|
Problem IC76410
|
Status: Closed |
QUERY MAY FAIL WITH A -901 WHEN OPTIMIZER TRIES TO MERGE MULTIPLE UNION OPERATORS |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
A query may fail with a -901 under the following conditions:
1. There are multiple UNION operators at different level of
query.
2. One of the UNION operators has 3 or more duplicate branches,
i.e. branches having exactly same set of tables, views, join and
local predicates.
An associated trap file may have below StackTrace:
---
-------Frame------ ------Function + Offset------
0x09000000008CF470 pthread_kill + 0xB0
0x09000000044A0F88 sqloDumpEDU + 0x74
0x09000000044A1E4C sqldDumpContext__FP8sqeAgentiN42PCcPvT2 +
0x11C
0x09000000044A1C64
sqldDumpContext__FP8sqeAgentiN42PCcPvT2@glueABB + 0x94
0x09000000047D3E8C sqlrr_dump_ffdc__FP8sqlrr_cbiT2 + 0x350
0x0900000003C7420C sqlzeDumpFFDC__FP8sqeAgentUiP5sqlcai + 0x24
0x0900000003C73FB8 sqlzeSqlCode__FP8sqeAgentUiUlT2P5sqlcaiUsPc +
0x120
0x0900000003C73CCC sqlnn_erds__FiN41e + 0x124
0x0900000005148BB0 sqlnn_erds__FiN41e@glue611 + 0xB4
0x09000000047EA08C
prd_pulldown__9sqlnq_qunFPP9sqlnq_pidPFP9sqlnq_qncPiPP9sqlnq_pid
T2_iPi
+ 0xE8
0x09000000060B056C sqlnr_sop_fix_hxp__FP9sqlnq_oprPiCP3loc +
0x58C
0x09000000060A77D4 sqlnr_optprep__FP9sqlnq_qur + 0x1040
0x09000000060A66E4
sqlnr_optprep_action__FP10sqlnr_qrwaPiP14sqlnr_progress + 0x10
0x0900000004AE4BF0
sqlnr_comp__FPiiP16sqlnr_rule_stateP10sqlnr_qrwaP14sqlnr_progres
s@AF191_165
+ 0x170
0x0900000004AE2388
sqlnr_comp__FPiiP16sqlnr_rule_stateP10sqlnr_qrwaP14sqlnr_progres
s
+ 0x44
0x0900000004AE21AC
sqlnr_seq__FPiP10sqlnr_qrwaP14sqlnr_progressP12sqlnr_rclass +
0xBC
0x09000000060F3740 sqlnr_rcc__FiP10sqlnr_qrwaPiP14sqlnr_progress
+ 0x178
0x0900000006508A5C sqlnr_exe__FP9sqlnq_qur + 0x10E4
0x090000000652E69C sqlnr_exe__FP9sqlnq_qur@glue113A + 0x70
0x09000000035ADC50
sqlnn_cmpl__FP8sqeAgentP11sqlrrstrings17sqlnn_compileModeT3P14sq
lrr_cmpl_enviT7PP9sqlnq_qur
+ 0x2294
0x0900000003C63800
sqlnn_cmpl__FP8sqeAgentP11sqlrrstrings17sqlnn_compileModeT3P14sq
lrr_cmpl_env
+ 0x24
0x0900000003C095C4
sqlra_compile_var__FP8sqlrr_cbP14sqlra_cmpl_envPUciUsN54P16sqlra
_cached_varPiPUl
+ 0x610
0x0900000003C08240
sqlra_find_var__FP8sqlrr_cbP17sqlra_cached_stmt13sqlra_stmt_idUi
T4PUcT4UsUcP14sqlra_cmpl_enviPiT11_T12_N311_T12_P14SQLP_LOCK_INF
OPP16sqlra_cached_varT12_PUlb
+ 0x404
0x0900000003C07CAC sqlra_get_var__FP8sqlrr_cbiT2bPbT5 + 0x444
0x09000000040B7728
sqlrr_prepare__FP14db2UCinterfaceP16db2UCprepareInfo + 0x138
0x0900000003B71FF8
sqljs_ddm_prpsqlstt__FP14db2UCinterfaceP13sqljDDMObject + 0xAF0
0x09000000036A2EB4
sqljsParseRdbAccessed__FP13sqljsDrdaAsCbP13sqljDDMObjectP14db2UC
interface
+ 0x10C
0x0900000003D0ADE0
sqljsParse__FP13sqljsDrdaAsCbP14db2UCinterface - 0x124
0x0900000003D0C730 @63@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb
+ 0x1D8
0x0900000003E8A558
@63@sqljsDriveRequests__FP8sqeAgentP14db2UCconHandle + 0x98
0x0900000003E8A3C8
@63@sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0xE0
0x0900000003E8A13C sqljsDrdaAsDriver__FP18SQLCC_INITSTRUCT_T +
0xD8
0x0900000003E8BE00 RunEDU__8sqeAgentFv + 0x11C
0x0900000003E96748 EDUDriver__9sqzEDUObjFv + 0x78
0x0900000003E23550 sqloEDUEntry + 0x57C
---
Db2diag.log may have below associated message:
---
2011-04-25-13.57.43.493681+540 I13726A871 LEVEL: Severe
PID : 860292 TID : 62836 PROC : db2sysc
0
INSTANCE: db2inst1 NODE : 000 DB : DB2
APPHDL : 0-22222 APPID: 192.168.1.168.110425050011
AUTHID : DB2INST1
EDUID : 62836 EDUNAME: db2agent (DB050005) 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: 42
sqlerrmc: Pulldown attempted on a column with no hxp
sqlerrp : SQLNQ0A1
sqlerrd : (1) 0x00000000 (2) 0x00000000 (3)
0x00000000
(4) 0x00000000 (5) 0xFFFFFFF6 (6)
0x00000000
sqlwarn : (1) (2) (3) (4) (5) (6)
(7) (8) (9) (10) (11)
sqlstate:
2011-04-25-13.57.43.505683+540 I14598A218 LEVEL: Severe
PID:860292 TID:62836 NODE:000 Title: SQLCA
Dump File:/home/db2inst1/db2dump/FODC_AppErr_....
--- |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* DB2 UDB Version 9.5. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error description field for more information. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Version 9.5 FixPack 9. *
**************************************************************** |
| Local Fix: |
Not available. |
| available fix packs: |
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
Problem was first fixed in DB2 UDB Version 9.5 FixPack 9. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC76434
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 15.05.2011
08.03.2012
08.03.2012 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP9
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.5.0.9
|
 |
