Hive數組轉成多行

原始數據如下：

 

 轉換后效果：

 

 

實現方式：

-- 原數據

SELECT '[{"slot_seq":"1","status":"0","battery_sn":"K212EV14C3"},{"slot_seq":"10","status":"0","battery_sn":"K482GE13RT"},{"slot_seq":"3","status":"0","battery_sn":"E513GJ11XT"},{"slot_seq":"4","status":"0","battery_sn":"K377FH1BSK"},{"slot_seq":"5","status":"0","battery_sn":"E046EH142Y"},{"slot_seq":"7","status":"0","battery_sn":"L154GVA0CP"}]' AS json_column

-- hive sql  實現

select  get_json_object(j_column,'$.slot_seq') as slot_seq,
get_json_object(j_column,'$.status') as status,
get_json_object(j_column,'$.battery_sn') as battery_sn
from

(SELECT split(regexp_replace(regexp_extract(t.json_column, '(\\[)(.*?)(\\])', 2), '\\},\\{', '\\}|\\{'), '\\|') AS json_column
FROM (
	SELECT '[{"slot_seq":"1","status":"0","battery_sn":"K212EV14C3"},{"slot_seq":"10","status":"0","battery_sn":"K482GE13RT"},{"slot_seq":"3","status":"0","battery_sn":"E513GJ11XT"},{"slot_seq":"4","status":"0","battery_sn":"K377FH1BSK"},{"slot_seq":"5","status":"0","battery_sn":"E046EH142Y"},{"slot_seq":"7","status":"0","battery_sn":"L154GVA0CP"}]' AS json_column
) t
) a
lateral view explode(json_column) b as j_column