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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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<div class="title">WiredTiger Extension API</div> </div>
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<p>The functions and interfaces applications use to customize and extend the behavior of WiredTiger.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___c_o_l_l_a_t_o_r.html">WT_COLLATOR</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The interface implemented by applications to provide custom ordering of records. <a href="struct_w_t___c_o_l_l_a_t_o_r.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___c_o_m_p_r_e_s_s_o_r.html">WT_COMPRESSOR</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The interface implemented by applications to provide custom compression. <a href="struct_w_t___c_o_m_p_r_e_s_s_o_r.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___d_a_t_a___s_o_u_r_c_e.html">WT_DATA_SOURCE</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Applications can extend WiredTiger by providing new implementations of the <a class="el" href="struct_w_t___d_a_t_a___s_o_u_r_c_e.html" title="Applications can extend WiredTiger by providing new implementations of the WT_DATA_SOURCE class...">WT_DATA_SOURCE</a> class. <a href="struct_w_t___d_a_t_a___s_o_u_r_c_e.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___e_n_c_r_y_p_t_o_r.html">WT_ENCRYPTOR</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The interface implemented by applications to provide custom encryption. <a href="struct_w_t___e_n_c_r_y_p_t_o_r.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___e_x_t_r_a_c_t_o_r.html">WT_EXTRACTOR</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The interface implemented by applications to provide custom extraction of index keys or column group values. <a href="struct_w_t___e_x_t_r_a_c_t_o_r.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___f_i_l_e___s_y_s_t_e_m.html">WT_FILE_SYSTEM</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The interface implemented by applications to provide a custom file system implementation. <a href="struct_w_t___f_i_l_e___s_y_s_t_e_m.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___f_i_l_e___h_a_n_d_l_e.html">WT_FILE_HANDLE</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">A file handle implementation returned by WT_FILE_SYSTEM::open_file. <a href="struct_w_t___f_i_l_e___h_a_n_d_l_e.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___t_x_n___n_o_t_i_f_y.html">WT_TXN_NOTIFY</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Snapshot isolation level, returned by <a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#a5a3766f959083f362e3668c40ac995c5" title="Return the current transaction's isolation level; returns one of WT_TXN_ISO_READ_COMMITTED, WT_TXN_ISO_READ_UNCOMMITTED, or WT_TXN_ISO_SNAPSHOT. ">WT_EXTENSION_API::transaction_isolation_level</a>. <a href="struct_w_t___t_x_n___n_o_t_i_f_y.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html">WT_EXTENSION_API</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Table of WiredTiger extension methods. <a href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:gab975daa8226fa0fe422176afc3677ab0"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="gab975daa8226fa0fe422176afc3677ab0"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#gab975daa8226fa0fe422176afc3677ab0">WT_FS_OPEN_ACCESS_RAND</a></td></tr>
<tr class="memdesc:gab975daa8226fa0fe422176afc3677ab0"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: random access pattern. <br /></td></tr>
<tr class="separator:gab975daa8226fa0fe422176afc3677ab0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga19767a9a6283ce3c69a6d92be86d0c56"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga19767a9a6283ce3c69a6d92be86d0c56"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga19767a9a6283ce3c69a6d92be86d0c56">WT_FS_OPEN_ACCESS_SEQ</a></td></tr>
<tr class="memdesc:ga19767a9a6283ce3c69a6d92be86d0c56"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: sequential access pattern. <br /></td></tr>
<tr class="separator:ga19767a9a6283ce3c69a6d92be86d0c56"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf336409aa954d371159b0e9d78785179"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="gaf336409aa954d371159b0e9d78785179"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#gaf336409aa954d371159b0e9d78785179">WT_FS_OPEN_CREATE</a></td></tr>
<tr class="memdesc:gaf336409aa954d371159b0e9d78785179"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: create if does not exist. <br /></td></tr>
