title: Is it possible to DROP FILTER PREDICATE only if it exists?
body: <p>I'm creating Row-Level Security in SQL server 2014.</p>
  
  <p>It's possible to DROP FILTER PREDICATE on my table Client like this:</p>
  
  <pre><code>ALTER SECURITY POLICY rls.tenantAccessPolicy
      DROP FILTER PREDICATE ON dbo.Client,
      DROP BLOCK PREDICATE ON dbo.Client
  GO
  </code></pre>
  
  <p>But if I execute this code twice in a row, I've got an error</p>
  
  <blockquote>
    <p>"The security policy 'rls.tenantAccessPolicy' does not contain a predicate on table 'dbo.Client'."</p>
  </blockquote>
  
  <p>Is there a way to DROP it only if it exists?</p>