[英]Unrecognised name: when using UNNEST WHERE in BigQuery
我正在嘗試根據此博客在 BigQuery 中進行過濾,但我無法使該模式正常工作。
博客中的可重現示例非常有效。
SELECT event_name, event_timestamp, user_pseudo_id,
event_params
FROM `firebase-public-project.analytics_153293282.events_20181003`
WHERE event_name = "level_complete_quickplay"
SELECT event_name, event_timestamp, user_pseudo_id,
(SELECT value.int_value FROM UNNEST(event_params)
WHERE key = "value") AS score
FROM `firebase-public-project.analytics_153293282.events_20181003`
WHERE event_name = "level_complete_quickplay"
當我在自己的表上嘗試此操作時,我收到錯誤Unrecognised name:
。 我試圖在玩具表nested_seq
中重現錯誤。
WITH sequences AS (
SELECT
[0, 1, 1, 2, 3, 5] AS some_numbers
UNION ALL SELECT [2, 4, 8, 16, 32] AS some_numbers
UNION ALL SELECT [5, 10] AS some_numbers
),
-- table containing repeated record
nested_seq AS (
SELECT
some_numbers,
some_numbers[OFFSET(1)] AS offset_1,
some_numbers[ORDINAL(1)] AS ordinal_1
FROM sequences
)
-- transformation to extract single value from array
SELECT *
FROM nested_seq
LEFT JOIN (SELECT
some_numbers
FROM UNNEST(some_numbers)
WHERE some_numbers = 2)
-- Unrecognized name: some_numbers at [21:19]
我期望的是some_numbers
的元素可以被提取,這樣我就可以在不增加行數的情況下取消嵌套數組。
排 | 一些數字 | 偏移量_1 | ordinal_1 |
---|---|---|---|
1 | 2 | 1 | 0 |
2 | 2 | 4 | 2 |
3 | null | 10 | 5 |
... some_numbers 的元素可以被提取,這樣我就可以在不增加行數的情況下取消嵌套數組。
考慮下面的“修復”
WITH sequences AS (
SELECT
[0, 1, 1, 2, 3, 5] AS some_numbers
UNION ALL SELECT [2, 4, 8, 16, 32] AS some_numbers
UNION ALL SELECT [5, 10] AS some_numbers
)
SELECT # some_numbers,
(SELECT some_number
FROM t.some_numbers some_number
WHERE some_number = 2
) some_number,
some_numbers[OFFSET(1)] AS offset_1,
some_numbers[ORDINAL(1)] AS ordinal_1
FROM sequences t
與 output
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