hive map类型转多行
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map类型转多行
将“a”:“b”,“c”:“d”,“e”:“f”转成3行
SELECT a.c1,
a.c_map,
b.map_key,
b.map_value
FROM (
SELECT 'test' AS c1,
MAP('a', 'b', 'c', 'd', 'e', 'f') AS c_map
) a
LATERAL VIEW
EXPLODE(c_map) b AS map_key,
map_value;
输出结果
c1 c_map map_key map_value
test "a":"b","c":"d","e":"f" a b
test "a":"b","c":"d","e":"f" c d
test "a":"b","c":"d","e":"f" e f
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