docs: @Override
      public void deleteAll() throws LockingException {
          Connection conn = null;
          Statement stmnt = null;
          try {
              String sql = "DELETE FROM " + LOCK_TABLE;
              if (log.isDebugEnabled()) log.debug("RDBMEntityLockStore.deleteAll(): " + sql);
  
              conn = RDBMServices.getConnection();
              try {
                  stmnt = conn.createStatement();
                  int rc = stmnt.executeUpdate(sql);
                  if (log.isDebugEnabled()) {
                      String msg = "Deleted " + rc + " locks.";
                      log.debug("RDBMEntityLockStore.deleteAll(): " + msg);
                  }
              } finally {
                  if (stmnt != null) stmnt.close();
              }
          } catch (SQLException sqle) {
              throw new LockingException("Problem deleting locks", sqle);
          } finally {
              RDBMServices.releaseConnection(conn);
          }
      }