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<pre class="programlisting">dbc dup
[-position] </pre>
<p>
The <span class="emphasis"><em>dbc</em></span> <span class="bold"><strong>dup</strong></span>
command duplicates the cursor, creates a new cursor that uses the same
transaction and locker ID as the original cursor. This is useful when
an application is using locking and requires two or more cursors in
the same thread of control.
</p>
<p>
The options are as follows:
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<p>
<span class="bold"><strong>-position</strong></span>
</p>
<p>
The newly created cursor is initialized to refer to the same position
in the database as the original cursor and hold the same locks. If the
<span class="bold"><strong>-position</strong></span> flag is not specified, the
created cursor is uninitialized and will behave like a cursor newly
created using the <span class="emphasis"><em>db</em></span> <span class="bold"><strong>cursor</strong></span> command.
</p>
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<p>
The <span class="emphasis"><em>dbc</em></span> <span class="bold"><strong>dup</strong></span>
command returns 0 on success, and in the case of error, a Tcl error is
thrown.
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