|
Problem IC65953
|
Status: Closed |
RECURSIVE QUERY WITHOUT INITIALIZATION FULLSELECT HANGS DURING COMPILATION |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
A recursive query that is missing the initialization full select
hangs during compilation. Here is an example of such a query:
with tab (col) as (select 'const' from tab) select * from tab
Because there is no initialization full select, the query would
never return any rows. This is a badly written query where the
intention was either:
a) a recursive query but the initialization full select was
merely neglected
b) that the table reference 'tab' in the the common table
expression full select is a real table. In this case, the table
references must be changed or qualified to avoid confusion,
e.g.:
with A.tab (col) as (select 'const' from B.tab) select *
from A.tab |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Recursive query *
****************************************************************
* PROBLEM DESCRIPTION: *
* A recursive query that is missing the initialization full *
* select hangs during compilation. *
* Here is an example of such a query: *
* *
* with tab (col) as (select 'const' from tab) select * from *
* tab *
* *
* Because there is no initialization full select, the query *
* would never return any rows. This is a badly written query *
* where the intention was either: *
* *
* a) a recursive query but the initialization full select was *
* merely neglected *
* b) that the table reference 'tab' in the the common table *
* expression full select is a real table. In this case, the *
* table references must be changed or qualified to avoid *
* confusion, e.g.: *
* *
* with A.tab (col) as (select 'const' from B.tab) select * *
* *
* from A.tab *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 9.5 Fix Pack 6 or later *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
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 |
First fixed in DB2 version 9.5 Fix Pack 6 |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC65954 IC65955
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 29.01.2010
17.03.2010
17.03.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
