protected void addColumnsToRequestScheduleTable() throws SQLException {
    dbAccessor.addColumn(REQUEST_SCHEDULE_TABLE_NAME,
        new DBAccessor.DBColumnInfo(REQUEST_SCHEDULE_BATCH_TOLERATION_LIMIT_PER_BATCH_COLUMN_NAME, Short.class, null,
            null, true));
    dbAccessor.addColumn(REQUEST_SCHEDULE_TABLE_NAME,
        new DBAccessor.DBColumnInfo(REQUEST_SCHEDULE_PAUSE_AFTER_FIRST_BATCH_COLUMN_NAME, Boolean.class, null,
            null, true));    
  }
The {@link UpgradeCatalog280} upgrades Ambari from 2.7.2 to 2.8.0.
ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog280.java