https://blog.foundev.pro/tags/data-modeling.htmlRecent content in Data Modeling on Random RamblingsHugoen-usMon, 22 Sep 2014 22:12:58 +0000https://blog.foundev.pro/2014/09/22/cassandra-query-patterns-not-using-the-in-query-for-multiple-partitions.htmlMon, 22 Sep 2014 22:12:58 +0000https://blog.foundev.pro/2014/09/22/cassandra-query-patterns-not-using-the-in-query-for-multiple-partitions.html<h1>Cassandra Query Patterns: Not using the “in” query for multiple partitions.</h1> So lets say you’re doing you’re best to data model all around one partition. You’ve done your homework and all you queries look like this: <div class="highlight"><pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-sql" data-lang="sql"><span style="display:flex;"><span><span style="color:#fff"> </span><span style="color:#cf222e">SELECT</span><span style="color:#fff"> </span><span style="color:#0550ae">*</span><span style="color:#fff"> </span><span style="color:#cf222e">FROM</span><span style="color:#fff"> </span>my_keyspace<span style="color:#1f2328">.</span>users<span style="color:#fff"> </span><span style="color:#cf222e">where</span><span style="color:#fff"> </span>id<span style="color:#fff"> </span><span style="color:#0550ae">=</span><span style="color:#fff"> </span><span style="color:#0550ae">1</span><span style="color:#fff"> </span></span></span></code></pre></div><p>Over time as features are added however, you make some tradeoffs and need to start doing queries across partitions. At first there are only a few queries like this.</p>