rd">proc</span> <a href="#first%2CRawPostgresQuery"><span class="Identifier">first</span></a><span class="Other">(</span><span class="Identifier">self</span><span class="Other">:</span> <a href="postgres_types.html#RawPostgresQuery"><span class="Identifier">RawPostgresQuery</span></a><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">Future</span><span class="Other">[</span><span class="Identifier">Option</span><span class="Other">[</span><span class="Identifier">JsonNode</spa