The following bug has been logged online:

Bug reference:      3231
Logged by:          Amorn Buchheit
Email address:      [EMAIL PROTECTED]
PostgreSQL version: 7.3.4
Operating system:   Linux
Description:        Duplicate rows primary key bug
Details: 

Duplicate primary key record       
Report Date: April 13, 2007                                                 
                                                
Subject:        Duplicate primary key record                                    
  
                                                        
                                                                            
                                                        
Your name               :       Amorn Buchheit                              
                                                       
Your email address      :       [EMAIL PROTECTED]                            
                                                    
                                                                            
                                                        
                                                                            
                                                        
System Configuration                                                        
                                                        
---------------------                                                       
                                                        
  Server: IBM                                                            
  Operating System: Linux                                                   
                   
  version
-----------------------------------------------------------------
 PostgreSQL 7.3.4 on i386-redhat-linux-gnu, compiled by GCC 2.96

  
There are several tables have two same rows with the same primary key.  Some
tables have a unique index with two same 
value.  This shouldn't happen.          
Has this been reported as a bug in this version?                            
                          
                                                                            
                                                        
                                                                            
                                 
                                Table "public.student_year_rlt"             
                                                                           

     Column     |           Type           |                     Modifiers  
                                                                           

----------------+--------------------------+--------------------------------
--------------------                                                        

 user_id        | integer                  | not null                       
                                                                           

 school_year_id | integer                  | not null default 4             
                                                                           

 grade_level_id | integer                  | not null                       
                                                                           

 year_detail    | character varying(250)   |                                
                                                                           

 school_id      | integer                  | not null default 1             
                                                                           

 status_id      | integer                  | not null default 1             
                                                                           

 created_date   | timestamp with time zone | not null default 'now'         
                                                                           

 last_modified  | timestamp with time zone | default
('now'::text)::timestamp(6) with time zone                                  
                       
Indexes: student_year_rlt_pkey primary key btree (user_id, school_year_id,
school_id)                                                                  
 
Foreign Key constraints: school_id_fk FOREIGN KEY (school_id) REFERENCES
school_info_l(school_id) ON UPDATE NO ACTION ON DELETE NO ACTION,           
   
                         grade_level_id_fk FOREIGN KEY (grade_level_id)
REFERENCES grade_level_l(grade_level_id) ON UPDATE NO ACTION ON DELETE NO
ACTION,
                         status_id_fk FOREIGN KEY (status_id) REFERENCES
status_l(status_id) ON UPDATE NO ACTION ON DELETE NO ACTION,                
   
                         school_year_id_fk FOREIGN KEY (school_year_id)
REFERENCES school_year_l(school_year_id) ON UPDATE NO ACTION ON DELETE NO
ACTION,
                         user_id_fk FOREIGN KEY (user_id) REFERENCES
user_common(user_id) ON UPDATE NO ACTION ON DELETE NO ACTION                
       
Triggers: RI_ConstraintTrigger_5663425,                                     
                                                                           

          RI_ConstraintTrigger_5663426,                                     
                                                                           

          tr_add_school_id,                                                 
                                                                           

          tr_insert_school_id,                                              
                                                                           

          tr_last_modified   

project=# select *  from student_year_rlt where user_id = 792 and
school_year_id = 6;                                         user_id |
school_year_id | grade_level_id | year_detail | school_id | status_id |     
   created_date          |         last_modified
 user_id | school_year_id | grade_level_id | year_detail | school_id |
status_id |         created_date          |         last_modified
---------+----------------+----------------+-------------+-----------+------
-----+-------------------------------+-------------------------------
     792 |              6 |              4 |             |     10437 |      
  1 | 2007-03-08 01:09:17.040851-06 | 2007-04-03 01:09:53.577369-05
     792 |              6 |              4 |             |     10437 |      
  1 | 2007-03-08 01:09:17.040851-06 | 2007-04-03 01:09:53.577369-05
(2 rows)

