title: How to check if a oracle database is compatible with REGEXP_LIKE?
body: <p>I'm trying to use the <code>Regexp_like</code> function in my oracle SQL queries, but no matter what I'm am trying I get the "ORA-00920: invalid relational operator" error. I have tried with regexp_like arguments from samples that should work, and simply changed the referenced field, and still it fails. The version is:</p>
  
  <pre><code>Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
  PL/SQL Release 11.2.0.3.0 - Production
  CORE    11.2.0.3.0  Production
  TNS for Solaris: Version 11.2.0.3.0 - Production
  NLSRTL Version 11.2.0.3.0 - Production
  </code></pre>
  
  <p>However I suspect that some compatibility level is set so that the regexp_like function isn't supported. How can I check this?</p>