Informix - Problem description
Problem IT37233 | Status: Closed |
ROLLBACK OF A PAGE ALTER POTENTIALLY CORRUPTING THE PAGE'S SLOT TABLE IF VARCHAR CHANGE INVOLVED | |
product: | |
INFORMIX SERVER / 5725A3900 / E10 - | |
Problem description: | |
With in-place alters, a table can contain data pages containing old version rows. Eventually, e.g. upon updating one of those old version rows, the containing page and all its rows would be altered to the latest schema version. If the in-place alter history between such page's version and the current version includes a varchar length change and such page alter happens to occur in a transaction that, for some reason, later gets rolled back, the page potentially will be left in a corrupted state, with part of its slot table overwritten. The corruption will not be detected until next access to any row on this page, so an assertion might occur only long after the fact. The problem is more likely with MAX_FILL_DATA_PAGES on, so if pages can be very full with variable length columns. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC16 and 14.10.xC7. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC16 or 14.10.xC7. * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC16 and 14.10.xC7. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC16 or 14.10.xC7. * **************************************************************** | |
Comment | |
Fixed in Informix Server 12.10.xC16 and 14.10.xC7. | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 11.06.2021 17.05.2023 17.05.2023 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |