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DB2 - Problem description

Problem IC94836 Status: Closed

With Currently committed semantics disabled a statement may incorrectly
fail with SQL0901N ( REASON "IMPROPER LOCKING" )

product:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problem description:
With currently committed semantics disabled (CUR_COMMIT=DISABLED 
in the database configuration), for specific access plans 
(related to predicate pushdown), a statement may fail to compile 
with the following error message: 
 
SQL0901N  The SQL statement or command failed because of a 
database system error. (Reason "Improper locking".) 
SQLSTATE=5800 
 
The db2diag.log will show: 
 
2013-08-13-02.50.31.077507-240 I4695A873            LEVEL:Severe 
PID     : 26869962             TID : 2315           PROC 
:db2sysc 
INSTANCE: db2inst1               NODE : 000           DB 
:SAMPLE 
APPHDL  : 0-7 
APPID:*LOCAL.db2inst1.130813064915 
AUTHID  : db2inst1               HOSTNAME: db2debug 
EDUID   : 2315                 EDUNAME: db2agent (SAMPLE) 
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: 16 
 sqlerrmc: Improper locking 
 sqlerrp : SQLNG22B 
 sqlerrd : (1) 0x00000000      (2) 0x00000000      (3)0x00000000 
           (4) 0x000082CC      (5) 0xFFFFFC6E      (6)0x00000000 
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6) 
           (7)      (8)      (9)      (10)        (11) 
 sqlstate: 
 
As part of the error, a FODC_AppErr_<timestamp> subdirectory is 
generated in the DIAGPATH with the top function in the stack 
trace : 
 
sqlngPushdownCB::generate 
sqlng_build_thread 
sqlng_build_TA_op 
sqlng_process_f_iscan 
sqlng_process_fetch_op 
sqlngProcessLolepop
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* CUR_COMMIT=DISABLED                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.1 and Fix Pack 4                   * 
****************************************************************
Local Fix:
Enable currently committed semantics (CUR_COMMIT=ON)
available fix packs:
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows

Solution
Problem was first fixed in DB2 Version 10.1 and Fix Pack 4
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC96975 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
13.08.2013
02.06.2014
02.06.2014
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
10.1.0.4 FixList