PL SQL/Oracle中的这个CTE WITH子句有什么问题？

Question

我有以下查询。 以下查询WITH CTE，它返回4条记录。

正如我给出的评论，下面的Select查询有55个记录和And子句它应该删除这4条记录并返回51条记录。相反，它仅返回那4条记录。

只是为了测试，我评论说，AND子句，然后它按预期工作，并返回55 + 4 =总共59个记录。

如何解决此问题与CTE。哪里不对？

CREATE OR REPLACE PROCEDURE CUSTCONNECT.sp_GetPodConfigurationGridData( 
p_podURL   IN varchar2, --PodUrl 
p_serverType  IN varchar2, 
p_serverName  IN varchar2, 
p_publishedDate  IN date, 
P_RECORDSET   OUT SYS_REFCURSOR 
) 
AS 
BEGIN 
OPEN P_RECORDSET FOR 

--This has total of 4 Records 
WITH PodServerRecords(Key, value, Overwrite, ServerName, ServerType, PublishDate) AS ( 
select 
     PC.KeyId as Key, KeyIdValue as value, 'Pod' as Overwrite, '' as ServerName, '' as Servertype, PC.PublishDate 
    from (select 
      Keylog.*, row_number() over (partition by Keylog.KeyId order by Keylog.PublishDate desc) as RowNu 
      from PodConfigLog_Tab Keylog 
      where Keylog.URL = p_podURL 
      and Keylog.PublishDate >= p_publishedDate and Keylog.PublishDate <= sysdate 
     ) PC 
    where PC.RowNu = 1 and PC.IsActive = 'T' 
    UNION 
    select 
     PCBS.KeyId as Key, KeyIdValue as value, 'Server' as Overwrite, PCBS.ServerName, Servertype, PCBS.PublishDate 
    from (select 
      Serlog.*, PS.ServerType, row_number() over (partition by Serlog.KeyId order by Serlog.PublishDate desc) as RowNu 
      from PodConfigByServerLog_Tab Serlog 
      join PodServer_tab PS on PS.ServerName = Serlog.ServerName 
      and Serlog.URL = PS.URL 
      where Serlog.URL = p_podURL 
      and Serlog.ServerName = p_serverName 
      and Serlog.PublishDate >= p_publishedDate and Serlog.PublishDate <= sysdate 
     ) PCBS 
    where PCBS.RowNu = 1 and PCBS.IsActive = 'T' 

) 

    --This has total of 55 Records 
    select 
     PCK.KeyId as Key ,DefaultKeyIdValue as value,'Default' as Overwrite, '' as ServerName, '' as Servertype, PCK.PublishDate 
    from 
     (select 
      Keylog.*, row_number() over (partition by Keylog.KeyId order by Keylog.PublishDate desc) as RowNu 
      from PodConfigKeyLog_Tab Keylog 
      where Keylog.PublishDate >= p_publishedDate and Keylog.PublishDate <= sysdate 
     ) PCK 
    join POD_TAB PS on PS.URL = p_podURL 
    where PCK.RowNu = 1 and PCK.IsActive = 'T' 
    --This And caluse should remove those 4 Records and total Records should be 51. 
    and PCK.KeyId not in (
     select KeyId 
     from PodServerRecords 
    ) 
    UNION 
    --This is total of 4 Records 
    SELECT 
     Key, value, Overwrite, ServerName, ServerType, PublishDate 
    FROM PodServerRecords 
    Order By Key; 

END; 
/

Answer 1

您的问题是，CTE没有名为KeyId的列。您将其重命名为Key。但是，NOT IN有NULL值时出现意外的行为。您可以通过直接消除它们解决这个问题：

PCK.KeyId not in (
     select psr.KeyId 
     from PodServerRecords psr 
     where psr.KeyId IS NOT NULL 
    ) 

我建议使用NOT EXISTS代替：

NOT EXISTS (select 1 
      from PodServerRecords psr 
      where psr.KeyId = PCK.KeyId 
      ) 

这可能会解决您的问题。

其实，我在CTE中看不到KeyId。所以，我认为你想要：

NOT EXISTS (select 1 
      from PodServerRecords psr 
      where psr.Key = PCK.KeyId 
      ) 

注意前面的语句将返回错误，表明问题是错误的列。

Answer 2

我认为你应该删除你的查询的UNION部分因为它正在从PodServerRecords读取这4条记录。您的查询应该是

--This has total of 55 Records 

    select 
     PCK.KeyId as Key ,DefaultKeyIdValue as value,'Default' as Overwrite, '' as ServerName, '' as Servertype, PCK.PublishDate 
    from 
     (select 
      Keylog.*, row_number() over (partition by Keylog.KeyId order by Keylog.PublishDate desc) as RowNu 
      from PodConfigKeyLog_Tab Keylog 
      where Keylog.PublishDate >= p_publishedDate and Keylog.PublishDate <= sysdate 
     ) PCK 
    join POD_TAB PS on PS.URL = p_podURL 
    where PCK.RowNu = 1 and PCK.IsActive = 'T' 
    --This And caluse should remove those 4 Records and total Records should be 51. 
    and PCK.KeyId not in (
     select KeyId 
     from PodServerRecords 
    );