Issue in Hierachichal Query

Question

HI All,
I am having a issue related to the hierachal query execution in oracle 10g versions. Could any one help me with this issue?
1) When executes the following query I can observe a result set like this *(ORACLE instance is -10.2.0.4)*
70, 70-->71 ,70->71->72, 70->71->72->73, 72, 72->73
SELECT *
FROM
SELECT dp.contract contract,
CONNECT_BY_ROOT dp.catalog_no root_catalog_no,
sys_connect_by_path(dp.catalog_no, '^') part_path,
dp.catalog_no catalog_no,
dp.valid_from valid_from,
dp.valid_to valid_to
FROM c_distribution_part_tab dp
START WITH dp.replaced_part_no IS NULL
CONNECT BY PRIOR dp.catalog_no = dp.replaced_part_no
AND PRIOR dp.contract = dp.contract
AND PRIOR dp.valid_from >= dp.valid_from
AND PRIOR dp.valid_to <= dp.valid_to
WHERE root_catalog_no LIKE '7_'
ORDER BY part_path,
valid_from,
valid_to;
2) But when this same query executes in the ORACLE 10.2.0.3 one line is missing in the result set (70->71->72->73, is missing)
70, 70->71,70->71->72, 72,72->73
3) BUT if I create a copy in that db version 10.2.0.3 from the same table (CREATE TABLE c_distribution_part_tab_copy AS SELECT * FROM c_distribution_part_tab; ) and executing the above query replacing the c_distribution_part_tab with c_distribution_part_tab_copy I am getting the result set correct.With out no issue.
4) Also if I change the where condition from
AND PRIOR dp.valid_from >= dp.valid_from
AND PRIOR dp.valid_to <= dp.valid_to
to
AND PRIOR dp.valid_from = dp.valid_from
AND PRIOR dp.valid_to = dp.valid_to
I am getting the correct result set event with the original table c_distribution_part_tab.
5) DATA set is identical in both ORACLE versions.
6) DATA set
contract catalog_no replaced_part-no valid_from valid_to
1 70 null 2011-1-1 2011-12-31
1 71 70 2011-1-1 2011-12-31
1 72 71 2011-1-1 2011-12-31
1 72 null 2010-1-1 2010-12-31
1 73 72 2010-1-1 2010-12-31
1 73 72 2011-1-1 2011-12-31
Thanks in advance if can give me any idea.
Thilini
Edited by: 845728 on Mar 19, 2011 8:34 AM
Edited by: 845728 on Mar 19, 2011 8:36 AM

Answer 1

Working for me on 10.2.0.3
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE    10.2.0.3.0      Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
SQL>   SELECT *
  2      FROM (    SELECT dp.contract contract
  3                      ,CONNECT_BY_ROOT dp.catalog_no root_catalog_no
  4                      ,SYS_CONNECT_BY_PATH (dp.catalog_no, '^') part_path
  5                      ,dp.catalog_no catalog_no
  6                      ,dp.valid_from valid_from
  7                      ,dp.valid_to valid_to
  8                  FROM c_distribution_part_tab dp
  9            START WITH dp.replaced_part_no IS NULL
10            CONNECT BY     PRIOR dp.catalog_no = dp.replaced_part_no
11                       AND PRIOR dp.contract = dp.contract
12                       AND PRIOR dp.valid_from >= dp.valid_from
13                       AND PRIOR dp.valid_to <= dp.valid_to)
14     WHERE root_catalog_no LIKE '7%'
15  ORDER BY part_path, valid_from, valid_to;
  CONTRACT ROOT_CATALOG_NO PART_PATH                                                                           
         1              70 ^70                                                                                 
         1              70 ^70^71                                                                              
         1              70 ^70^71^72                                                                           
         1              70 ^70^71^72^73                                                                        
         1              72 ^72                                                                                 
         1              72 ^72^73                                                                              
6 rows selected.
SQL> G.