private void dropStaleTables() throws SQLException {
    dbAccessor.dropTable(CLUSTER_CONFIG_MAPPING_TABLE);
    dbAccessor.dropTable(CLUSTER_VERSION_TABLE);
    dbAccessor.dropTable(SERVICE_COMPONENT_HISTORY_TABLE);
  }
drop {@value #CLUSTER_CONFIG_MAPPING_TABLE} and {@value #CLUSTER_VERSION_TABLE} tables.

@throws java.sql.SQLException
ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog260.java