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-<!--$Id: db_put.so,v 10.34 2000/09/16 22:27:56 bostic Exp $-->
-<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
-<!--All rights reserved.-->
-<html>
-<head>
-<title>Berkeley DB: Db::put</title>
-<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
-<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
-</head>
-<body bgcolor=white>
- <a name="2"><!--meow--></a>
-<table><tr valign=top>
-<td>
-<h1>Db::put</h1>
-</td>
-<td width="1%">
-<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
-</td></tr></table>
-<hr size=1 noshade>
-<tt>
-<h3><pre>
-#include &lt;db_cxx.h&gt;
-<p>
-int
-Db::put(DbTxn *txnid, Dbt *key, Dbt *data, u_int32_t flags);
-</pre></h3>
-<h1>Description</h1>
-<p>The Db::put method stores key/data pairs in the database. The default
-behavior of the Db::put function is to enter the new key/data
-pair, replacing any previously existing key if duplicates are disallowed,
-or adding a duplicate data item if duplicates are allowed. If the database
-supports duplicates, the Db::put method adds the new data value at the
-end of the duplicate set. If the database supports sorted duplicates,
-the new data value is inserted at the correct sorted location.
-<p>If the file is being accessed under transaction protection, the
-<b>txnid</b> parameter is a transaction ID returned from
-<a href="../api_cxx/txn_begin.html">DbEnv::txn_begin</a>, otherwise, NULL.
-<p>The <b>flags</b> parameter must be set to 0 or one of the following
-values:
-<p><dl compact>
-<p><dt><a name="DB_APPEND">DB_APPEND</a><dd>Append the key/data pair to the end of the database. For the
-DB_APPEND flag to be specified, the underlying database must be
-a Queue or Recno database. The record number allocated to the record is
-returned in the specified <b>key</b>.
-<p>There is a minor behavioral difference between the Recno and Queue access
-methods for the DB_APPEND flag. If a transaction enclosing a
-Db::put operation with the DB_APPEND flag aborts, the
-record number may be decremented (and later re-allocated by a subsequent
-DB_APPEND operation) by the Recno access method, but will not be
-decremented or re-allocated by the Queue access method.
-<p><dt><a name="DB_NODUPDATA">DB_NODUPDATA</a><dd>In the case of the Btree and Hash access methods, enter the new key/data
-pair only if it does not already appear in the database. If the
-key/data pair already appears in the database, <a href="../api_cxx/dbc_put.html#DB_KEYEXIST">DB_KEYEXIST</a> is
-returned. The DB_NODUPDATA flag may only be specified if the
-underlying database has been configured to support sorted duplicates.
-<p>The DB_NODUPDATA flag may not be specified to the Queue or Recno
-access methods.
-<p><dt><a name="DB_NOOVERWRITE">DB_NOOVERWRITE</a><dd>Enter the new key/data pair only if the key does not already appear in
-the database. If the key already appears in the database,
-<a href="../api_cxx/dbc_put.html#DB_KEYEXIST">DB_KEYEXIST</a> is returned. Even if the database allows duplicates,
-a call to Db::put with the DB_NOOVERWRITE flag set will
-fail if the key already exists in the database.
-</dl>
-<p>Otherwise, the Db::put method either returns a non-zero error value or throws an exception that
-encapsulates a non-zero error value on failure, and returns 0 on success.
-<h1>Errors</h1>
-<p>The Db::put method may fail and throw an exception or return a non-zero error for the following conditions:
-<p><dl compact>
-<p><dt>DB_LOCK_DEADLOCK<dd>The operation was selected to resolve a deadlock.
-</dl>
-<p><dl compact>
-<p><dt>EACCES<dd>An attempt was made to modify a read-only database.
-</dl>
-<p><dl compact>
-<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
-<p>A record number of 0 was specified.
-<p>An attempt was made to add a record to a fixed-length database that was too
-large to fit.
-<p>An attempt was made to do a partial put.
-</dl>
-<p><dl compact>
-<p><dt>ENOSPC<dd>A btree exceeded the maximum btree depth (255).
-</dl>
-<p>The Db::put method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
-If a catastrophic error has occurred, the Db::put method may fail and either
-return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> or throw an exception encapsulating
-<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>, in which case all subsequent Berkeley DB calls will fail
-in the same way.
-<h3>Class</h3>
-<a href="../api_cxx/db_class.html">Db</a>
-<h1>See Also</h1>
-<a href="../api_cxx/db_close.html">Db::close</a>,
-<a href="../api_cxx/db_cursor.html">Db::cursor</a>,
-<a href="../api_cxx/db_del.html">Db::del</a>,
-<a href="../api_cxx/db_err.html">Db::err</a>,
-<a href="../api_cxx/db_fd.html">Db::fd</a>,
-<a href="../api_cxx/db_get.html">Db::get</a>,
-<a href="../api_cxx/db_get_byteswapped.html">Db::get_byteswapped</a>,
-<a href="../api_cxx/db_get_type.html">Db::get_type</a>,
-<a href="../api_cxx/db_join.html">Db::join</a>,
-<a href="../api_cxx/db_key_range.html">Db::key_range</a>,
-<a href="../api_cxx/db_open.html">Db::open</a>,
-<a href="../api_cxx/db_put.html">Db::put</a>,
-<a href="../api_cxx/db_remove.html">Db::remove</a>,
-<a href="../api_cxx/db_set_bt_compare.html">Db::set_bt_compare</a>,
-<a href="../api_cxx/db_set_bt_minkey.html">Db::set_bt_minkey</a>,
-<a href="../api_cxx/db_set_bt_prefix.html">Db::set_bt_prefix</a>,
-<a href="../api_cxx/db_set_cachesize.html">Db::set_cachesize</a>,
-<a href="../api_cxx/db_set_dup_compare.html">Db::set_dup_compare</a>,
-<a href="../api_cxx/db_set_errcall.html">Db::set_errcall</a>,
-<a href="../api_cxx/db_set_errfile.html">Db::set_errfile</a>,
-<a href="../api_cxx/db_set_errpfx.html">Db::set_errpfx</a>,
-<a href="../api_cxx/db_set_flags.html">Db::set_flags</a>,
-<a href="../api_cxx/db_set_h_ffactor.html">Db::set_h_ffactor</a>,
-<a href="../api_cxx/db_set_h_hash.html">Db::set_h_hash</a>,
-<a href="../api_cxx/db_set_h_nelem.html">Db::set_h_nelem</a>,
-<a href="../api_cxx/db_set_lorder.html">Db::set_lorder</a>,
-<a href="../api_cxx/db_set_malloc.html">Db::set_malloc</a>,
-<a href="../api_cxx/db_set_pagesize.html">Db::set_pagesize</a>,
-<a href="../api_cxx/db_set_paniccall.html">Db::set_paniccall</a>,
-<a href="../api_cxx/db_set_q_extentsize.html">Db::set_q_extentsize</a>,
-<a href="../api_cxx/db_set_realloc.html">Db::set_realloc</a>,
-<a href="../api_cxx/db_set_re_delim.html">Db::set_re_delim</a>,
-<a href="../api_cxx/db_set_re_len.html">Db::set_re_len</a>,
-<a href="../api_cxx/db_set_re_pad.html">Db::set_re_pad</a>,
-<a href="../api_cxx/db_set_re_source.html">Db::set_re_source</a>,
-<a href="../api_cxx/db_stat.html">Db::stat</a>,
-<a href="../api_cxx/db_sync.html">Db::sync</a>,
-<a href="../api_cxx/db_upgrade.html">Db::upgrade</a>
-and
-<a href="../api_cxx/db_verify.html">Db::verify</a>.
-</tt>
-<table><tr><td><br></td><td width="1%">
-<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
-</td></tr></table>
-<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
-</body>
-</html>