在我的代码中，我有这个通用的hibernate查询，其中条件投影列表列出了选择字段，并设置了第一个/最大结果来限制行号。
private Criteria getCriteria(Status status, Class<?> T, String aliasName, String subTable, String subAlias, List<Criterion> criterionList, List<Order> orderList, ProjectionList projectionList, Integer firstResult, Integer maxResult, Session session) {
StringBuilder methodFullNameSb = new StringBuilder("Criteria: getCriteria(Status, Class<?>, String, String, String, List<Criterion>, List<Order>, ProjectionList,Integer, Integer)");
MethodLevelLogger methodLevelLogger = MethodLevelLogger.getCurrentInstance(methodFullNameSb.toString());
methodLevelLogger.start();
Criteria criteria = null;
try {
criteria = session.createCriteria(T, aliasName);
if (subAlias != null && !subAlias.isEmpty()) {
criteria.createAlias(subTable, subAlias).setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY).setReadOnly(true);
}
if (criterionList != null) {
for (Criterion criterion : criterionList) {
criteria.add(criterion);
}
}
if (orderList != null) {
for (Order order : orderList) {
criteria.addOrder(order);
}
}
//to setlect field
if (projectionList != null) {
criteria.setProjection(projectionList);
}
//to limit row number
if (firstResult != null && maxResult != null) {
criteria.setFirstResult(firstResult);
criteria.setMaxResults(maxResult);
}
// Set Cache MODE DISABLE
criteria.setCacheMode(CacheMode.IGNORE).setReadOnly(true);
} catch (HibernateException | NullPointerException e) {
ApplicationExceptionHandle.doApplicationExceptionHandleAPP001withStackTrace(status, e, log);
} catch (Exception exception) {
ApplicationExceptionHandle.doApplicationExceptionHandleAPP001withStackTrace(status, exception, log);
}
methodLevelLogger.end();
log.debug(methodLevelLogger.getMessageTimeDiff());
return criteria;
}
然而，没有限制行号，每个东西看起来都很好，如SQL日志中所示。
2016-05-31 16:49:41,769 INFO [stdout]:71 - Hibernate:
2016-05-31 16:49:41,769 INFO [stdout]:71 - /* criteria query */ select
2016-05-31 16:49:41,769 INFO [stdout]:71 - /*+index(this_ ORDHIS_IDX)*/ this_.ORDER_HISTORY_ID as H_ORDER_HISTORY_ID,
2016-05-31 16:49:41,769 INFO [stdout]:71 - this_.ORDER_TRAN_ID as y1_,
2016-05-31 16:49:41,769 INFO [stdout]:71 - this_.UUID as y2_,
2016-05-31 16:49:41,769 INFO [stdout]:71 - this_.MOBILE_NO as y3_,
2016-05-31 16:49:41,769 INFO [stdout]:71 - this_.MOBILE_SEGMENT as y4_,...
2016-05-31 16:49:41,779 INFO [stdout]:71 - from
2016-05-31 16:49:41,779 INFO [stdout]:71 - suiadm.SSC_ORDER_HISTORY this_,
2016-05-31 16:49:41,779 INFO [stdout]:71 - suiadm.SSC_ORDER_ITEM orderitems1_
2016-05-31 16:49:41,779 INFO [stdout]:71 - where
2016-05-31 16:49:41,779 INFO [stdout]:71 - this_.ORDER_HISTORY_ID=orderitems1_.ORDER_HISTORY_ID
2016-05-31 16:49:41,779 INFO [stdout]:71 - and this_.CREATE_BY=?
2016-05-31 16:49:41,779 INFO [stdout]:71 - and this_.SFF_STATUS in (
2016-05-31 16:49:41,779 INFO [stdout]:71 - ?, ?, ?, ?
2016-05-31 16:49:41,779 INFO [stdout]:71 - )
2016-05-31 16:49:41,779 INFO [stdout]:71 - and this_.MOBILE_SEGMENT in (
2016-05-31 16:49:41,779 INFO [stdout]:71 - ?, ?
2016-05-31 16:49:41,779 INFO [stdout]:71 - )
2016-05-31 16:49:41,779 INFO [stdout]:71 - and this_.CREATE_DATE between ? and ?
2016-05-31 16:49:41,779 INFO [stdout]:71 - and orderitems1_.EFF_CODE in (
2016-05-31 16:49:41,779 INFO [stdout]:71 - ?, ?
2016-05-31 16:49:41,779 INFO [stdout]:71 - )
2016-05-31 16:49:41,779 INFO [stdout]:71 - and this_.SERVICE_TYPE=?
