December 2002
Intermediate to advanced
292 pages
6h 6m
English
Content preview from DB2 Recovery Expert for Multiplatforms
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Chapter 5. Log analysis 83
Full support for LOBs (defined with the LOGGED attribute) will be added in a
future release of DB2 Recovery Expert. If the LOB is defined as NOT LOGGED,
there is no LOB data on the log. In that case, there is not much that DB2 RE can
do.
5.6.5 What if the table has changed?
If the table has changed since the period for which Undo or Redo SQL was
produced, then the results of running the Undo or Redo SQL are indeterminate.
This can be illustrated by a simple example:
What if, after DEMOAPP was run, several hours passed before the user who ran
DEMOAPP realized that the changes to the EMPLOYEE table were incorrect.
During that time, a user had run following the SQL statement:
update employee set workdept='A05' where workdept='A ...
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