87 lines
3.6 KiB
HTML
87 lines
3.6 KiB
HTML
<!--$Id: env_set_tx_timestamp.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
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<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
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<!--See the file LICENSE for redistribution information.-->
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<html>
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<head>
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<title>Berkeley DB: DB_ENV->set_tx_timestamp</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
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</head>
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<body bgcolor=white>
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<table width="100%"><tr valign=top>
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<td>
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<b>DB_ENV->set_tx_timestamp</b>
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</td>
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<td align=right>
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<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a>
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<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
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</tr></table>
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<hr size=1 noshade>
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<tt>
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<b><pre>
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#include <db.h>
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<p>
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int
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DB_ENV->set_tx_timestamp(DB_ENV *dbenv, time_t *timestamp);
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<p>
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int
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DB_ENV->get_tx_timestamp(DB_ENV *dbenv, time_t *timestampp);
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DB_ENV->set_tx_timestamp</b>
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<p>Recover to the time specified by <b>timestamp</b> rather than to the
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most current possible date.</p>
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<p>Once a database environment has been upgraded to a new version of Berkeley DB
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involving a log format change (see <a href="../ref/upgrade/process.html">Upgrading Berkeley DB installations</a>), it is no longer possible to recover
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to a specific time before that upgrade.</p>
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<p>The DB_ENV->set_tx_timestamp method configures operations performed using the specified
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<a href="../api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying
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database environment.</p>
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<p>The DB_ENV->set_tx_timestamp method may not be called after the <a href="../api_c/env_open.html">DB_ENV->open</a> method is
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called.
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</p>
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<p>The DB_ENV->set_tx_timestamp method
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returns a non-zero error value on failure
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and 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>timestamp</b><ul compact><li>The <b>timestamp</b> parameter references the memory location where the
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recovery timestamp is located.
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<p>The <b>timestamp</b> parameter should be the number of seconds since 0
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hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal
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Time; that is, the Epoch.</p></ul>
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<br>
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<br><b>Errors</b>
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<p>The DB_ENV->set_tx_timestamp method
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may fail and return one of the following non-zero errors:</p>
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<br>
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<b>EINVAL</b><ul compact><li>If it is not possible to recover to the specified time using the log files
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currently present in the environment; or if an
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invalid flag value or parameter was specified.</ul>
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<br>
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<hr size=1 noshade>
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<b>Description: DB_ENV->get_tx_timestamp</b>
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<p>The DB_ENV->get_tx_timestamp method returns the recovery timestamp.</p>
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<p>The DB_ENV->get_tx_timestamp method may be called at any time during the life of the
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application.</p>
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<p>The DB_ENV->get_tx_timestamp method
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returns a non-zero error value on failure
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and 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>timestampp</b><ul compact><li>The DB_ENV->get_tx_timestamp method returns the
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recovery timestamp in <b>timestampp</b>.</ul>
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<br>
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<hr size=1 noshade>
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<br><b>Class</b>
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<a href="../api_c/env_class.html">DB_ENV</a>, <a href="../api_c/txn_class.html">DB_TXN</a>
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<br><b>See Also</b>
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<a href="../api_c/txn_list.html">Transaction Subsystem and Related Methods</a>
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</tt>
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<table width="100%"><tr><td><br></td><td align=right>
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<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
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</body>
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</html>
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