home clear 64x64
en blue 200x116 de orange 200x116 info letter User
suche 36x36
Latest versionsfixlist
11.1.0.7 FixList
10.5.0.9 FixList
10.1.0.6 FixList
9.8.0.5 FixList
9.7.0.11 FixList
9.5.0.10 FixList
9.1.0.12 FixList
Have problems? - contact us.
Register for free anmeldung-x26
Contact form kontakt-x26

DB2 - Problem description

Problem IT07925 Status: Closed

QUERY COMPILATION MAY FAIL WITH: -901 SQLNO_GET_BEST_PLAN[200] WHEN ZIGZAG
JOIN (ZZJN) IS CONSIDERED

product:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problem description:
A query compilation might fail with SQL0901N ( 
sqlno_get_best_plan) if a ZigZag join is considered. 
 
FODC_AppErr data is written and the following can be seen in 
db2diag.log: 
 
2015-03-02-12.38.45.394532+060 I142140A919          LEVEL: 
Severe 
PID     : 10354794             TID : 263679         PROC : 
db2sysc 0 
INSTANCE: db2inst1             NODE : 000           DB   : 
SAMPLE 
APPHDL  : 0-25631              APPID: 
199.99.66.94.36392.150302113429 
AUTHID  : USER12               HOSTNAME: myhost 
EDUID   : 263679               EDUNAME: db2agent (SAMPLE) 0 
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: 58 
 sqlerrmc: sqlno_get_best_plan       [200]:rc(     0) 
 sqlerrp : SQLNN067 
 sqlerrd : (1) 0x803100AF      (2) 0x000000AF      (3) 
0x00000000 
           (4) 0x00000000      (5) 0xFFFFFDA8      (6) 
0x00000000 
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6) 
           (7)      (8)      (9)      (10)        (11) 
 
2015-03-02-12.38.53.068015+060 E202409A2288         LEVEL: Info 
(Origin) 
PID     : 10354794             TID : 263679         PROC : 
db2sysc 0 
INSTANCE: db2inst1             NODE : 000           DB   : 
SAMPLE 
APPHDL  : 0-25631              APPID: 
199.99.66.94.36392.150302113429 
AUTHID  : USER12               HOSTNAME: myhost 
EDUID   : 263679               EDUNAME: db2agent (SAMPLE) 0 
FUNCTION: DB2 UDB, SW- common services, sqlnn_cmpl, probe:650 
MESSAGE : ZRC=0x803100AF=-2144272209=SQLNN_E_BADNEWS 
          "unexpected error but state is OK" 
DATA #1 : String, 62 bytes 
An unexpected error was detected during statement compilation. 
DATA #2 : Boolean, 1 bytes 
false 
DATA #3 : Boolean, 1 bytes 
false 
DATA #4 : Boolean, 1 bytes 
true 
DATA #5 : Boolean, 1 bytes 
false 
DATA #6 : Hex integer, 4 bytes 
0x00000000 
DATA #7 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes 
 sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -901   sqlerrml: 58 
 sqlerrmc: sqlno_get_best_plan       [200]:rc(     0) 
 sqlerrp : SQLNN067 
 sqlerrd : (1) 0x803100AF      (2) 0x000000AF      (3) 
0x00000000 
           (4) 0x00000000      (5) 0xFFFFFDA8      (6) 
0x00000000 
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6) 
           (7)      (8)      (9)      (10)        (11) 
 sqlstate: 
DATA #8 : Hex integer, 4 bytes 
0x00000040 
DATA #9 : String with size, 451 bytes 
SELECT ... 
DATA #10: String, 445 bytes 
Compiler error stack for rc = -2144272209: 
sqlnn_cmpl[380] 
sqlno_exe[900] 
sqlno_planning_phase[200] 
sqlno_planning_scan[400] 
sqlno_scan_utils_qgm[200] 
sqlno_each_qur[400] 
sqlno_top_qtb[100] 
sqlno_each_opr[200] 
sqlno_walk_qun[100] 
sqlno_each_opr[1200] 
sqlno_plan_end_opr[100] 
sqlno_gen_partitions_for_Q[300] 
sqlno_open_part[410] 
sqlno_generate_zzjn_plans[40] 
sqlno_generate_single_fact[80] 
sqlno_zzjn_generate_snowfl[10] 
sqlno_get_best_plan[200] 
...
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Problem Description above.                               * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.1 Fix Pack 5.                      * 
****************************************************************
Local Fix:
disable ZigZag joins by setting the following keyword 
db2set DB2_REDUCED_OPTIMIZATION='ZZJN OFF'
Solution
First fixed in DB2 Version 10.1 Fix Pack 5.
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
25.03.2015
15.07.2015
15.07.2015
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
10.1.0.5 FixList