ss="term"><code class="literal">IF NOT EXISTS</code></span></dt><dd><p>
      Do not throw an error if a relation with the same name already
      exists; simply issue a notice and leave the table unmodified.
     </p></dd><dt><span class="term"><em class="replaceable"><code>table_name</code></em></span></dt><dd><p>
      The name (optionally schema-qualified) of the table to be created.
     </p></dd><dt><span class="term"><em class="replaceable"><code>column_name</code></em></span></dt><dd><p>
      The n