Bigquery - 如何將兩個數組壓縮成一個？

Question

如果我在BigQuery中有兩個我知道大小相同的數組。我如何將它們壓縮到一個結構數組或類似的兩個元素數組的數組？

以下查詢給我所有可能的x和y組合，這不是我想要的。

WITH test AS (
    SELECT 
    ['a', 'b', 'c'] as xs, 
    [1, 2, 3] as ys 
) 
SELECT struct(x, y) as pairs 
FROM test, unnest(xs) as x, unnest(ys) as y 

我希望得到的東西是這樣的：

+--------+--------+ 
| pair.x | pair.y | 
+--------+--------+ 
| a  | 1  | 
| b  | 2  | 
| c  | 3  | 
+--------+--------+ 

Answer 1

使用WITH OFFSET和支架操作：

WITH test AS (
    SELECT 
    ['a', 'b', 'c'] as xs, 
    [1, 2, 3] as ys 
) 
SELECT struct(x, ys[OFFSET(off)] as y) as pairs 
FROM test, unnest(xs) as x WITH OFFSET off;