title: ERROR: operator does not exist: integer = integer[]
body: <p>I'm trying to create a small function that will return all the clients in an array but I keep bumping into errors.</p>
  
  <pre><code>DO $$
  DECLARE
      c_ids INTEGER[] := array[12879,16759];
  BEGIN
    SELECT *
    FROM   client
    WHERE  id IN (c_ids);
  END $$;
  </code></pre>
  
  <p>What would be the right way to do something like this? I need the c_ids to be a variable because I will be using it in many places in the query (the sample straight forward query is not the end query).</p>