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DB2 - Problem description

Problem IC79679 Status: Closed

QUERY REFERENCING A TABLE CONTAINING A GENERATED COLUMN MIGHT PRODUCE A
-901

product:
DB2 FOR LUW / DB2FORLUW / 970 - DB2
Problem description:
Under rare scenarios, DB2 might produce a SQL0901N if the 
following conditions are true: 
1. The query references a table with one or more generated 
columns 
2. The same table is part of one or more MQTs 
3. The generated column(s) are not referenced in the MQT 
 
In the db2diag.log, the issue appears as 
 
2011-08-22-14.59.17.413828-240 I107409736E862      LEVEL: Severe 
PID     : 25891                TID  : 192766011744 PROC : 
db2sysc 1 
INSTANCE: nypxt280             NODE : 001          DB   : IMRSDM 
APPHDL  : 1-5889               APPID: 
10.184.115.183.24068.1108221859 
AUTHID  : IMRSDB 
EDUID   : 93402                EDUNAME: db2agent (IMRSDM) 1 
FUNCTION: DB2 UDB, relation data serv, sqlrr_dump_ffdc, 
probe:300 
DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes 
 sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -901   sqlerrml: 30 
 sqlerrmc: Bad Plan; Unresolved QNC found 
 sqlerrp : SQLNG032 
 sqlerrd : (1) 0x00000000      (2) 0x00000000      (3) 
0x00000000 
           (4) 0x000000B9      (5) 0xFFFFFC1E      (6) 
0x00000001 
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6) 
           (7)      (8)      (9)      (10)        (11) 
 sqlstate: 
 
 
<dumping into FODC> 
 
2011-08-22-14.59.17.659189-240 E107459750E1259     LEVEL: Info 
(Origin) 
PID     : 25891                TID  : 192766011744 PROC : 
db2sysc 1 
INSTANCE: nypxt280             NODE : 001          DB   : IMRSDM 
APPHDL  : 1-5889               APPID: 
10.184.115.183.24068.1108221859 
AUTHID  : IMRSDB 
EDUID   : 93402                EDUNAME: db2agent (IMRSDM) 1 
FUNCTION: DB2 UDB, SW- common services, sqlnn_cmpl, probe:650 
MESSAGE : ZRC=0x801A006D=-2145779603=SQLZ_CA_BUILT 
          "SQLCA has already been built" 
DATA #1 : String, 723 bytes 
Compiler error stack for rc = -2145779603: 
sqlnn_cmpl[420] 
sqlng_main[2790] 
sqlng_main[1656] 
sqlng_build_thread[10] 
sqlng_process_return_op[50] 
sqlng_process_pipe_op[30] 
sqlng_process_mate_op[1735] 
sqlng_process_TQ_op[30] 
sqlng_build_thread[40] 
sqlng_scan_derived_table[40] 
sqlng_build_thread[10] 
sqlng_process_sort_op[20] 
sqlng_process_nljn_op[50] 
sqlng_build_thread[10] 
sqlng_process_hsjn_op[60] 
sqlng_build_thread[10] 
sqlng_process_nljn_op[50] 
sqlng_build_thread[10] 
sqlng_process_TQ_op[30] 
sqlng_build_thread[40] 
sqlng_process_nljn_op[140] 
sqlng_build_thread[10] 
sqlng_process_f_iscan[110] 
sqlng_build_TA_op[110] 
sqlng_build_thread[100] 
sqlng_walk_BF_chain[25] 
sqlng_process_BF_node[20] 
sqlng_process_parse_tree_n[994] 
 
<followed by ADM5570W>
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 V9.7 Fixpack 6                                * 
****************************************************************
Local Fix:
Create another MQT which references the generated column in the 
select list.
available fix packs:
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows

Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
08.11.2011
20.07.2012
20.07.2012
Problem solved at the following versions (IBM BugInfos)
9.7.FP6
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.6 FixList