无效操作：window函数滞后不支持默认参数；

Question

我有 MSSQL Server 脚本，我需要将其重写为 Redshift

这是脚本的原始部分

    SELECT  cog.OrganizationId,
        cog.ClientId,
        REPLACE(REPLACE(AM, 'IAM: ', 'IMP: '),'AM: ', '') AS AM,
        u.ProcedureCodeString,
        t.MonthBilled,
        t.Month,
        t.Year,
        u.ClientCharges,
        LAG(u.ClientCharges,1,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) AS PreviosMonthCharges,
        LAG(u.ClientCharges,2,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) AS TwoMonthsAgoCharges,
        LAG(u.ClientCharges,3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) AS ThreeMonthsAgoCharges,
        LAG(u.ClientCharges,4,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) AS FourMonthsAgoCharges,
        LAG(t.MonthBilled,3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) AS ThreeMonthsAgoDate,
        DATEDIFF(d,CASE WHEN LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) END,CONVERT(datetime,t.MonthBilled) ) AS DateDifCheck,
        b.FirstMonth,
        b.FirstFeature,
        CASE WHEN u.ClientCharges > 0
                AND LAG(u.ClientCharges,1,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,2,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,4,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) = 0
                AND LAG(t.MonthBilled,3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) > b.FirstMonth
                AND DATEDIFF(d,CASE WHEN LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) END,CONVERT(datetime,t.MonthBilled) ) < 95
                AND DATEDIFF(d,CASE WHEN LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(datetime,t.MonthBilled),3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.ClientId,t.Year,t.Month) END,CONVERT(datetime,t.MonthBilled) ) > 88
                AND u.ProcedureCodeString <> b.FirstFeature
                THEN 1 ELSE 0 END AS CommissionReportFlag

FROM    dbo.Contacts_ClientOrganization cog WITH(NOLOCK)

这是我重写的方式

    SELECT  cog.organizationid,
        cog.clientid,
        REPLACE(REPLACE(AM, 'IAM: ', 'IMP: '),'AM: ', '') AS AM,
        u.ProcedureCodeString,
        t.MonthBilled,
        t.Month,
        t.Year,
        u.ClientCharges,
        LAG(u.ClientCharges,1,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) AS PreviosMonthCharges,
        LAG(u.ClientCharges,2,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) AS TwoMonthsAgoCharges,
        LAG(u.ClientCharges,3,0) OVER (PARTITION BY cog.ClientId, u.ProcedureCodeString ORDER BY cog.сlientid,t.Year,t.Month) AS ThreeMonthsAgoCharges,
        LAG(u.ClientCharges,4,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.сlientid,t.Year,t.Month) AS FourMonthsAgoCharges,
        LAG(t.MonthBilled,3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) AS ThreeMonthsAgoDate,
        DATEDIFF(d,CASE WHEN LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) END,CONVERT(TIMESTAMP,t.MonthBilled) ) AS DateDifCheck,
        b.FirstMonth,
        b.FirstFeature,
        CASE WHEN u.ClientCharges > 0
                AND LAG(u.ClientCharges,1,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,2,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) > 0
                AND LAG(u.ClientCharges,4,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) = 0
                AND LAG(t.MonthBilled,3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) > b.FirstMonth
                AND DATEDIFF(d,CASE WHEN LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) END,CONVERT(TIMESTAMP,t.MonthBilled) ) < 95
                AND DATEDIFF(d,CASE WHEN LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) = 0 THEN NULL ELSE LAG(CONVERT(TIMESTAMP,t.MonthBilled),3,0) OVER (PARTITION BY cog.clientid, u.ProcedureCodeString ORDER BY cog.clientid,t.Year,t.Month) END,CONVERT(TIMESTAMP,t.MonthBilled) ) > 88
                AND u.ProcedureCodeString <> b.FirstFeature
                THEN 1 ELSE 0 END AS CommissionReportFlag

FROM    public.contacts_client_organization cog

但我现在收到这个错误

[42601][500310] Amazon Invalid operation: Default parameter not be supported for window function lag; java.lang.RuntimeException: com.amazon.support.exceptions.ErrorException: Amazon Invalid operation: Default parameter not be supported for window function lag;

我该如何解决这个问题？

Answer 1

我在官方文档中找到了这个问题的答案

  LAG (value_expr [, offset ])
[ IGNORE NULLS | RESPECT NULLS ]
OVER ( [ PARTITION BY window_partition ] ORDER BY window_ordering )

我有默认值，但是 reshift 说我只需要偏移量，所以只需删除默认值，就可以了

无效操作：window函数滞后不支持默认参数；

Invalid operation: Default parameter not be supported for window function lag;

sql

window-functions

amazon-redshift