|
Problem IT34311
|
Status: Closed |
Query with alias for complex column used in group by clause traps and generates FODC
|
| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
FODC with stack similar to:
x0000101B30FDCC80 0x000010000834D020
_Z20sqlng_build_COLD_objP9sqlng_blkP9sqlno_qtbP9sqlnq_qtbP17sqln
o_order_classjP13sqlng_columnshPP10SQLD_FIELDPb + 0x0920
( = offset 0x80AD020 in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDCE20 0x000010000845121C
_Z22sqlng_build_rev_TQB_opP9sqlng_blkP19sqlno_plan_operator +
0x01bc
( = offset 0x81B121C in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDCF40 0x00001000084537CC
_Z19sqlng_process_tq_opP9sqlng_blkP19sqlno_plan_operator +
0x082c
( = offset 0x81B37CC in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDD070 0x00001000083348E4
_Z19sqlngProcessLolepopP9sqlng_blkP19sqlno_plan_operator +
0x00d4
( = offset 0x80948E4 in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDD0F0 0x00001000083BC4F0
_Z21sqlng_process_sort_opP9sqlng_blkP19sqlno_plan_operator +
0x0310
( = offset 0x811C4F0 in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDD690 0x00001000083348E4
_Z19sqlngProcessLolepopP9sqlng_blkP19sqlno_plan_operator +
0x00d4
( = offset 0x80948E4 in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDD710 0x000010000831E62C
_Z18sqlng_build_threadP9sqlng_blkP14sqlng_thd_ctrlP9sqlnq_qun +
0x1a0c
( = offset 0x807E62C in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x0000101B30FDD8D0 0x00001000083B1FC4
_Z24sqlng_scan_derived_tableP9sqlng_blkP19sqlno_plan_operatorhP9
sqlnq_qun + 0x03d4
( = offset 0x8111FC4 in
/head/home/db2inst1/sqllib/lib64/libdb2e.so.1
can affect certain queries:
- NPS compatibility is enabled
- query contains GROUP BY
- alias is used for complex expression referencing the same
column multiple times
- mentioned alias is used in WHERE and GROUP BY clauses |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* DB2 LUW USERS *
****************************************************************
* PROBLEM DESCRIPTION: *
* Failure as follows: *
* SQL0901N The SQL statement or command failed because of *
* a database system error. (Reason "Found zero CLOB.reset".) *
* can affect certain queries: *
* ? NPS compatibility is enabled *
* ? query contains GROUP BY *
* ? alias is used for complex expression referencing the same *
* column multiple times *
* ? mentioned alias is used in WHERE and GROUP BY clauses *
****************************************************************
* RECOMMENDATION: *
* Will be fixed in future fixpacks *
**************************************************************** |
| Local Fix: |
Local fix:
Rewrite the query by replacing the alias in WHERE clause by
complex expression |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* DB2 LUW USERS *
****************************************************************
* PROBLEM DESCRIPTION: *
* Failure as follows: *
* SQL0901N The SQL statement or command failed because of *
* a database system error. (Reason "Found zero CLOB.reset".) *
* can affect certain queries: *
* ? NPS compatibility is enabled *
* ? query contains GROUP BY *
* ? alias is used for complex expression referencing the same *
* column multiple times *
* ? mentioned alias is used in WHERE and GROUP BY clauses *
****************************************************************
* RECOMMENDATION: *
* Will be fixed in future fixpacks *
**************************************************************** |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 22.09.2020
09.04.2021
09.04.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
