I have a HIVE table which contains JSON as a column. I need to extract a struct in this JSON .But Lateral explode is not helping.

ahh 
@Rich_Learner please use the following query. I just tested. It should work.

WITH json_extract AS (
  SELECT 
    get_json_object(xml_data, '$.app.Id') AS ID,
    get_json_object(xml_data, '$.app.apply[0].flag') AS Flag,
    regexp_replace(regexp_replace(get_json_object(xml_data, '$.app.apply[0].Product'), '\\[|\\]', ''), '\\}\\,\\{', '\\}\\;\\{') AS products
  FROM check
)
SELECT 
  ID,
  Flag,
  get_json_object(product_data, '$.Code') AS Code,
  get_json_object(product_data, '$.Line') AS Line,
  get_json_object(product_data, '$.status') AS Status
FROM json_extract
LATERAL VIEW explode(split(products, ';')) p AS product_data;