code: public void setAttributePropertyInDB(final String attributeName, final String propertyName, final String value)
              throws DevFailed {
          xlogger.entry(propertyName);
  
          // insert value in db only if input value is different and not a
          // default value
          // if (checkCurrentValue) {
          // final String presentValue = getAttributePropertyFromDB(attributeName, propertyName);
          // final boolean isADefaultValue = presentValue.isEmpty()
          // && (value.equalsIgnoreCase(AttributePropertiesImpl.NOT_SPECIFIED)
          // || value.equalsIgnoreCase(AttributePropertiesImpl.NO_DIPLAY_UNIT)
          // || value.equalsIgnoreCase(AttributePropertiesImpl.NO_UNIT) || value
          // .equalsIgnoreCase(AttributePropertiesImpl.NO_STD_UNIT));
          // if (!isADefaultValue && !presentValue.equals(value) && !value.isEmpty() && !value.equals("NaN")) {
          // LOGGER.debug("update in DB {}, property {}= {}", new Object[] { attributeName, propertyName, value });
          // final Map<String, String[]> propInsert = new HashMap<String, String[]>();
          // propInsert.put(propertyName, new String[] { value });
          // DatabaseFactory.getDatabase().setAttributeProperties(deviceName, attributeName, propInsert);
          // }
          // } else {
          logger.debug("update in DB {}, property {}= {}", new Object[] { attributeName, propertyName, value });
          final Map<String, String[]> propInsert = new HashMap<String, String[]>();
          propInsert.put(propertyName, new String[] { value });
          DatabaseFactory.getDatabase().setAttributeProperties(deviceName, attributeName, propInsert);
          // }
          xlogger.exit();
      }
docs: Set attribute property in tango db
  
  @param attributeName
  @param propertyName
  @param value
  @throws DevFailed