title: Laravel 5 Error occurs while inserting into sql table with sequence_id
body: <p>I am trying to insert data to oracle sql and nothing happened but this error message </p>
  
  <blockquote>
    <p>Error Code : 1722 Error Message : ORA-01722: invalid number Position :
    162 Statement : insert into SLS_test (call_id, phone_number,
    operator_name, call_comment, complaint, spon_id, technical, served,
    serve_comment, call_time, serve_time) values (:p0, :p1, :p2, :p3, :p4,
    :p5, :p6, :p7, :p8, :p9, :p10) Bindings :
    [call_id_seq.nextval,call_id_seq.nextval,996,996,asd,asd,asd,asd,asd,asd,asd,asd,0,0,0,0,asd,asd,2018-07-31
    16:09:09,2018-07-31 16:09:09,2018-07-31 16:09:09,2018-07-31 16:09:09]</p>
  </blockquote>
  
  <hr>
  
  <p>My WelcomeController.php :</p>
  
  <pre><code>public function create(Request $req)
  {
      $phone_number = $req -&gt; input('phone_number');
      $operator_name = $req -&gt; input('operator_name');
      $call_comment = $req -&gt; input('call_comment');
      $complaint = $req -&gt; input('complaint');
      $spon_id = $req -&gt; input('spon_id');
      $technical = $req -&gt; input('technical');
      $served = $req -&gt; input('served');
      $serve_comment = $req -&gt; input('serve_comment');
      $ctime = new DateTime();
      $stime = new DateTime();
      $data = array("call_id" =&gt; "call_id_seq.nextval" , "phone_number"=&gt;$phone_number,"operator_name"=&gt;$operator_name,"call_comment"=&gt;$call_comment,"complaint"=&gt;$complaint,"spon_id"=&gt;$spon_id,"technical"=&gt;$technical,"served"=&gt;$served,"serve_comment"=&gt;$serve_comment,"call_time"=&gt;$ctime,"serve_time"=&gt;$stime);
      DB::table('test')-&gt;insert($data);
  }
  </code></pre>