Question

NULLS LAST无效 - 我在后续查询中收到以下错误： FAILED：ParseException第41：9行在'ASC'附近'NULLS'丢失EOF

不确定是什么问题，查询否则运行并排序很好，没有空的最后一个语句。

set hive.cli.print.header=true;

SELECT 
    P3P.campaign_id, 
    P3P.campaign_name, 
    P3P.strategy_id, 
    P3P.strategy_name, 
    P3P.segment_id,
    P3P.full_path,
    COUNT(*) AS impressions,
    COUNT(DISTINCT P3P.mm_uuid) AS distinct_users,
    SUM(P3P.media_cost) AS media_cost, 
    SUM(P3P.total_ad_cost) AS total_ad_cost, 
    SUM(P3P.total_spend) AS total_spend,
    AVG(P3P.total_spend_cpm) AS cpm,
    SUM(CASE WHEN AE.event_type = 'click' THEN 1 ELSE NULL END) AS clicks,
    SUM(CASE WHEN AE.event_type = 'conversion' THEN 1 ELSE NULL END) AS conversions,
    (SUM(CASE WHEN AE.event_type = 'click' THEN 1 ELSE NULL END) / (COUNT(P3P.mm_uuid))) AS ctr,
    (SUM(CASE WHEN AE.event_type = 'click' THEN 1 ELSE NULL END) / (SUM(CASE WHEN AE.event_type = 'conversion' THEN 1 ELSE NULL END))) AS ctc,
    (SUM(P3P.total_spend)/(SUM(CASE WHEN AE.event_type = 'click' THEN 1 ELSE NULL END))) AS cost_per_click,
    (SUM(P3P.total_spend) /(SUM(CASE WHEN AE.event_type = 'conversion' THEN 1 ELSE NULL END))) AS cpa,
    ((SUM(CASE WHEN AE.event_type = 'conversion' THEN 1 ELSE NULL END))*1000)/COUNT(*) AS rr_per_1k_imps,
    AVG(P3P.segment_cpm) AS segment_cpm,
    (SUM(P3P.segment_spend)/(SUM(CASE WHEN AE.event_type = 'click' THEN 1 ELSE NULL END))) AS segment_cpc,
    (SUM(P3P.segment_spend)/(SUM(CASE WHEN AE.event_type = 'conversion' THEN 1 ELSE NULL END))) AS segment_cpc

FROM tmp_perfon3p2 P3P

LEFT JOIN mm_attributed_events AE ON AE.mm_uuid = P3P.mm_uuid 
    AND AE.event_date BETWEEN '2015-06-14' and '2015-06-21'
    AND  AE.organization_id = '100426'
    AND AE.agency_id = '101286'
    AND AE.advertiser_id = '108076'
GROUP BY
    P3P.campaign_id, 
    P3P.campaign_name, 
    P3P.strategy_id, 
    P3P.strategy_name, 
    P3P.segment_id,
    P3P.full_path
ORDER BY
    cpa ASC NULLS LAST
LIMIT 100;

Answer 1

错误很清楚。 Hive不喜欢ASC和NULLS之间第41行的内容每Cloudera Documentation

注意：由于Hive查询目前无法使用NULLS FIRST和NULLS LAST关键字，因此使用这些关键字创建的所有视图都无法通过Hive获取

修改（解决方法）：

假设您有这种汇总数据

col1
----
10.1
NULL
NULL
2.1
3.7

<强>查询：

select col1
from (
  select col1
    , case when col1 is null then 0 else 1 end as flg
  from inner_query
  order by flg desc, col1 asc) x

<强>输出：

col1
----
2.1
3.7
10.1
NULL
NULL

如何通过ASC与NULLS LAST在HIVE中订购

1 个答案: