使用 json_extract_array 提取嵌套的 JSON：在填充的數據字段上獲取 null 結果？

Question

我正在嘗試使用此查詢從這個嵌套的 json 文件（JSON 文件的圖像）中提取以下配置數據：

SELECT 
  json_extract_scalar(f, '$.affiliationTypes') as affiliation_types
  , json_extract_scalar(f, '$.organizationTypes') as organization_types
  , json_extract_scalar(f, '$.verificationTypes') as verification_types
  , json_extract_scalar(f, '$.notifierIds') as notifier_ids
  , json_extract_scalar(f, '$.metadata') as metadata
  , json_extract_scalar(body, '$.accountId') as account_id
FROM `my database`
left join unnest(json_extract_array(body, '$.request.config')) as f
LIMIT 100;

但是我得到了所有選定配置數據的 null 結果。 我什至過濾了我知道仍然沒有列出配置數據的帳戶/請求。 有任何想法嗎？ （其中許多字段都有我剛剛為這篇文章刪除的數據）。

例如，我想將第一個 select 語句轉換為 output：STUDENT_PART_TIME, EMPLOYEE, FACULTY, VETERAN, STUDENT_FULL_TIME, ACTIVE_DUTY

對於那些不想打開圖像的人，這是我感興趣的 json 塊：

"body": {
    "accountId":""
    ,"activeAffiliationTypes":[]
    ,"affiliations":[]
    ,"aggregateState":"OPEN"
    ,"birthMonth":null
    ,"birthYear":null
    ,"customerFacingConclusiveVerificationType":null
    ,"customerFacingRequestedAffiliationType":""
    ,"dataSourceErrorCodes":null
    ,"dataSourceResponseHttpStatusCategory":"UNKNOWN"
    ,"dataSourceResponseHttpStatusCode":-1
    ,"emailDomain":null
    ,"errorCodes":[]
    ,"errors":[]
    ,"issuedRewards":[]
    ,"metadata":{}
    ,"request": {
        "accountId":""
        ,"active":false
        ,"assetMap":{}
        ,"config": {
            "affiliationTypes":["STUDENT_PART_TIME","EMPLOYEE","FACULTY","VETERAN","STUDENT_FULL_TIME","ACTIVE_DUTY"]
            ,"assetTypes":[]
            ,"consolationRewardIds":[]
            ,"ignoreVerifierClasses":null
            ,"locale":"en_US"
            ,"metadata":{}
            ,"notifierIds":null
            ,"organizationTypes":[]
            ,"rewardIds":[]
            ,"testMode":false
            ,"verificationModelClass":""
            ,"verificationSourceClasses":[]
            ,"verificationTypes":["AUTHORITATIVE"]
            }
        ,"created":null

Answer 1

SELECT      STRING(c)
FROM        'my database'
LEFT JOIN   UNNEST(
              JSON_QUERY_ARRAY(body, '$.request.config.affiliationTypes')
            ) c