Hive将数组炸开

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2022-03-21

split:按特定符号切分为数组
explode:将数组数据炸开,单个select限制一个explode
LATERAL VIEW:侧写函数,可以使explode同其他字段一起查询

select 
    distinct c1
    ,case 
        when c2 = 'A级' then c2 
        when LOCATE('线',c2)=0 then concat(c2,'线')
        else c2 end as c2
      ,c3 
      ,c4
  from table as a
  
  LATERAL VIEW explode(split(a.c1,',')) a AS c1
  LATERAL VIEW explode(split(a.c2,',')) a AS c2
  where a.ds = '${yyyyMMdd,-1d}'

单独使用情况下:

select 
    explode(split(c1,',') ) as c1
from table
where ds = '${yyyyMMdd,-1d}'

spilt以后的数据,
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结果
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