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<h1>DbTxn::abort</h1>
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<h3><pre>
#include <db_cxx.h>
<p>
int
DbTxn::abort();
</pre></h3>
<h1>Description</h1>
<p>The DbTxn::abort method causes an abnormal termination of the
transaction. The log is played backwards and any necessary recovery
operations are initiated through the <b>recover</b> function specified
to <a href="../api_cxx/env_open.html">DbEnv::open</a>. After the log processing is completed, all locks
held by the transaction are released. As is the case for
<a href="../api_cxx/txn_commit.html">DbTxn::commit</a>, applications that require strict two-phase locking
should not explicitly release any locks.
<p>In the case of nested transactions, aborting a parent transaction causes
all children (unresolved or not) of the parent transaction to be aborted.
<p>Once the DbTxn::abort method returns, the <a href="../api_cxx/txn_class.html">DbTxn</a> handle may not
be accessed again.
<p>The DbTxn::abort 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 DbTxn::abort 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 DbTxn::abort 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>Classes</h3>
<a href="../api_cxx/dbenv_class.html">DbEnv</a>, <a href="../api_cxx/txn_class.html">DbTxn</a>
<h1>See Also</h1>
<a href="../api_cxx/env_set_tx_max.html">DbEnv::set_tx_max</a>,
<a href="../api_cxx/env_set_tx_recover.html">DbEnv::set_tx_recover</a>,
<a href="../api_cxx/env_set_tx_timestamp.html">DbEnv::set_tx_timestamp</a>,
<a href="../api_cxx/txn_abort.html">DbTxn::abort</a>,
<a href="../api_cxx/txn_begin.html">DbEnv::txn_begin</a>,
<a href="../api_cxx/txn_checkpoint.html">DbEnv::txn_checkpoint</a>,
<a href="../api_cxx/txn_commit.html">DbTxn::commit</a>,
<a href="../api_cxx/txn_id.html">DbTxn::id</a>,
<a href="../api_cxx/txn_prepare.html">DbTxn::prepare</a>
and
<a href="../api_cxx/txn_stat.html">DbEnv::txn_stat</a>.
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