ad_csv</span>(<span class="st">&quot;path/to/your/file&quot;</span>, ..., <span class="at">guess_max =</span> <span class="cn">Inf</span>)</span></code></pre></div>
<p>Why isn’t this the default? Why not do this all the time? Because column type guessing basically adds another pass through the data, in addition to the main parsing.</p>
<p>If you routinely use <code>guess_max = Inf</code>, you’re basically processing every file twice, in its entirety. If you only work with small files, this is fine. But 