Hive 配置单元嵌套查询左联接
我是hive的新手,我想实现以下查询Hive 配置单元嵌套查询左联接,hive,hiveql,hive-query,Hive,Hiveql,Hive Query,我是hive的新手,我想实现以下查询 select a.controlid, b.name as campaign, a.controlactivityid as activitysource, c.code as codemyaprc, c.label_en as label_en, c.label_fr as label_fr from bo_h_control.bridge
select a.controlid,
b.name as campaign,
a.controlactivityid as activitysource,
c.code as codemyaprc,
c.label_en as label_en,
c.label_fr as label_fr
from bo_h_control.bridgeactivity a
join suvh_econtrol.TMP_GPS_REF b ON a.controlcampaignid =
b.ps_cam_id
left join srv_h_a8460_fpc.activity c
ON a.controlactivityid=c.code
and c.date_creation= select
max(date_creation) from srv_h_a8460_fpc.activity
在最后一个左连接之前,它工作正常。嵌套查询显然未在配置单元中获得授权
如何处理此问题。使用子查询而不是联接表:
select a.controlid,
b.name as campaign,
a.controlactivityid as activitysource,
c.code as codemyaprc,
c.label_en as label_en,
c.label_fr as label_fr
from bo_h_control.bridgeactivity a
join suvh_econtrol.TMP_GPS_REF b ON a.controlcampaignid =
b.ps_cam_id
left join (select c.*, max(date_creation) over() as max_date_creation
from srv_h_a8460_fpc.activity c
) c ON a.controlactivityid=c.code
and c.date_creation=c.max_date_creation
或者最好将最后一个连接条件移动到子查询中的WHERE子句中:
select a.controlid,
b.name as campaign,
a.controlactivityid as activitysource,
c.code as codemyaprc,
c.label_en as label_en,
c.label_fr as label_fr
from bo_h_control.bridgeactivity a
join suvh_econtrol.TMP_GPS_REF b ON a.controlcampaignid =
b.ps_cam_id
left join (select * from
(
select c.*, max(date_creation) over() as max_date_creation
from srv_h_a8460_fpc.activity c
)c where max_date_creation=date_creation
) c ON a.controlactivityid=c.code