DB2 - Problem description
| Problem IT11990 | Status: Closed |
QUERY COMPILATION MAY FAIL WITH: -901 SQLNO_GET_BEST_PLAN[200] WHEN ZIGZAG JOIN (ZZJN) IS CONSIDERED | |
| product: | |
DB2 FOR LUW / DB2FORLUW / A50 - 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 10.5 Fix Pack 7. * **************************************************************** | |
| Local Fix: | |
disable ZigZag joins by setting the following keyword db2set DB2_REDUCED_OPTIMIZATION='ZZJN OFF' | |
| Solution | |
First fixed in DB2 Version 10.5 Fix Pack 7. | |
| Workaround | |
not known / see Local fix | |
| Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 27.10.2015 20.01.2016 20.01.2016 |
| Problem solved at the following versions (IBM BugInfos) | |
| Problem solved according to the fixlist(s) of the following version(s) | |
| 10.5.0.7 |
|