static void testScripts(String directory) {

    TestUtil.deleteDatabase("test1");

    try {
      Class.forName("org.hsqldb.jdbc.JDBCDriver");

      String url = "jdbc:hsqldb:test1;sql.enforce_strict_size=true";
      String user = "******";
      String password = "";
      Connection cConnection = null;
      String[] filelist;
      String absolute = new File(directory).getAbsolutePath();

      filelist = new File(absolute).list();

      ArraySort.sort((Object[]) filelist, 0, filelist.length, new StringComparator());

      for (int i = 0; i < filelist.length; i++) {
        String fname = filelist[i];

        if (fname.startsWith("TestSelf") && fname.endsWith(".txt")) {
          print("Openning DB");

          cConnection = DriverManager.getConnection(url, user, password);

          testScript(cConnection, absolute + File.separator + fname);
          cConnection.close();
        }
      }
    } catch (Exception e) {
      e.printStackTrace();
      print("TestUtil init error: " + e.getMessage());
    }
  }
  SubQuery[] getSubqueries(Session session) {

    OrderedHashSet subQueries = null;

    for (int i = 0; i < targetRangeVariables.length; i++) {
      if (targetRangeVariables[i] == null) {
        continue;
      }

      OrderedHashSet set = targetRangeVariables[i].getSubqueries();

      subQueries = OrderedHashSet.addAll(subQueries, set);
    }

    for (int i = 0; i < updateExpressions.length; i++) {
      subQueries = updateExpressions[i].collectAllSubqueries(subQueries);
    }

    if (insertExpression != null) {
      subQueries = insertExpression.collectAllSubqueries(subQueries);
    }

    if (condition != null) {
      subQueries = condition.collectAllSubqueries(subQueries);
    }

    if (queryExpression != null) {
      OrderedHashSet set = queryExpression.getSubqueries();

      subQueries = OrderedHashSet.addAll(subQueries, set);
    }

    if (subQueries == null || subQueries.size() == 0) {
      return SubQuery.emptySubqueryArray;
    }

    SubQuery[] subQueryArray = new SubQuery[subQueries.size()];

    subQueries.toArray(subQueryArray);
    ArraySort.sort(subQueryArray, 0, subQueryArray.length, subQueryArray[0]);

    for (int i = 0; i < subQueryArray.length; i++) {
      subQueryArray[i].prepareTable(session);
    }

    return subQueryArray;
  }