SELECT oid,xmin,xmax,* FROM student_year_rlt WHERE user_id = 792 and
school_year_id = 6;
project=# SELECT oid,xmin,xmax,* FROM student_year_rlt WHERE user_id = 792
and school_year_id = 6;
   oid   |  xmin   | xmax | user_id | school_year_id | grade_level_id |
year_detail | school_id | status_id |         created_date          |       
 last_modified
---------+---------+------+---------+----------------+----------------+-----
--------+-----------+-----------+-------------------------------+-----------
--------------------
 5664062 | 4311665 |   87 |     792 |              6 |              4 |     
       |     10437 |         1 | 2007-03-08 01:09:17.040851-06 | 2007-04-03
01:09:53.577369-05
 5664062 | 4311665 |   87 |     792 |              6 |              4 |     
       |     10437 |         1 | 2007-03-08 01:09:17.040851-06 | 2007-04-03
01:09:53.577369-05
(2 rows)

project=#
                   Table "public.bm_student_answers"
      Column       |           Type           |       Modifiers
-------------------+--------------------------+------------------------
 bm_publication_id | integer                  | not null
 user_id           | integer                  | not null
 school_id         | integer                  | not null
 bm_question_id    | integer                  | not null
 bm_answer_id      | integer                  |
 correct_answer    | boolean                  | not null default false
 time_answered     | timestamp with time zone | not null default 'now'
 status_id         | integer                  | default 1
 created_date      | timestamp with time zone | default now()
 last_modified     | timestamp with time zone | default now()
Indexes: bm_student_answers_pk primary key btree (bm_publication_id,
user_id, school_id, bm_question_id)
Foreign Key constraints: bm_publication_id_fk FOREIGN KEY
(bm_publication_id) REFERENCES bm_publications(bm_publication_id) ON UPDATE
NO ACTION ON DELETE NO ACTION
Triggers: tr_last_modified,
          tr_time_answered
          
project=#  select * from bm_student_answers where user_id = 101 and
bm_publication_id = 10944 and bm_question_id = 38270 and school_id = 10437;
 bm_publication_id | user_id | school_id | bm_question_id | bm_answer_id |
correct_answer |         time_answered         | status_id |        
created_date          |         last_modified
-------------------+---------+-----------+----------------+--------------+--
--------------+-------------------------------+-----------+-----------------
--------------+-------------------------------
             10944 |     101 |     10437 |          38270 |       154737 | t
             | 2007-04-03 15:34:24.010232-05 |         1 | 2007-04-03
15:34:24.010232-05 | 2007-04-03 15:48:42.263418-05
             10944 |     101 |     10437 |          38270 |       154737 | t
             | 2007-04-03 15:34:24.010232-05 |         1 | 2007-04-03
15:34:24.010232-05 | 2007-04-03 15:48:42.263418-05
(2 rows)

SELECT oid,xmin,xmax,* FROM bm_student_answers WHERE user_id = 101 and
school_id = 10437 and bm_publication_id = 10944
   and bm_question_id = 38270;
   oid   |  xmin   | xmax | bm_publication_id | user_id | school_id |
bm_question_id | bm_answer_id | correct_answer |         time_answered      
  | status_id |         created_date          |         last_modified
---------+---------+------+-------------------+---------+-----------+-------
---------+--------------+----------------+-------------------------------+--
---------+-------------------------------+-------------------------------
 6474066 | 4327254 |    0 |             10944 |     101 |     10437 |       
  38270 |       154737 | t              | 2007-04-03 15:34:24.010232-05 |   
     1 | 2007-04-03 15:34:24.010232-05 | 2007-04-03 15:48:42.263418-05
 6474066 | 4327254 |    0 |             10944 |     101 |     10437 |       
  38270 |       154737 | t              | 2007-04-03 15:34:24.010232-05 |   
     1 | 2007-04-03 15:34:24.010232-05 | 2007-04-03 15:48:42.263418-05
(2 rows)

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