,
const char *dbname=NULL)
</pre>
<p>Helper function to open a database and register it into dbstl for the calling thread. </p>
<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>
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>
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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<h4 class="title"><a id="idp49946664"></a>Parameters</h4>
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<h5 class="title"><a id="idp49946856"></a>penv</h5>
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<p>The environment to open the database from. </p>
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<h5 class="title"><a id="idp49949128"></a>txn</h5>
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<p>The transaction to open the database from, passed to Db::open. </p>
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<h5 class="title"><a id="idp49949520"></a>dbtype</h5>
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<p>The database type, passed to Db::open. </p>
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<h5 class="title"><a id="idp49949840"></a>oflags</h5>
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<p>The database open flags, passed to Db::open. </p>
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<h5 class="title"><a id="idp49950160"></a>filename</h5>
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<p>The database file name, passed to Db::open. </p>
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<h5 class="title"><a id="idp49950536"></a>mode</h5>
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<p>The database open mode, passed to Db::open. </p>
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<h5 class="title"><a id="idp49950912"></a>cflags</h5>
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<p>The create flags passed to Db class constructor. </p>
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<h5 class="title"><a id="idp49951288"></a>dbname</h5>
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<p>The database name, passed to Db::open. </p>
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<h5 class="title"><a id="idp49951664"></a>set_flags</h5>
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<p>The flags to be set to the created database handle. </p>
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<h4 class="title"><a id="idp49944128"></a>Return Value</h4>
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<p>The opened database handle. </p>
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<h4 class="title"><a id="idp49952048"></a>See Also</h4>
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<p>
</p>
<p><a class="link" href="stldbstl_global_functionsregister_db.html" title="register_db">register_db(Db *)</a>
; </p>
<p>
</p>
<p>open_db_env; </p>
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<h3 class="title"><a id="idp49928856"></a>Class</h3>
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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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