项目从oracle迁移到sqlserver后,代码中分页的相对改动 编辑
场景是一个后台的管理项目,突然要把数据库从oracle改成sqlserver,于是把表啊数据之类的,完全迁移到sqlserver之后,代码中的ibatis的写好的oracle的分页,在基于sqlsever数据库的系统上,不能运行,比如oracle里的dual表,rownum等,sqlserver里没有。
Xml代码
<select id="getLogList" resultClass="monitorLog" parameterClass="monitorLog">
SELECT *
FROM (SELECT c.*, rownum r
from (select
LOG_ID logID,
LOG_OPERTOR logOpertor,
OPERTOR_TIME opertorTime,
LOG_DESC logDesc
from MONITOR_LOG a
WHERE 11 = 1
<isNotEmpty property = "dateStart" prepend = "and" >
to_char(a.OPERTOR_TIME,'yyyy-MM-dd hh24:mi:ss') >=#dateStart# and to_char(a.OPERTOR_TIME,'yyyy-MM-dd hh24:mi:ss') <=#dateEnd#
</isNotEmpty>
<isNotEmpty property = "logOpertor" prepend = "and" >
a.LOG_OPERTOR =#logOpertor#
</isNotEmpty>
order by OPERTOR_TIME desc) c)
where r >= #startRow#
AND rownum <= #pageSize#
以上是oracle的下,根据rownum来分页的,startRow和pageSize分别是实体类中对应的字段,开始行和页大小。
迁移到sqlserver之后,因为startRow和pageSize已经定了,所以修改的话,也得基于这两个字段。修改代码如下:
Xml代码
<select id="getLogList" resultClass="monitorLog" parameterClass="monitorLog">
SELECT TOP $pageSize$
LOG_ID logID,
LOG_OPERTOR logOpertor,
OPERTOR_TIME opertorTime,
LOG_DESC logDesc
from MONITOR_LOG a
WHERE 11 = 1
<isNotEmpty property = "dateStart" prepend = "and" >
CONVERT(varchar(100), a.OPERTOR_TIME, 23) >=#dateStart# and CONVERT(varchar(100), a.OPERTOR_TIME, 23) <=#dateEnd#
</isNotEmpty>
<isNotEmpty property = "logOpertor" prepend = "and" >
a.LOG_OPERTOR =#logOpertor#
</isNotEmpty>
and LOG_ID>=(
select max(LOG_ID) from (
select top $startRow$ LOG_ID from MONITOR_LOG order by LOG_ID
) as t
) order by LOG_ID
</select>
补充:综合编程 , 其他综合 ,