<tr class="separator:gaf336409aa954d371159b0e9d78785179"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga33e13fa2f6113176ff3ea355c96749a3"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga33e13fa2f6113176ff3ea355c96749a3"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga33e13fa2f6113176ff3ea355c96749a3">WT_FS_OPEN_DIRECTIO</a></td></tr>
<tr class="memdesc:ga33e13fa2f6113176ff3ea355c96749a3"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: direct I/O requested. <br /></td></tr>
<tr class="separator:ga33e13fa2f6113176ff3ea355c96749a3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga6ff865a494747bc27525b6b9e1a61ae6"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga6ff865a494747bc27525b6b9e1a61ae6"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga6ff865a494747bc27525b6b9e1a61ae6">WT_FS_OPEN_DURABLE</a></td></tr>
<tr class="memdesc:ga6ff865a494747bc27525b6b9e1a61ae6"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: file creation must be durable. <br /></td></tr>
<tr class="separator:ga6ff865a494747bc27525b6b9e1a61ae6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gab29effbad63261153d59ad01fcaf7d25"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="gab29effbad63261153d59ad01fcaf7d25"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#gab29effbad63261153d59ad01fcaf7d25">WT_FS_OPEN_EXCLUSIVE</a></td></tr>
<tr class="memdesc:gab29effbad63261153d59ad01fcaf7d25"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: return EBUSY if exclusive use not available. <br /></td></tr>
<tr class="separator:gab29effbad63261153d59ad01fcaf7d25"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga91e49502eb5f12a2e4c12a78d93bf4bd"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga91e49502eb5f12a2e4c12a78d93bf4bd"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga91e49502eb5f12a2e4c12a78d93bf4bd">WT_FS_OPEN_READONLY</a></td></tr>
<tr class="memdesc:ga91e49502eb5f12a2e4c12a78d93bf4bd"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file flags: open is read-only. <br /></td></tr>
<tr class="separator:ga91e49502eb5f12a2e4c12a78d93bf4bd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga93dc8e06b256a13bc46cd04b71b92d45"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga93dc8e06b256a13bc46cd04b71b92d45"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga93dc8e06b256a13bc46cd04b71b92d45">WT_FS_DURABLE</a></td></tr>
<tr class="memdesc:ga93dc8e06b256a13bc46cd04b71b92d45"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::remove or WT_FILE_SYSTEM::rename flags: the remove or rename operation must be durable. <br /></td></tr>
<tr class="separator:ga93dc8e06b256a13bc46cd04b71b92d45"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga6d6c6913fd2d03910419f8e20f0026a4"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga6d6c6913fd2d03910419f8e20f0026a4"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga6d6c6913fd2d03910419f8e20f0026a4">WT_FILE_HANDLE_DONTNEED</a></td></tr>
<tr class="memdesc:ga6d6c6913fd2d03910419f8e20f0026a4"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_HANDLE::fadvise flags: no longer need. <br /></td></tr>
<tr class="separator:ga6d6c6913fd2d03910419f8e20f0026a4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa4979ed3f2610368e392be059390b62f"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="gaa4979ed3f2610368e392be059390b62f"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#gaa4979ed3f2610368e392be059390b62f">WT_FILE_HANDLE_WILLNEED</a></td></tr>
<tr class="memdesc:gaa4979ed3f2610368e392be059390b62f"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_HANDLE::fadvise flags: will need. <br /></td></tr>
<tr class="separator:gaa4979ed3f2610368e392be059390b62f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga84ae45d6803da8dab05bb72c2e69aa0f"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga84ae45d6803da8dab05bb72c2e69aa0f"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga84ae45d6803da8dab05bb72c2e69aa0f">WT_TXN_ISO_READ_COMMITTED</a></td></tr>
<tr class="memdesc:ga84ae45d6803da8dab05bb72c2e69aa0f"><td class="mdescLeft"> </td><td class="mdescRight">Read-committed isolation level, returned by <a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#a5a3766f959083f362e3668c40ac995c5" title="Return the current transaction's isolation level; returns one of WT_TXN_ISO_READ_COMMITTED, WT_TXN_ISO_READ_UNCOMMITTED, or WT_TXN_ISO_SNAPSHOT. ">WT_EXTENSION_API::transaction_isolation_level</a>. <br /></td></tr>
