
<dd><p>A character string specifying the name of the index
to be created. By default, this uses the name of the table
(without the schema) and the name of the columns as follows:
<code>&lt;table_name&gt;_&lt;column_names&gt;_idx</code>.</p></dd>


<dt id="arg-unique">unique<a class="anchor" aria-label="anchor" href="#arg-unique"></a></dt>
<dd><p>Logical. Causes the system to check for duplicate
values in the table when the index is created (if data already
exist) and each time data is added. Attempts to in