https://pizza.rs/tags/deduplication/Recent content in Deduplication on INFINI PizzaHugoenhttps://pizza.rs/docs/references/search/request/collapse/Mon, 01 Jan 0001 00:00:00 +0000https://pizza.rs/docs/references/search/request/collapse/<h1 id="field-collapsing"> Field collapsing <a class="anchor" href="#field-collapsing">#</a> </h1> <p>Collapse the result list so each distinct value of a field appears at most once — &ldquo;best product per merchant&rdquo;, &ldquo;best article per author&rdquo; — without a terms aggregation, keeping full hit semantics (scores, source, highlight).</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sh" data-lang="sh"><span class="line"><span class="cl">POST /my-collection/_search </span></span></code></pre></div><h2 id="how-it-works"> How it works <a class="anchor" href="#how-it-works">#</a> </h2> <p>Collapse is engine-native and runs as a post-retrieval step. The collector normally stops at <code>from + size</code>, but collapse pages over GROUPS, so the engine first gathers a wider window — <code>max(1000, from + size)</code> hits (<code>COLLAPSE_WINDOW</code> in <code>lib/engine/src/search/mod.rs</code>) — in request sort order, then:</p>