<tr class="separator:ga84ae45d6803da8dab05bb72c2e69aa0f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga604e4478bcef2026786b0826e34f5262"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga604e4478bcef2026786b0826e34f5262"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga604e4478bcef2026786b0826e34f5262">WT_TXN_ISO_READ_UNCOMMITTED</a></td></tr>
<tr class="memdesc:ga604e4478bcef2026786b0826e34f5262"><td class="mdescLeft"> </td><td class="mdescRight">Read-uncommitted isolation level, returned by <a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#a5a3766f959083f362e3668c40ac995c5" title="Return the current transaction's isolation level; returns one of WT_TXN_ISO_READ_COMMITTED, WT_TXN_ISO_READ_UNCOMMITTED, or WT_TXN_ISO_SNAPSHOT. ">WT_EXTENSION_API::transaction_isolation_level</a>. <br /></td></tr>
<tr class="separator:ga604e4478bcef2026786b0826e34f5262"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga36207e3a80d960f7e0c822e8ab483014"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga36207e3a80d960f7e0c822e8ab483014"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga36207e3a80d960f7e0c822e8ab483014">WT_TXN_ISO_SNAPSHOT</a></td></tr>
<tr class="memdesc:ga36207e3a80d960f7e0c822e8ab483014"><td class="mdescLeft"> </td><td class="mdescRight">Snapshot isolation level, returned by <a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#a5a3766f959083f362e3668c40ac995c5" title="Return the current transaction's isolation level; returns one of WT_TXN_ISO_READ_COMMITTED, WT_TXN_ISO_READ_UNCOMMITTED, or WT_TXN_ISO_SNAPSHOT. ">WT_EXTENSION_API::transaction_isolation_level</a>. <br /></td></tr>
<tr class="separator:ga36207e3a80d960f7e0c822e8ab483014"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:ga6fa5797cf581d18dc843e07333a497e4"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="group__wt__ext.html#ga6fa5797cf581d18dc843e07333a497e4">WT_CONFIG_ARG</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga6fa5797cf581d18dc843e07333a497e4">WT_CONFIG_ARG</a></td></tr>
<tr class="memdesc:ga6fa5797cf581d18dc843e07333a497e4"><td class="mdescLeft"> </td><td class="mdescRight">A configuration object passed to some extension interfaces. <a href="#ga6fa5797cf581d18dc843e07333a497e4">More...</a><br /></td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:gae93ff9285c3e44f34ffd98ed54ff69c8"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#gae93ff9285c3e44f34ffd98ed54ff69c8">WT_FS_OPEN_FILE_TYPE</a> { <br />
  <a class="el" href="group__wt__ext.html#ggae93ff9285c3e44f34ffd98ed54ff69c8a3f41d49a49653119001275d7c947842c">WT_FS_OPEN_FILE_TYPE_CHECKPOINT</a>,
<a class="el" href="group__wt__ext.html#ggae93ff9285c3e44f34ffd98ed54ff69c8a4fe90c9b0fcbad204786b8ca088da035">WT_FS_OPEN_FILE_TYPE_DATA</a>,
<a class="el" href="group__wt__ext.html#ggae93ff9285c3e44f34ffd98ed54ff69c8aefe46c7fefa38ef06a32a8357791f852">WT_FS_OPEN_FILE_TYPE_DIRECTORY</a>,
<a class="el" href="group__wt__ext.html#ggae93ff9285c3e44f34ffd98ed54ff69c8ab27f1980d26869872899d889d8753def">WT_FS_OPEN_FILE_TYPE_LOG</a>,
<br />
  <a class="el" href="group__wt__ext.html#ggae93ff9285c3e44f34ffd98ed54ff69c8ad96f702fb4cff2391a0b5601a5c2bb08">WT_FS_OPEN_FILE_TYPE_REGULAR</a>
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}<tr class="memdesc:gae93ff9285c3e44f34ffd98ed54ff69c8"><td class="mdescLeft"> </td><td class="mdescRight">WT_FILE_SYSTEM::open_file file types. <a href="group__wt__ext.html#gae93ff9285c3e44f34ffd98ed54ff69c8">More...</a><br /></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:ga5ed14c916d5dcfe0e81aea9d9ccb7fe3"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga5ed14c916d5dcfe0e81aea9d9ccb7fe3">wiredtiger_extension_init</a> (<a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html">WT_CONNECTION</a> *connection, <a class="el" href="group__wt__ext.html#ga6fa5797cf581d18dc843e07333a497e4">WT_CONFIG_ARG</a> *config)</td></tr>
<tr class="memdesc:ga5ed14c916d5dcfe0e81aea9d9ccb7fe3"><td class="mdescLeft"> </td><td class="mdescRight">Entry point to an extension, called when the extension is loaded. <a href="#ga5ed14c916d5dcfe0e81aea9d9ccb7fe3">More...</a><br /></td></tr>
<tr class="separator:ga5ed14c916d5dcfe0e81aea9d9ccb7fe3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga3b904ac0bedaa0d1d59d04baaf915f7f"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__wt__ext.html#ga3b904ac0bedaa0d1d59d04baaf915f7f">wiredtiger_extension_terminate</a> (<a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html">WT_CONNECTION</a> *connection)</td></tr>
