docs: protected static String prettyPrint(Object obj){
  		StringBuilder sb = new StringBuilder();
  		if (obj == null){
  			sb.append("NULL");
  		} else 	if (obj instanceof Blob){
  			sb.append(formatLogParam((Blob)obj));
  		} else if (obj instanceof Clob){
  			sb.append(formatLogParam((Clob)obj));
  		} else if (obj instanceof Ref){
  			sb.append(formatLogParam((Ref)obj));
  		} else if (obj instanceof Array){
  			sb.append(formatLogParam((Array)obj));
  		} else if (obj instanceof String || obj instanceof Date){
  			sb.append("'" + obj.toString()+"'");
  		} else {
  			sb.append(obj.toString());
  		}
  		return sb.toString();
  	}