|
Problem IT03676
|
Status: Closed |
A QUERY MAY HIT -901 ERROR WHEN IT CONTAINS PREDICATE COL=NULL |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
When a query has local equality predicate on a simple column
"tab1.colX = NULL" as well as equality predicate "tab1.colX =
tab2.colY" where tab1 and tab2 are two different tables or
quantifiers, the query compilation may return -901 error
"invalid qnc assignment" and the following compiler error stack
can be found in db2diag.log:
sqlnr_splitswbox[60]
sqlnq_qtb::box_opr_split[116]
sqlnq_pid::update_qnc[100]
sqlnq_pid::replace_qnc[100]
Note in Oracle compatibility mode "COL=''" is also transformed
to "COL=NULL". |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version 9.7 Fix Pack 10. *
**************************************************************** |
| Local Fix: |
Replace "COL=NULL" or "COL=''" in ORA compatibility
mode to an always false predicate "1=0" in the query SQL
statement. |
| Solution |
First fixed in Version 9.7 Fix Pack 10. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 10.08.2014
17.11.2014
17.11.2014 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.FP10
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.10
|
 |
