@Override
  public List<String> extractData(ResultSet rs) throws SQLException, DataAccessException {
    List<String> dbsUpdated = new ArrayList<>();
    while (rs.next()) {
      dbsUpdated.add(rs.getString(1));
    }
    return dbsUpdated;
  }
Returns the databases updated by txnId.
Queries TXN_TO_WRITE_ID using txnId.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/jdbc/queries/GetTxnDbsUpdatedHandler.java