docs: private int onStartEscapeSequence(String sql, StringBuffer sb,
                                        int i) throws SQLException {
  
          sb.setCharAt(i++, ' ');
  
          i = StringUtil.skipSpaces(sql, i);
  
          if (sql.regionMatches(true, i, "fn ", 0, 3)
                  || sql.regionMatches(true, i, "oj ", 0, 3)
                  || sql.regionMatches(true, i, "ts ", 0, 3)) {
              sb.setCharAt(i++, ' ');
              sb.setCharAt(i++, ' ');
          } else if (sql.regionMatches(true, i, "d ", 0, 2)
                     || sql.regionMatches(true, i, "t ", 0, 2)) {
              sb.setCharAt(i++, ' ');
          } else if (sql.regionMatches(true, i, "call ", 0, 5)) {
              i += 4;
          } else if (sql.regionMatches(true, i, "?= call ", 0, 8)) {
              sb.setCharAt(i++, ' ');
              sb.setCharAt(i++, ' ');
  
              i += 5;
          } else if (sql.regionMatches(true, i, "escape ", 0, 7)) {
              i += 6;
          } else {
              i--;
  
              throw Util.sqlException(
                  Error.error(
                      ErrorCode.JDBC_CONNECTION_NATIVE_SQL, sql.substring(i)));
          }
  
          return i;
      }