如何使用 OpenJson 将 JSON 列 headers 转换为小写

Question

我正在尝试解析 SQL 服务器中的 JSON 数据。 headers 列是大小写混合的。有没有办法将其转换为大写或小写。下面是代码：

SELECT  
pr.AuditEvent_Id as [AuditEvent_HttpHeaders_Id]
  ,[AuditEvent_HttpHeaders_ContentType]
  ,[AuditEvent_HttpHeaders_Accept]
  ,[AuditEvent_HttpHeaders_AcceptEncoding]
  ,[AuditEvent_HttpHeaders_AcceptLanguage]
  ,[AuditEvent_HttpHeaders_Authorization]
  ,[AuditEvent_HttpHeaders_Host]
  ,[AuditEvent_HttpHeaders_Referer]
  ,[AuditEvent_HttpHeaders_UserAgent]
  ,[AuditEvent_HttpHeaders_Origin]
FROM dbo.Audit_Resource pr
CROSS APPLY OpenJson(pr.HttpHeaders) WITH (
    [AuditEvent_HttpHeaders_ContentType] varchar(255) '$."content-Type"',
    [AuditEvent_HttpHeaders_Accept] varchar(255) '$.accept',
    [AuditEvent_HttpHeaders_AcceptEncoding] varchar(255) '$."accept-Encoding"',
    [AuditEvent_HttpHeaders_AcceptLanguage] varchar(255) '$."accept-Language"',
    [AuditEvent_HttpHeaders_Authorization] varchar(255) '$.authorization',
    [AuditEvent_HttpHeaders_Host] varchar(255) '$.host',
    [AuditEvent_HttpHeaders_Referer] varchar(255) '$.referer',
    [AuditEvent_HttpHeaders_UserAgent] varchar(255) '$."user-Agent"',
    [AuditEvent_HttpHeaders_Origin] varchar(255) '$.origin',)

例如：在某些情况下 '$."content-Type"' 是 '$."Content-Type"'。如何让它不区分大小写。

Answer 1

SELECT  
pr.AuditEvent_Id as [AuditEvent_HttpHeaders_Id]
  ,[AuditEvent_HttpHeaders_ContentType]
  ,[AuditEvent_HttpHeaders_Accept]
  ,[AuditEvent_HttpHeaders_AcceptEncoding]
  ,[AuditEvent_HttpHeaders_AcceptLanguage]
  ,[AuditEvent_HttpHeaders_Authorization]
  ,[AuditEvent_HttpHeaders_Host]
  ,[AuditEvent_HttpHeaders_Referer]
  ,[AuditEvent_HttpHeaders_UserAgent]
  ,[AuditEvent_HttpHeaders_Origin]
FROM dbo.Audit_Resource pr
CROSS APPLY ( values ( replace(
                       replace(
                       replace(
                       replace(pr.HttpHeaders,'Content-Type','content-type')
                       ,'Accept','accept')
                       ,'accept-Encoding','accept-encoding')
                       ,'accept-Language','accept-language')  -- ... Other Keys
                     ) )J(S)
CROSS APPLY OpenJson(J.S) WITH (
    [AuditEvent_HttpHeaders_ContentType] varchar(255) '$."content-Type"',
    [AuditEvent_HttpHeaders_Accept] varchar(255) '$.accept',
    [AuditEvent_HttpHeaders_AcceptEncoding] varchar(255) '$."accept-Encoding"',
    [AuditEvent_HttpHeaders_AcceptLanguage] varchar(255) '$."accept-Language"',
    [AuditEvent_HttpHeaders_Authorization] varchar(255) '$.authorization',
    [AuditEvent_HttpHeaders_Host] varchar(255) '$.host',
    [AuditEvent_HttpHeaders_Referer] varchar(255) '$.referer',
    [AuditEvent_HttpHeaders_UserAgent] varchar(255) '$."user-Agent"',
    [AuditEvent_HttpHeaders_Origin] varchar(255) '$.origin',)

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