UNION ALL序列导致我想用来构建MAP的键值对列表。
所需的功能是这样的:
select id1, id2, map(collect_list(col)) as measurements
from
(
select id1, id2, "height" as col
union all
select id1, id2, count(*) as col from table1
union all
select id1, id2, "weight" as col
union all
select id1, id2, count(*) as col from table2
)
实施此方法的正确方法是什么?
我希望得到的结果是:
id1 id2 measurements
1 10 {"height": 10, "weight": 20}
2 20 {"height": 10, "weight": 20}
答案 0 :(得分:1)
你的要求不是很清楚,但看起来你需要像
这样的东西if (obj[key].constructor != Array || !obj.hasOwnProperty(key) ||
obj[key] == []) {
return 0;
}
我没有运行它但它应该工作。