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Informix - Problem description

Problem IT36187 Status: Closed

SERVER ASSERT FAIL IN VALSTORE_DEEPCOPY FROM QUERY USING UNION AND CONCAT
OF CHARACTER FIELDS > 215 AND OTHER FIXED TYPES

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
The following SQL reproduces the problem:

create temp table p
(
pa1_name char(60) not null
);
insert into p values ("NAME");

  select
                 pa1_name ||

'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' ||

'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' ||

'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' ||

                 'aaaaaa' || 1 from p

 union

 select
        " " as Description
from p
;

However the problem will only reproduce if the 0x1000 flag is
NOT present in SQL_FEAT_CTRL2 (this flag is present by default)

The stack from the asserting thread is as follows:

afstack
mt_ex_throw_sig
afsig_handler

valstore_deepcopy
merge_next
sort_open
prepselect
open_cursor
sq_open
sqmain
spawn_thread
th_init_initgls
startup
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC6.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC15 (when available) or    *
* 14.10.xC6 (when available).                                  *
****************************************************************
Local Fix:
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC6.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC15 (when available) or    *
* 14.10.xC6 (when available).                                  *
****************************************************************
Comment
Fixed in Informix Server 12.10.xC15 and 14.10.xC6.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
11.03.2021
12.05.2021
12.05.2021
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)