code: private boolean updateSVScalar(String currentValue) {
          String newValue = m_dbObj.getFieldValue(m_fieldName);
          boolean bUpdated = false;
          if (Utils.isEmpty(newValue)) {
              if (!Utils.isEmpty(currentValue)) {
                  m_dbTran.deleteScalarValueColumn(m_tableDef, m_dbObj.getObjectID(), m_fieldName);
                  unindexTerms(currentValue);
                  bUpdated = true;
              }
          } else if (!newValue.equals(currentValue)) {
              updateScalarReplaceValue(currentValue, newValue);
              bUpdated = true;
          }
          return bUpdated;
      }
docs: Replace our SV scalar's value.