【发布时间】：2010-11-17 02:00:36
【问题描述】：
我使用 NHibernate 已经有一段时间了，但主要是使用基于约定的自动持久性模型生成，然后对对象执行基本的 CRUD 操作。
我现在需要对遗留系统执行一个相当讨厌的查询以及一堆参数（大部分 where 子句需要参数化）。我不清楚是否应该定义单个对象，然后尝试实现复杂的查询，或者只是使用本机 SQL 来定义查询。我也不清楚在 hbm.xml 文件中定义查询的正确语法。接下来是本机 SQL 查询。感谢任何可以帮助我解决这个问题的人。
WITH CTE AS ( SELECT
substr(KEY1||KEY2||KEY3||'-'||digits(KEY4)||'-'||digits(KEY5),1,17) KEY_ID,
SUM(CASE WHEN BATCH between 200801001 and 200812999 THEN TRANSACTION_AMOUNT ELSE 0 END) AS _2008AMOUNT,
SUM(CASE WHEN BATCH between 200901001 and 200912999 THEN TRANSACTION_AMOUNT ELSE 0 END) AS _2009AMOUNT,
SUM(CASE WHEN BATCH between 201001001 and 201012999 THEN TRANSACTION_AMOUNT ELSE 0 END) AS _2010AMOUNT
FROM _SCHEMA.TRANSACTIONS
WHERE OWNER='02'
AND TRANSACTION_TYPE in ('A','B')
AND BATCH between 200801000 AND 201012999
GROUP BY KEY1, KEY2, KEY3, KEY4, KEY5
HAVING SUM(CASE WHEN BATCH between 200801001 and 200812999 THEN TRANSACTION_AMOUNT ELSE 0 END) 0
OR SUM(CASE WHEN BATCH between 200901001 and 200912999 THEN TRANSACTION_AMOUNT ELSE 0 END) 0
OR SUM(CASE WHEN BATCH between 201001001 and 201012999 THEN TRANSACTION_AMOUNT ELSE 0 END) 0
)
SELECT
B.OWNER
,CTE1.MAX_ITEM_AMOUNT
,CTE1.SUM_ITEM_AMOUNT
,B.PRIMARY_SECONDARY_IDENTITY
,B.PRIMARY_ID
,B.PRIMARY_NAME
,B.KEY_ID
,B.KEY_AMOUNT
,CASE(B.KEYCLASS) WHEN 'C' THEN 'CLASS1' WHEN 'S' THEN 'CLASS2' WHEN 'M' THEN 'CLASS3' WHEN 'F' THEN 'CLASS4' END AS KEYCLASS
,NA.PRIMARY_CT AS PRIMARY_CITY
,NA.PRIMARY_ST AS PRIMARY_STATE
,B.KEY_EFFECTIVE_DATE
,B.KEY_ENTRY_DATE
,CTE._2008AMOUNT
,CTE._2009AMOUNT
,CTE._2010AMOUNT
,B.EMPLOYEE_NAME
FROM CTE
JOIN _SCHEMA.TABLE2 B ON CTE.KEY_ID = B.KEY_ID
JOIN (
SELECT
PRIMARY_SECONDARY_IDENTITY
, MAX(ITEM_AMOUNT) AS MAX_ITEM_AMOUNT
, SUM(ITEM_AMOUNT) AS SUM_TTEM_AMOUNT
FROM CTE
JOIN _SCHEMA.TABLE2 B ON CTE.KEY_ID = B.KEY_ID
GROUP BY PRIMARY_SECONDARY_IDENTITY
) CTE1 ON CTE1.PRIMARY_SECONDARY_IDENTITY = B.PRIMARY_SECONDARY_IDENTITY
JOIN _SCHEMA.TABLE3 NA ON B.PRIMARY_ID = NA.KEY1 || DIGITS(NA.KEY2)
ORDER BY MAX_ITEM_AMOUNT DESC, PRIMARY_SECONDARY_IDENTITY
【问题讨论】：
-
我的回答是否回答了问题？如果是这样，请接受它，以便为我们 SO 的同事寻找这样的解决方案提供一个好的解决方案。
标签： sql nhibernate nhibernate-mapping