stamp variable that <code class="literal">ts2</code>
        points to from the timestamp variable that <code class="literal">ts1</code> points to
        and will store the result in the interval variable that <code class="literal">iv</code>
        points to.
       </p><p>
        Upon success, the function returns 0 and a negative value if an
        error occurred.
       </p></dd><dt id="ECPG-INFORMIX-FUNCTIONS-DTTOASC"><span class="term"><code class="function">dttoasc</code></span> <a href="#ECPG-INF