无论如何，当我限制行号时，SQL如下
2016-05-31 17:00:46,561 INFO [stdout]:71 - Hibernate:
2016-05-31 17:00:46,561 INFO [stdout]:71 - select
2016-05-31 17:00:46,561 INFO [stdout]:71 - *
2016-05-31 17:00:46,561 INFO [stdout]:71 - from
2016-05-31 17:00:46,561 INFO [stdout]:71 - ( /* criteria query */ select
2016-05-31 17:00:46,561 INFO [stdout]:71 - /*+index(this_ ORDHIS_IDX)*/ this_.ORDER_HISTORY_ID as H_ORDER_HISTORY_ID,
2016-05-31 17:00:46,561 INFO [stdout]:71 - this_.ORDER_TRAN_ID as y1_,
2016-05-31 17:00:46,561 INFO [stdout]:71 - this_.UUID as y2_,
2016-05-31 17:00:46,561 INFO [stdout]:71 - this_.MOBILE_NO as y3_,
2016-05-31 17:00:46,561 INFO [stdout]:71 - this_.MOBILE_SEGMENT as y4_,.....
2016-05-31 17:00:46,579 INFO [stdout]:71 - from
2016-05-31 17:00:46,580 INFO [stdout]:71 - suiadm.SSC_ORDER_HISTORY this_,
2016-05-31 17:00:46,580 INFO [stdout]:71 - suiadm.SSC_ORDER_ITEM orderitems1_
2016-05-31 17:00:46,580 INFO [stdout]:71 - where
2016-05-31 17:00:46,580 INFO [stdout]:71 - this_.ORDER_HISTORY_ID=orderitems1_.ORDER_HISTORY_ID
2016-05-31 17:00:46,580 INFO [stdout]:71 - and this_.MOBILE_NO=?
2016-05-31 17:00:46,581 INFO [stdout]:71 - and this_.SFF_STATUS in (
2016-05-31 17:00:46,582 INFO [stdout]:71 - ?, ?, ?, ?
2016-05-31 17:00:46,582 INFO [stdout]:71 - )
2016-05-31 17:00:46,582 INFO [stdout]:71 - and this_.MOBILE_SEGMENT in (
2016-05-31 17:00:46,582 INFO [stdout]:71 - ?, ?
2016-05-31 17:00:46,583 INFO [stdout]:71 - )
2016-05-31 17:00:46,583 INFO [stdout]:71 - and this_.CREATE_DATE between ? and ?
2016-05-31 17:00:46,583 INFO [stdout]:71 - and orderitems1_.EFF_CODE in (
2016-05-31 17:00:46,583 INFO [stdout]:71 - ?, ?
2016-05-31 17:00:46,583 INFO [stdout]:71 - )
2016-05-31 17:00:46,583 INFO [stdout]:71 - and this_.SERVICE_TYPE=? )
2016-05-31 17:00:46,584 INFO [stdout]:71 - where
2016-05-31 17:00:46,584 INFO [stdout]:71 - rownum <= ?
而不是
select ... from ... where criteria1 and criteria2 and rownum < ?
我选择了子选择
select ... from select ... from where creiterai1 and criteria2 where rownum < ?
这是正常的休眠吗？或者我做错了什么？如果我想要
select ... from ... where criteria1 and criteria2 and rownum < ?
如何编辑我的代码？
答案 0 :(得分：1)
这是使用oracle获取结果集的第一页的一般方法。
它等同于您希望hibernate生成的查询。
请注意，对查询应用分页时，应对完整的结果集进行排序，否则，每次运行查询时可能会得到不同的结果。
order by子句将放在生成的子选择hibernate中（在限制到页面之前对完整的结果集进行排序）：
select
*
from
( /* criteria query */ select
/*+index(this_ ORDHIS_IDX)*/ this_.ORDER_HISTORY_ID as H_ORDER_HISTORY_ID,
this_.ORDER_TRAN_ID as y1_,
this_.UUID as y2_,
this_.MOBILE_NO as y3_,
this_.MOBILE_SEGMENT as y4_,.....
from
suiadm.SSC_ORDER_HISTORY this_,
suiadm.SSC_ORDER_ITEM orderitems1_
where
this_.ORDER_HISTORY_ID=orderitems1_.ORDER_HISTORY_ID
and this_.MOBILE_NO=?
and this_.SFF_STATUS in (
?, ?, ?, ?
)
and this_.MOBILE_SEGMENT in (
?, ?
)
and this_.CREATE_DATE between ? and ?
and orderitems1_.EFF_CODE in (
?, ?
)
and this_.SERVICE_TYPE=?
**order by ...**
)
where
rownum <= ?