Google BigQuery：数组中元素的位置

Question

是否可以在 Google BigQuery 中获取元素在数组中的位置？ 类似 Postgresql 中的 array_postion 函数？

特别是我需要在未嵌套数组之后获取元素的数组位置：

WITH data_table AS
(SELECT '{"fruit":[{"apples":5,"oranges":10},{"apples":2,"oranges":4}]}' AS data)

SELECT fruit, ? as position
FROM data_table, UNNEST(JSON_EXTRACT_ARRAY(  data,  '$.fruit')) as fruit

fruit                     |  position
-------------------------------------
{"apples":5,"oranges":10} |  1
{"apples":2,"oranges":4}  |  2

我尝试使用 row_number() 解决方法，但我不确定是否排序

WITH data_table AS
(SELECT '{"fruit":[{"apples":5,"oranges":10},{"apples":2,"oranges":4}]}' AS data)

SELECT fruit, ROW_NUMBER() OVER() AS position
FROM data_table, UNNEST(JSON_EXTRACT_ARRAY(  data,  '$.fruit')) as fruit

Answer 1

这可以使用with offset:

WITH data_table AS
(SELECT '{"fruit":[{"apples":5,"oranges":10},{"apples":2,"oranges":4}]}' AS data)

SELECT fruit, i
FROM data_table, UNNEST(JSON_EXTRACT_ARRAY(  data,  '$.fruit')) as fruit with offset as i