      If used as input for <code class="literal">EXECUTE ... USING sqlda;</code> then NULL-pointer value means
        that the value for this field is non-NULL. Otherwise a valid pointer and <code class="literal">sqlitype</code>
        has to be properly set. Example:
</p><pre class="programlisting">
if (*(int2 *)sqldata-&gt;sqlvar[i].sqlind != 0)
    printf("value is NULL\n");
</pre><p>
       </p></dd><dt id="ECPG-INFORMIX-SQLDA-SQLNAME"><span class="term"><code class="literal">sqlname</code></span> <a 