 always <code class="literal">yyyy-mm-dd</code>, so you need
        to allocate at least 11 bytes (including the zero-byte terminator) for the
        string.
       </p><p>
        The function returns 0 on success and a negative value in case of
        error.
       </p><p>
        Note that ECPG's implementation differs from the <span class="productname">Informix</span>
        implementation. In <span class="productname">Informix</span> the format can be influenced by setting
        environment varia