查看代码中的注释。转换步骤不是有意组合的，以便于理解：

with your_table as ( --use your_table instead of this 
select stack(4,'{"AR":["Fasdfadsfasd","Hasdfasdf"]}','{"DR":["Aasdfads","Baasdfasdf","Iasdfadsf","Zasdfasdf"]}','{"PR":["Easdfadsf","Gasdfadsfads"]}','{"SR":["Casdfasdf","Dasdfadsf","Jasdfasdfa"]}'
             ) as src
)

select max(AR) AR,max(DR) DR,max(PR) PR,max(SR) SR --group by position
from
(
select case when key='AR' then value end AR,--transpose
       case when key='DR' then value end DR,case when key='PR' then value end PR,case when key='SR' then value end SR,pos
from
(
select s.key,regexp_replace(v.value,'(^\\")|(\\"$)','') value,v.pos --remove quotes from value
from
(
select regexp_replace(m[0],'') key,regexp_replace(m[1],'\\[|\\]','') value --remove [] from value and unquote key
from
(
select split(
       regexp_replace(src,'\\{|\\}',''),--remove curly braces
       '[:]') as m --split map key and value
  from your_table t
)s
)s lateral view outer posexplode(split(value,'\\",\\"')) v as pos,value
)s
)s 
group by pos;

结果：

ar           dr           pr           sr
Fasdfadsfasd Aasdfads     Easdfadsf    Casdfasdf
Hasdfasdf    Baasdfasdf   Gasdfadsfads Dasdfadsf
NULL         Iasdfadsf    NULL         Jasdfasdfa
NULL         Zasdfasdf    NULL         NULL