连接语句中出现错误"ORA-00932:不一致的数据类型:预期 - 得到了BLOB"

Question

我在下面的存储过程中执行有问题.当我在下面的存储过程中添加列时,我
收到错误.是一个blob字段.如果我删除这个字段一切正常.我不知道为什么会这样.请帮忙....ORA-00932: inconsistent datatypes: expected - got BLOBFM.FAXFILE_BLOBFAXFILE_BLOB

        CREATE OR REPLACE Procedure HCADMIN.Proc_GetFaxDetailsByDate
         ( 
           FromDate varchar2 default null,
           ToDate varchar2 default null,
           FaxNo varchar2 default null,
           ClaimNo varchar2 default null,
            NspCode varchar2 default null,
           PolicyNo varchar2 default null,
           HEGICNo varchar2 default null,
           cur_faxdetails OUT SYS_REFCURSOR
           )
        IS
       BEGIN
      OPEN cur_faxdetails For

      Select distinct
       FM.RECORDNO_NUM,
       FM.CLAIMNO_VAR,
       FM.FAXNO_VAR,
       FM.FAXSTATUS_VAR,
       FM.FAXTYPE_VAR,
       FM.USERNAME_VAR,
       FM.HEGIC_NO_VAR, 
       FM.RESEND_NO_NUM,
       FM.RESNDCOUNT_NUM,
       TO_date(FM.TIMESTAMP_DTE,'dd/MM/yyyy') as "TIMESTAMP_DTE",
       FR.RECIPIENTFAXNO_VAR,
       FM.FAXFILE_BLOB

       From TPA_FAXMASTER FM Left  join TPA_FAXRECIPIENT FR on                                      FM.RECORDNO_NUM=FR.RECORDNO_NUM 
 WHERE 
      NVL(FM.FAXNO_VAR,'0')=NVL(FaxNo,NVL(FM.FAXNO_VAR,'0')) And
      NVL(FR.RECIPIENTFAXNO_VAR,'0')=NVL(FaxNo,NVL(FR.RECIPIENTFAXNO_VAR,'0')) And          
      NVL(FM.CLAIMNO_VAR,'0')=NVL(ClaimNo,NVL(FM.CLAIMNO_VAR,'0')) And  
      NVL(FM.NSPID_VAR,'0')=NVL(NspCode,NVL(FM.NSPID_VAR,'0')) And
      NVL(FM.POLICYNO_VAR,'0')=NVL(PolicyNo,NVL(FM.POLICYNO_VAR,'0')) And  
      NVL(FM.HEGIC_NO_VAR,'0')=NVL(HEGICNo,NVL(FM.HEGIC_NO_VAR,'0')) And    
      (NVL(TO_date(FM.TIMESTAMP_DTE,'dd/MM/yyy'),To_Date('09/09/9999','dd/MM/yyyy')) 
      BETWEEN NVL (TO_date(FromDate,'dd/MM/yyyy'), NVL(TO_date(FM.TIMESTAMP_DTE,'dd/MM/yyy'),To_Date('09/09/9999','dd/MM/yyyy')))
      AND  NVL (TO_date(ToDate,'dd/MM/yyyy'), NVL(TO_date(FM.TIMESTAMP_DTE,'dd/MM/yyy'),To_Date('09/09/9999','dd/MM/yyyy'))));
EXCEPTION
 WHEN NO_DATA_FOUND THEN
   Null;
 WHEN OTHERS THEN
   -- Consider logging the error and then re-raise
   RAISE;
 END;
 /

Answer 1

如果select_list包含LOB列,则不能指定DISTINCT.

尝试使用标量子查询来获取BLOB字段.