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<h1>Db.del</h1>
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<h3><pre>
import com.sleepycat.db.*;
<p>
public int del(DbTxn txnid, Dbt key, int flags)
	throws DbException;
</pre></h3>
<h1>Description</h1>
<p>The Db.del method removes key/data pairs from the database.  The
key/data pair associated with the specified <b>key</b> is discarded from
the database.  In the presence of duplicate key values, all records
associated with the designated key will be discarded.
<p>If the file is being accessed under transaction protection, the
<b>txnid</b> parameter is a transaction ID returned from
<a href="../api_java/txn_begin.html">DbEnv.txn_begin</a>, otherwise, NULL.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>The Db.del method throws an exception that encapsulates a non-zero error value on
failure, and <a href="../ref/program/errorret.html#DB_NOTFOUND">Db.DB_NOTFOUND</a> if the specified <b>key</b> did not exist in
the file.
<h1>Errors</h1>
<p>The Db.del method may fail and throw an exception encapsulating a non-zero error for the following conditions:
<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.
</dl>
<p>If the operation was selected to resolve a deadlock, the
Db.del method will fail and
throw a <a href="../api_java/deadlock_class.html">DbDeadlockException</a> exception.
<p>The Db.del method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the Db.del method may fail and throw
a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>, in which case all subsequent Berkeley DB calls
will fail in the same way.
<h3>Class</h3>
<a href="../api_java/db_class.html">Db</a>
<h1>See Also</h1>
<a href="../api_java/db_close.html">Db.close</a>,
<a href="../api_java/db_cursor.html">Db.cursor</a>,
<a href="../api_java/db_del.html">Db.del</a>,
<a href="../api_java/db_fd.html">Db.fd</a>,
<a href="../api_java/db_get.html">Db.get</a>,
<a href="../api_java/db_get_byteswapped.html">Db.get_byteswapped</a>,
<a href="../api_java/db_get_type.html">Db.get_type</a>,
<a href="../api_java/db_join.html">Db.join</a>,
<a href="../api_java/db_key_range.html">Db.key_range</a>,
<a href="../api_java/db_open.html">Db.open</a>,
<a href="../api_java/db_put.html">Db.put</a>,
<a href="../api_java/db_remove.html">Db.remove</a>,
<a href="../api_java/db_set_bt_minkey.html">Db.set_bt_minkey</a>,
<a href="../api_java/db_set_cachesize.html">Db.set_cachesize</a>,
<a href="../api_java/db_set_errcall.html">Db.set_errcall</a>,
<a href="../api_java/db_set_errpfx.html">Db.set_errpfx</a>,
<a href="../api_java/db_set_flags.html">Db.set_flags</a>,
<a href="../api_java/db_set_h_ffactor.html">Db.set_h_ffactor</a>,
<a href="../api_java/db_set_h_nelem.html">Db.set_h_nelem</a>,
<a href="../api_java/db_set_lorder.html">Db.set_lorder</a>,
<a href="../api_java/db_set_pagesize.html">Db.set_pagesize</a>,
<a href="../api_java/db_set_q_extentsize.html">Db.set_q_extentsize</a>,
<a href="../api_java/db_set_re_delim.html">Db.set_re_delim</a>,
<a href="../api_java/db_set_re_len.html">Db.set_re_len</a>,
<a href="../api_java/db_set_re_pad.html">Db.set_re_pad</a>,
<a href="../api_java/db_set_re_source.html">Db.set_re_source</a>,
<a href="../api_java/db_stat.html">Db.stat</a>,
<a href="../api_java/db_sync.html">Db.sync</a>,
<a href="../api_java/db_upgrade.html">Db.upgrade</a>
and
<a href="../api_java/db_verify.html">Db.verify</a>.
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