DbSession session = db.openSession(false);
try {
Migration45Mapper mapper = session.getMapper(Migration45Mapper.class);
List<RuleParameter> templateRuleParams = mapper.selectAllTemplateRuleParameters();
Multimap<Integer, RuleParameter> templateRuleParamsByRuleId = ArrayListMultimap.create();
for (RuleParameter templateRuleParam : templateRuleParams) {
templateRuleParamsByRuleId.put(templateRuleParam.getRuleId(), templateRuleParam);
}