Smart connection see question to the ASF data Cube

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  Code
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  Hi, I have a stupid question on the performance of cube generation. By choosing the precalc %, is linear (or nearly linear) construction time to that? for example if you select 10% going to be 3 times faster than the selection of 30%? Also, is it fair to assume that if only 10% of the values are precalculated, an average end-user queries have to hit 3 times more data and therefore be about 3 times slower?
  
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• Smart Connect bug

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• Error: CONNECTION loop in the user data

  CONNECT IN a loop in the user data:

  Table X (sample data were actually lines 35K)

  --------------

  CODE CASE OLD_ID New_id PERSON AUTH                                                           

  01 ab122 1234 0001 AU123 99393

  07 vv353 7872 0919 FV982 78282

  01 ab122 1982 9929 99393 AU123

  04 hjsss 8839 8302 JK920 32320

  01 ab122 0001 1982 AU123 99393

  05 cg899 6728 32322 IKL020 65252

  07 w353 0919 8282 FV982 78282

  now I need to order these data comparing the values of the line to old_id new_id for each combination of code, person, case

  need output like below

  Table X

  --------------

  CODE CASE OLD_ID New_id PERSON AUTH                                                           

  01 ab122 1234 0001 AU123 99393

  01 ab122 0001 1982 AU123 99393

  01 ab122 1982 9929 99393 AU123

  04 hjsss 8839 8302 JK920 32320

  05 cg899 6728 32322 IKL020 65252

  07 vv353 7872 0919 FV982 78282

  07 w353 0919 8282 FV982 78282

  to get to what I use:

  -Request-

  Select * from table_x

  Start by old_id not in)

  Select new_id

  from table_x

  )

  CONNECT BY old_id new_id PRIOR =

  AND code = code PRIOR

  AND case EARLIER case =

  PER person = person PREREQUISITE

  -Request-

  works very well with the sample data, but the problem is when executed with actual table that has 35K record...

  Cause: The condition specified in a CONNECT BY clause caused a loop in the application, where the next record to be selected is a descendant of itself. When this happens, it may be no end to the query.

  Action: Check the CONNECT BY clause and remove the circular reference.

  Thank you

  AK

  Hello

  CONNECT_BY_ISCYCLE is a pseudo-column that you can use in a query of CONNECTION BY NOCYCLE.  It is separated from the CONNECT BY clause.

  Try this:

  Select code, "BREAKS", person

  , SYS_CONNECT_BY_PATH (old_id, "/") AS path

  from table_x

  where CONNECT_BY_ISCYCLE = 1

  Start by old_id not in)

  Select new_id

  from table_x

  )

  CONNECT BY NOCYCLE Old_id = new_id PRIOR

  AND code = code PRIOR

  AND 'CASE' = 'BOX' PRIOR

  PER person = person PREREQUISITE

  ;

  I hope that answers your question.
  If not, post a small example data (CREATE TABLE and only relevant columns, INSERT statements) and also publish outcomes from these data.
  Explain, using specific examples, how you get these results from these data.
  Always say what version of Oracle you are using (for example, 11.2.0.2.0).

  See the FAQ forum: https://forums.oracle.com/message/9362002#9362002

• ORA-01436: CONNECT loop in the user data

  Hello
  
  I have a simple bit of SQL out details on HR supervisor strings in Oracle EBS:
  

  SELECT     LPAD(' ', (LEVEL - 1) * 10, ' ') || person_id level_label
           , LEVEL
           , description
        FROM applsys.fnd_user u
           , hr.per_all_assignments_f h
       WHERE u.employee_id = h.person_id
  START WITH SYSDATE BETWEEN effective_start_date AND effective_end_date
         AND person_id = :personid
  CONNECT BY PRIOR person_id = supervisor_id
         AND SYSDATE BETWEEN effective_start_date AND effective_end_date

  It will return data normally without problems - e.g. data dummy below - looks very good. The names and made up person_ids.
  

  LEVEL_LABEL                    LEVEL     DESCRIPTION
  000001                         1     Person Person 1
            000002               2     Harry Marry
                      000003          3     John Smith
                                000004     4     Jenna Jones
                                000005     4     Her Name
                                000006     4     His Name
                                000007     4     Joseph Coat
                                000008     4     Les Miserables
                      000009          3     Mister Smith
                      000010          3     Miss Jones
                      000011          3     Andrew And
                                000012     4     Claire So
                                000013     4     Hilary Hi
            000014               2     Jenny Jones
                      000015          3     Amanda Mandy
                                000016     4     James Jim
                                000017     4     William Wonder
                                000018     4     Crazy Cat
                                000019     4     Silly Cat
                                000020     4     Tall Hill
                                000021     4     Amazing Grace
                      000022          3     Lovely Mountain
                                000023     4     Joyous Spring
                                000024     4     Anonymous Name
                                000025     4     Brian Binky

  However, if I try for an another person_id, for which a user receives an error in one part of the Oracle EBS, I get this error:
  
  ORA-01436: CONNECT loop in the user data
  
  I'm guessing there is a loop of supervisor happening somewhere, but I don't know how to determine where it might happen.
  
  I was wondering if there is any way I can change the SQL code to be able to work out where the loop can be, as there are about 50 people involved in Ministry to this user and I have been through all their records and can not see a loop to look through the Oracle HR screens.
  
  I know it's a 'big ask' to ask a vague question about some oracle SQL, so apologies for that.
  
  Any advice much appreciated.
  
