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Problem IT36937
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Status: Closed |
IF ROW BEING SORTED IS VERY WIDE MEMORY OVERWRITES OR WRONG RESULTS ARE POSSIBLE.
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| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
IF SORT IS DONE IN ROWSTORE LOGIC, NOT UNDER CTQ (COLUMNAR
LOGIC) AND ROW GOING THROUGH SORT IS VERY WIDE:
length of all fixed length columns + (number of variable length
columns)*4 or 5 (depending on null-ability) is wider than 65535,
then it is possible that during sort we will overwrite memory
and
cause traps or SQL0901 errors or wrong results.
Examples of stacks for a trap:
6 __intel_ssse3_rep_memcpy
7 sqlsUnformatRow
8 sqlsfetc
9 sqlriFetch
10 sqlrita
11 sqlriSectInvoke
12 sqlrr_process_fetch_request
9 sqle_panic
10 sqldValidateData
11 sqldValFromFixed
12 sqldExtractZvalFromRec
13 sqldEvalDataPred
14 sqlsEvalPred
15 sqlsfetc |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.5.6 or later *
**************************************************************** |
| Local Fix: |
|
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 11.5.6 or later *
**************************************************************** |
| Comment |
Upgrade to 11.5.6 or later |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 18.05.2021
21.06.2021
23.06.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
