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<h1>Dbc::del</h1>
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<h3><pre>
#include <db_cxx.h>
<p>
int
Dbc::del(u_int32_t flags);
</pre></h3>
<h1>Description</h1>
<p>The Dbc::del method deletes the key/data pair to which the cursor
refers.
<p>When called on a cursor opened on a database that has been made into a
secondary index using the <a href="../api_cxx/db_associate.html">Db::associate</a> method, the <a href="../api_cxx/db_del.html">Db::del</a> method
deletes the key/data pair from the primary database and all secondary
indices.
<p>The <b>flags</b> parameter is currently unused, and must be set to 0.
<p>The cursor position is unchanged after a delete, and subsequent calls to
cursor functions expecting the cursor to refer to an existing key will
fail.
<p>
If the element has already been deleted, the Dbc::del method will return DB_KEYEMPTY.
If the cursor is not yet initialized, the Dbc::del method either returns EINVAL or throws an exception that encapsulates EINVAL.
Otherwise, the Dbc::del 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 Dbc::del method may fail and throw an exception or return a non-zero error for the following conditions:
<p><dl compact>
<p><dt>DB_SECONDARY_BAD<dd>A secondary index references a nonexistent primary key.
</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.
</dl>
<p><dl compact>
<p><dt>EPERM <dd>Write attempted on read-only cursor when the <a href="../api_cxx/env_open.html#DB_INIT_CDB">DB_INIT_CDB</a> flag was
specified to <a href="../api_cxx/env_open.html">DbEnv::open</a>.
</dl>
<p>If the operation was selected to resolve a deadlock, the
Dbc::del method will fail and
and either return <a href="../ref/program/errorret.html#DB_LOCK_DEADLOCK">DB_LOCK_DEADLOCK</a> or
throw a <a href="../api_cxx/deadlock_class.html">DbDeadlockException</a> exception.
<p>The Dbc::del 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 Dbc::del method may fail and
either return <a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a> or throw a
<a href="../api_cxx/runrec_class.html">DbRunRecoveryException</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_cxx/dbc_class.html">Dbc</a>
<h1>See Also</h1>
<a href="../api_cxx/dbc_list.html">Database Cursors and Related Methods</a>
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