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Informix - Problem description

Problem IT33945 Status: Closed

CRASH IN FOLDVIEWS() ... VIEWINFO() WITH UNION VIEW JOINED TO TABLE
EXPRESSION

product:
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10
Problem description:
A query joining a UNION view to a table expression would fail
with an exception in the optimizer.

It either would return error 874 (general optimizer exception,
indicating exception got handled)
or errors 959/172, indicating the session crashed but could be
suspended
or even "25582: Network connection is broken" if the whole
server crashed.

The assertion stack would contain the following up to the signal
frame:

 viewinfo
 process_view_colltbl_expr
 processview
 foldviews
 sqoptim
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:
The problem doesn't occur when view folding is turned off
(onconfig IFX_FOLDVIEW 0).
Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
19.08.2020
25.01.2021
25.01.2021
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
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