Hive 使用正则表达式拆分模式

Question

I have a problem with split pattern in hive query.
sample string from the table:

['EN', 'FR', 'DE', 'IT', 'JA', 'RU', 'ZH', 'ES', 'ZH']

and now with the split function I would like to return this string in this way:

EN  
FR  
...  
ZH  

at first I tried this way: split(data.language, ',')[1]
I don't know how I can get rid of square brackets and quotation marks.

Answer 1

Use regexp_replace to replace [|]|' characters then split the string column then explode the array.

select explode(split(regexp_replace(sample,"[\\[|\\'|\\]]",""),",")) 
   from (
select string("['EN', 'FR', 'DE', 'IT', 'JA', 'RU', 'ZH', 'ES', 'ZH']")as sample
     )e;

--output
--+---+
--|col|
--+---+
--| EN|
--| FR|
--| DE|
--| IT|
--| JA|
--| RU|
--| ZH|
--| ES|
--| ZH|
--+---+