code: protected boolean isDDLStatement(String[] sqlTokens) {
      if (sqlTokens.length > 0) {
        for (String statement : DDL_STATEMENTS) {
          if (sqlTokens[0].equalsIgnoreCase(statement))
            return true;
        }
      }
  
      return false;
    }
docs: Do a quick check if this SQL statement is a DDL statement
  
  @param sqlTokens The statement to check
  @return true if the SQL statement is a DDL statement