如何在 Oracle PLSQL 中从 JSON 读取或访问动态嵌套对象？

Question

我有下面的 JSON，我想读取discountDetail对象下的65300、230935、231832对象中的所有字段。问题是 65300、230935、231832 对象是动态的并且事先不知道。这些是在运行时创建的 id。有没有办法从 JSON 读取这样的动态嵌套对象？

{
  "responseHeader": {
    "transactionId": "357910e9558654b6:20f4dee6:18d59ad95c2:-800056572",
    "status": {
      "code": "SUCCESS",
      "type": "S",
      "description": "TRANSACTION SUCCESSFUL"
    },
    "discountDetail": {
      "65300": {
        "discountId": "65300",
        "discountName": "Distributor Standard Discount - USD",
        "discountDescription": "Standard - Distributor Standard Discount - USD",
        "discountGroup": "Standard",
        "modifierLineTypeCode": "DIS",
        "discountMethodCode": "%",
        "modifierNumber": "Distributor Standard Discount - USD",
        "discountLineNumber": "Line, %",
        "listHeaderId": "0.0",
        "listLineId": "0.0",
        "priceBreakTypeCode": "N",
        "prorationTypeCode": "N",
        "postTermClause": false,
        "pricingPhaseId": "2",
        "accrualIndicator": "N",
        "automaticIndicator": "N",
        "updateIndicator": "Y",
        "appliedIndicator": "Y",
        "overRideableIndicator": "Y"
      },
      "230935": {
        "discountId": "230935",
        "discountName": "BR-Deal Registration-USD",
        "discountDescription": "Promotion-BR-Hunt-210731-10660",
        "discountGroup": "Promotion",
        "modifierLineTypeCode": "DIS",
        "discountMethodCode": "%",
        "modifierNumber": "BR-Deal Registration-USD",
        "discountLineNumber": "Line,%",
        "listHeaderId": "1566939",
        "listLineId": "254610462",
        "priceBreakTypeCode": "N",
        "discountType": "ES",
        "adjustmentMethodCode": "Additive",
        "pricingPhaseId": "2.0",
        "updateAllowableIndicator": "N",
        "updateIndicator": "Y",
        "appliedIndicator": "Y",
        "printOnInvoiceIndicator": "N"
      },
      "231832": {
        "discountId": "231832",
        "discountName": "BR-Special Offers-USD",
        "discountDescription": "Promotion-BR-MSSB-220730-12374",
        "discountGroup": "Promotion",
        "modifierLineTypeCode": "DIS",
        "discountMethodCode": "%",
        "modifierNumber": "BR-Special Offers-USD",
        "discountLineNumber": "Line,%",
        "listHeaderId": "561690",
        "listLineId": "94777454",
        "priceBreakTypeCode": "N",
        "prorationTypeCode": "N",
        "postTermClause": false,
        "pricingPhaseId": "2",
        "accrualIndicator": "N",
        "automaticIndicator": "N",
        "updateAllowableIndicator": "N",
        "updateIndicator": "Y",
        "appliedIndicator": "Y",
        "printOnInvoiceIndicator": "N",
        "overRideableIndicator": "N"
      }
    },
    "qualifiedPromotions": {
      "230935": {
        "promotionId": "230935",
        "promotionVersion": "25",
        "promotionCode": "BR-Hunt-210731-10660",
        "bundleType": "",
        "channelProgramName": "Deal Registration",
        "name": "Hunting",
        "discType": "ES",
        "autoApply": "N",
        "promotionDiscountType": "Additive",
        "startDate": "2022-12-21",
        "endDate": "2023-06-04",
        "status": "EXPIRED"
      },
      "231832": {
        "promotionId": "231832",
        "promotionVersion": "10",
        "promotionCode": "BR-MSSB-220730-12374",
        "bundleType": "ARCHITECTURE",
        "channelProgramName": "Special Offers",
        "name": "Meraki Smart Spaces Bundle - EEA",
        "discType": "ES",
        "startDate": "2023-02-10",
        "endDate": "2023-07-29",
        "status": "EXPIRED"
      }
    },
    "disqualifiedPromotions": {
      "233681": {
        "promotionId": "233681",
        "promotionCode": "PP-Fast-171028-02253",
        "disqualifyReasons": [
          {
            "code": "D6102",
            "message": "This promotion has expired."
          }
        ]
      }
    },
    "analyticalInfo": {
      "REQUEST_PARSE_TIME": 0.442318,
      "DC_CALL_TIME": 635,
      "DC_TOTAL_TIME": 635,
      "TOTAL_E2E_TIME": 1034,
      "SAVM_TOTAL_TIME": 160,
      "CR_PROCESS_TIME": 233,
      "MDM_PROCESS_TIME": 47,
      "PCV_INVOCATION_TIME": 118,
      "BUNDLE_DISCOUNT_SERVICE_TIME": 153,
      "LPS_CALL_TIME": 99,
      "DEAL_DETAILS_LOG": 47,
      "PGTMV_PROCESS_TIME": 26,
      "CR_ES_INVOCATION_TIME": 232,
      "GEC_SVC_CALL_TIME": 15,
      "LPS_TOTAL_TIME": 100,
      "PREPROCESS_TIME": 3
    }
  }
}

我想读取discountDetail对象下的65300、230935、231832动态嵌套对象中的所有字段。为什么它是动态的，因为这些是运行时生成的值？

Answer 1

JSON_TABLE 和 JSON_QUERY 都不支持 PATH 作为 SQL 表达式，因此您必须在 PL/SQL 中执行此操作才能使用动态 SQL。 此查询将为您提供“discountDetail”内容的所有路径，您可以从中构建返回实际内容的动态查询：

select p,
    regexp_replace(p, '.*"([0-9]+)".*','\1') as id
from 
    json_table(
        (select json_dataguide(js) from jsondata),
        '$[*]'
        columns (
            p PATH '$."o:path"'
        )
    )
where to_number(regexp_replace(p, '.*"([0-9]+)".*','\1') default null on conversion error) is not null
;


$.responseHeader.discountDetail."65300" 65300
$.responseHeader.discountDetail."65300".discountId  65300
$.responseHeader.discountDetail."65300".listLineId  65300
$.responseHeader.discountDetail."65300".discountName    65300
$.responseHeader.discountDetail."65300".listHeaderId    65300
$.responseHeader.discountDetail."65300".discountGroup   65300
...
$.responseHeader.discountDetail."230935"    230935
$.responseHeader.discountDetail."230935".discountId 230935
$.responseHeader.discountDetail."230935".listLineId 230935
$.responseHeader.discountDetail."230935".discountName   230935
...