  Thank you

  Hello

  To see loops, do something like this:

  SELECT     SYS_CONNECT_BY_PATH (person_id, '/')     AS path
  FROM      applsys.fnd_user           u
  ,      hr.per_all_assignments_f      h
  WHERE      u.employee_id           = h.person_id
  AND     CONNECT_BY_ISCYCLE     = 1
  CONNECT BY NOCYCLE     PRIOR person_id = supervisor_id
       AND           SYSDATE      BETWEEN     effective_start_date
                           AND      effective_end_date
  ;
  

  If you would care to post CREATE TABLE and instructions INSERT for some samples, so I could test it.

  Note there is no START WITH clause.

  If, for example, Jones is the architect of Scott, Scott is the main contractor of Adams and Adams is the architect of Jones (much to other lines is not involved in a loop), then displays 3 rows of output, such as

  PATH
  ---------------------
  Jones/Scott/Adams
  Scott/Adams/Jones
  Adams/Jones/Scott
  

  Moreover, all the same CONNECT BY queries on these tables can be a lot faster if you've made the join and date filtering in a separate subquery first:

  WITH     combined_data     AS
  (
       SELECT     person_id, supervisor_id
       FROM      applsys.fnd_user           u
       ,      hr.per_all_assignments_f      h
       WHERE      u.employee_id      = h.person_id
       AND     SYSDATE      BETWEEN     effective_start_date
                      AND      effective_end_date
  )
  SELECT     SYS_CONNECT_BY_PATH (person_id, '/')     AS path
  FROM     combined_data
  WHERE     CONNECT_BY_ISCYCLE     = 1
  CONNECT BY NOCYCLE     PRIOR person_id = supervisor_id
  ;
  

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  I have a question about the process to authenticate each other between the smart card and the host application.
  
  Basic knowledge
  As far as I understand, use of the host application the KMC to derive the static key, the value of the card and this set of keys, the host application creates the set of session keys. He uses this session defined key to check the cryptogram of the map and generate cryptogram of the host.
  
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  There may be something in the API c# BouncyCastle (I don't do much dotnet so I have not tried) http://www.bouncycastle.org/csharp/

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• ORA-01436: CONNECT loop in the user data, but CONNECT_BY_ISCYCLE is equal to ZERO all the

  Hello
  
  When I run query below, it always throws the below error:

  SELECT connect_by_root code AS code_root,
      CODE,
      CODE_DESC,
      UP_CODE 
    FROM DI_CODE_LEVEL
    WHERE TYPE_CODE='SP'
      CONNECT BY PRIOR CODE=UP_CODE;
  
  ORA-01436: CONNECT BY loop in user data
  01436. 00000 -  "CONNECT BY loop in user data"

  But when I use NOCLYCLE and CONNECT_BY_ISCYCLE to see which line is in question.
  It shows nothing, which means CONNECT_BY_ISCYCLE = ZERO for all rows.

  select * from (
      SELECT connect_by_root code AS code_root,
          CODE,
          CODE_DESC,
          UP_CODE ,
          CONNECT_BY_ISCYCLE AS ISCYCLE
        FROM DI_CODE_LEVEL
        WHERE TYPE_CODE='SP'
          CONNECT BY NOCYCLE PRIOR CODE=UP_CODE
      ) 
  where ISCYCLE>0;

  Is there another reason that sql would lift ORA-01436?
  If there is a loop, then will the combination of NOCYCLE, CONNECT_BY_ISCYCLE will show?
  
  Thank you

  Hello

  Apparently, one or more of the "SP" lines are at the origin of the problem.
  The WHERE clause is applied after the CONNECT BY is finished, saying:

  select * from (
      SELECT connect_by_root code AS code_root,
          CODE,
          CODE_DESC,
          UP_CODE ,
          CONNECT_BY_ISCYCLE AS ISCYCLE
        FROM DI_CODE_LEVEL
        WHERE TYPE_CODE='SP'
          CONNECT BY NOCYCLE PRIOR CODE=UP_CODE
      )
  where ISCYCLE>0;
  

  is equivalent to

  select * from (
      SELECT connect_by_root code AS code_root,
          CODE,
          CODE_DESC,
          UP_CODE ,
          CONNECT_BY_ISCYCLE AS ISCYCLE
        FROM DI_CODE_LEVEL
          CONNECT BY NOCYCLE PRIOR CODE=UP_CODE
      )
  WHERE    TYPE_CODE = 'SP'
  AND     ISCYCLE   > 0;
  

  To see where the loop occurs, you must include the lines where type_code = "SP".

  When you debug "ORA-01436: CONNECT IN a loop in the user data ', view SYS_CONNECT_BY_PATH (uk,...), where the United Kingdom is a unique key. That will tell you much more than just the root information. You might want this:

  SELECT  connect_by_root code                AS code_root,
          CODE,
          CODE_DESC,
          UP_CODE
  ,     SYS_CONNECCT_BY_PATH (code, '/')     AS path          -- For debugging
  ,       CONNECT_BY_ISCYCLE                AS ISCYCLE     -- For debugging
  FROM      DI_CODE_LEVEL
  -- WHERE TYPE_CODE = 'SP'     -- Commented out for debugging
  where      ISCYCLE > 0          -- For debugging
  CONNECT BY NOCYCLE      PRIOR CODE = UP_CODE
  

  I hope that answers your question.
  If not, post a small example data (CREATE TABLE and only relevant columns, INSERT statements), and the results you want from this data.
  Explain how you get these results from these data.
  Always tell what version of Oracle you are using.