title: postgres: select rows where a parameter is anything
body: <p>i am passing parameters in a query in the WHERE clause. I would like to create a case where any param in the where is fine (like obmitting the value).</p>
  
  <p>for example:</p>
  
  <p><code>SELECT * FROM USERS WHERE lang=%s</code></p>
  
  <p>i can pass in the placeholder strings like 'en', 'it', 'es'. but what about if i want to take everything in the lang column? like if i didn't mention the lang in the where clause?</p>
  
  <p>is there something like:</p>
  
  <p><code>SELECT * FROM USERS WHERE lang=ANYTHING</code></p>
  
  <p>??</p>