e
        format mask to use (<code class="literal">fmtstr</code>) and a pointer to the timestamp
        variable that should hold the result of the operation
        (<code class="literal">dtvalue</code>).
       </p><p>
        This function is implemented by means of the <a class="xref" href="ecpg-pgtypes.html#PGTYPESTIMESTAMPDEFMTASC"><code class="function">PGTYPEStimestamp_defmt_asc</code></a> function. See the documentation
        there for a list of format specifiers that can be used.
       </p><p