<tr class="memdesc:ga3b904ac0bedaa0d1d59d04baaf915f7f"><td class="mdescLeft"> </td><td class="mdescRight">Optional cleanup function for an extension, called during <a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#af535c517df851eeac8ebf3594d40b545" title="Close a connection. ">WT_CONNECTION::close</a>. <a href="#ga3b904ac0bedaa0d1d59d04baaf915f7f">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>The functions and interfaces applications use to customize and extend the behavior of WiredTiger. </p>
<h2 class="groupheader">Typedef Documentation</h2>
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<td class="memname"><a class="el" href="group__wt__ext.html#ga6fa5797cf581d18dc843e07333a497e4">WT_CONFIG_ARG</a></td>
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<p>A configuration object passed to some extension interfaces. </p>
<p>This is an opaque type: configuration values can be queried using <a class="el" href="struct_w_t___e_x_t_e_n_s_i_o_n___a_p_i.html#a0d3aae2ceac28f7b45188bcfa4306d45" title="Return the value of a configuration key. ">WT_EXTENSION_API::config_get</a> </p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<td class="memname">enum <a class="el" href="group__wt__ext.html#gae93ff9285c3e44f34ffd98ed54ff69c8">WT_FS_OPEN_FILE_TYPE</a></td>
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<p>WT_FILE_SYSTEM::open_file file types. </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="ggae93ff9285c3e44f34ffd98ed54ff69c8a3f41d49a49653119001275d7c947842c"></a>WT_FS_OPEN_FILE_TYPE_CHECKPOINT </td><td class="fielddoc">
<p>open a data file checkpoint </p>
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<tr><td class="fieldname"><a class="anchor" id="ggae93ff9285c3e44f34ffd98ed54ff69c8a4fe90c9b0fcbad204786b8ca088da035"></a>WT_FS_OPEN_FILE_TYPE_DATA </td><td class="fielddoc">
<p>open a data file </p>
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<tr><td class="fieldname"><a class="anchor" id="ggae93ff9285c3e44f34ffd98ed54ff69c8aefe46c7fefa38ef06a32a8357791f852"></a>WT_FS_OPEN_FILE_TYPE_DIRECTORY </td><td class="fielddoc">
<p>open a directory </p>
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<tr><td class="fieldname"><a class="anchor" id="ggae93ff9285c3e44f34ffd98ed54ff69c8ab27f1980d26869872899d889d8753def"></a>WT_FS_OPEN_FILE_TYPE_LOG </td><td class="fielddoc">
<p>open a log file </p>
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<tr><td class="fieldname"><a class="anchor" id="ggae93ff9285c3e44f34ffd98ed54ff69c8ad96f702fb4cff2391a0b5601a5c2bb08"></a>WT_FS_OPEN_FILE_TYPE_REGULAR </td><td class="fielddoc">
<p>open a regular file </p>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">int wiredtiger_extension_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html">WT_CONNECTION</a> * </td>
<td class="paramname"><em>connection</em>, </td>
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<td class="paramtype"><a class="el" href="group__wt__ext.html#ga6fa5797cf581d18dc843e07333a497e4">WT_CONFIG_ARG</a> * </td>
<td class="paramname"><em>config</em> </td>
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<p>Entry point to an extension, called when the extension is loaded. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">connection</td><td>the connection handle </td></tr>
<tr><td class="paramname">config</td><td>the config information passed to <a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#ab6a56facfd217e5ff687aa4c012e8d68" title="Load an extension. ">WT_CONNECTION::load_extension</a> </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>zero on success and a non-zero error code on failure. See <a class="el" href="group__wt.html#error_returns">Error Returns</a> for details. </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="nop_encrypt_8c-example.html#a5">nop_encrypt.c</a>, and <a class="el" href="rotn_encrypt_8c-example.html#a11">rotn_encrypt.c</a>.</dd>
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<td class="memname">int wiredtiger_extension_terminate </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html">WT_CONNECTION</a> * </td>
<td class="paramname"><em>connection</em></td><td>)</td>
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<p>Optional cleanup function for an extension, called during <a class="el" href="struct_w_t___c_o_n_n_e_c_t_i_o_n.html#af535c517df851eeac8ebf3594d40b545" title="Close a connection. ">WT_CONNECTION::close</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">connection</td><td>the connection handle </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>zero on success and a non-zero error code on failure. See <a class="el" href="group__wt.html#error_returns">Error Returns</a> for details. </dd></dl>
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