|
Problem IT33537
|
Status: Closed |
UNEXPECTED INTERNAL ERROR 172 RUNNING MERGE STATEMENT USING SUBQUERIES
|
| product: |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 |
| Problem description: |
A MERGE statement involving multiple subqueries may fail with
error 959 / 172 when a join condition exists that connects the
two subqueries.
An example statement:
MERGE INTO target t USING
( SELECT mnum, cref FROM source ) x
ON t.num = x.mnum
WHEN MATCHED THEN UPDATE
SET code =
(SELECT code FROM ref WHERE cref = x.cref);
An Assert Failure is generated which includes a thread stack
similar to:
ld_newvals_in2tmpbuf
subqcache_find
chkrmk
exsubq
ev_cb
new_eval
eval_projection_list
dodmlrow
process_upsert
upsert_next
doupsert
excommand
sq_execute
sqmain |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 12.10.xC15 (when available) or *
* 14.10.xC5. *
**************************************************************** |
| Local Fix: |
a workaround can be using a view for the target table:
create view vt as (select num, code from target);
merge into vt t using
... |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 12.10.xC15 (when available) or *
* 14.10.xC5. *
**************************************************************** |
| Comment |
Fixed in Informix Server 12.10.xC15 and 14.10.xC5. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 14.07.2020
18.01.2021
18.01.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
