Oracle 尽管存在外连接，但查询未给出结果

Question

在下面的查询中，当我评论一行 AND EVT.EVT_EVNT_ID(+) = DPT.DPT_EVNT_ID 或在一行中添加外连接 (+) AND EVT.EVT_ENTITY_ID ='G' 查询将获取结果，否则它不会给出任何结果结果。 `

select *         from 
    (select B11.ext_db_id,B11.FRST_LINE_OF_PRFRD_NAME, E11.*, D1.D1_evnt_id,    
        (SELECT E1.E1_DT
           FROM  S1core.E1_EVNT_DT_DTLS E1
          WHERE E1.E1_ENTITY_ID = D1.D1_ENTITY_ID
          AND E1.E1_EVNT_ID     = D1.D1_EVNT_ID
          AND E1.E1_D1_ID      = D1.D1_D1_ID
          AND E1.E1_DT_TYP      = 'MEET'
          AND E1.E1_OPTN_SEQ_N  = '999'
          AND E1.STATUS          = 'AUTHD' ) "MEET_DATE"
         FROM  S1core.E1_EVNT_DT_DTLS E11,  S1core.SECURITY_ACCOUNT SFA,
         S1core.EXTRNL_SYS_DETAILS EXT,
         S1core.D1_DPOT_EVNT_DTLS D1,  S1core.IP_ACNT_RELATION i1,
         S1core.ELG_ELGBLTY E1,S1core.P1_D1_PRXY_DTLS P1, S1core.EVT_DTLS   EVT,
         S1core.BUSINESS_PARTNER B1, S1core.BUSINESS_PARTNER B11
        WHERE
        P1.P1_EVNT_ID(+)     = D1.D1_EVNT_ID                   
        AND B1.BP_ID          = i1.IP_ID
        AND SFA.BP_ID          = B11.BP_ID
        AND B11.OWNER_ENTITY  =  SFA.OWNER_ENTITY
        AND P1.P1_D1_ID(+)   = D1.D1_D1_ID
       AND P1.P1_ENTITY_ID(+) = D1.D1_ENTITY_ID
        AND P1.STATUS(+)        = 'AUTHD'
        AND EXT.LVL_REF    =    SFA.SCA_REF
        AND EXT.OWNER_ENTITY  =  SFA.owner_entity
        AND EXT.EXTRNL_SYS_ID  = '39'
        AND EXT.BP_ID = SFA.BP_ID
        AND EXT.LVL = 5
        AND E1.ELG_SEC_ID            = D1.D1_SEC_ID
        AND D1.D1_ENTITY_ID        = E1.ELG_ENTITY_ID
        AND D1.D1_EVNT_ID          = E1.ELG_EVNT_ID
        AND D1.D1_D1_ID           = E1.ELG_D1_ID
        AND E1.ELG_ENTITY_ID         = SFA.OWNER_ENTITY
        AND E1.ELG_ACNT_ID           = SFA.SCA_REF
        AND i1.owner_entity        = SFA.OWNER_ENTITY
        AND i1.owner_entity        = B1.OWNER_ENTITY
        AND i1.SCA_REF  = SFA.SCA_REF
        AND i1.stat              <> 2
        AND EVT.EVT_ENTITY_ID      ='G'
        AND EVT.EVT_EVNT_ID(+)       = D1.D1_EVNT_ID
        AND EVT.STATUS(+)            = 'AUTHD'
        AND E11.E1_ENTITY_ID       = D1.D1_ENTITY_ID
        AND E11.E1_EVNT_ID         = D1.D1_EVNT_ID
        AND E11.E1_D1_ID          = D1.D1_D1_ID
        AND D1.D1_EVNT_GRP         = 'MEETING'
        AND E1.ELG_FNL_ELGBL_QNTTY   > 0
        AND D1.D1_ENTITY_ID        = 'GSSIN' -- P_D1_ENTITY_ID
        AND B11.ext_db_id LIKE 'LICMF' -- P_GLOBAL_CUSTODIAN
         AND B1.ext_db_id LIKE '%' -- P_FUND_MANAGER
         AND SUBSTR(EXT.LEVEL_EXTNL_SYS,1,5) LIKE '%' -- P_SUB_ACCOUNT_ID
         AND SUBSTR(EXT.LEVEL_EXTNL_SYS,6,9) LIKE '%' -- P_SCHEMA_ID
         AND SUBSTR( D1.D1_EVNT_TYP, 1, 4 ) LIKE '%' -- P_EVENT_TYPE
        AND E11.E1_DT_TYP = 'MEET'
        and D1.D1_evnt_id='12457886544'
       AND D1.OU_ID  IN('17','80') -- ('S1 INDIA PC')
       ) ;

我是否遗漏了任何外部联接或查询是否存在任何其他问题，因为我可以看到 dpt_evnt_id='12457886544' 在所有表中都可用。

`

我试图通过评论 AND EVT.EVT_EVNT_ID(+) = DPT.DPT_EVNT_ID 并在 EVT.EVT_ENTITY_ID (+) ='G' 中添加外连接来运行此查询

Answer 1

你有：

AND EVT.EVT_ENTITY_ID  ='G'
AND EVT.EVT_EVNT_ID(+) = D1.D1_EVNT_ID
AND EVT.STATUS(+)      = 'AUTHD'

即使后两个有(+) ，第一个没有，所以与EVT的连接将被视为INNER JOIN而不是OUTER JOIN 。

您应该将代码转换为使用 ANSI 连接，因为这样会更容易发现此类问题。

注意：可能会有更多这样的问题。 但是，您的代码有很多连接，语法陈旧，我们无法验证我在找到第一个问题后停止查找的正确性。 您将需要调试所有内容以检查是否存在任何其他问题。