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Add ability to invalidate single plan without flushing entire package cache
I would like the ability to invalidate/flush access plans and performance data for a specific statement from the package cache. It seems like the EXECUTABLE_ID would allow us to uniquely identify an access plan for this purpose.Flushing the entire...
Optimizer should ignore RTRIM when calculation filter factor
When the optimizer calculates the filter factor for a predicate which uses RTRIM, it just returns the default value. (0.04)It should ignore the RTRIM and use the COLCARD of the column stats instead.Refer to Case: TS001114316
Ubuntu 16.04 LTS has End of life as April 2021. We use IBM DB2 11.1.4 Enterprise Edition on Ubuntu 16.04 LTS for our MDM instances which is not compatible with the higher versions of Ubuntu -18.04 LTS and above. Same is true for the updated versi...
Knowledge center should load content of previous and next articles automatically
When navigating the Knowledge Center, it is necessary to click on the left panel every single article. Some of them are very short to read, and it takes a lot of time to reload the whole page just for a single article.It would be easy if by clicki...
When issuing a sentence like:
db2 drop audit policy SELECT_ALL_TABLES
The returned error message does not include the schema of the problematic object:
SQL0478N The statement failed because one or more dependencies exist on thetarget object....
Hi,Currently db2ReadLog api gives us the record based on LRI values. We need to pass LRI range(start LRI and end LRI) to the api to get db2 records.There is no other way to get the records using the api.It would be good, if we can query the logs ...
Latch information and more internals information for performance analysis
Detailed information about LATCH to DBA. More information of wait events would be good too like if a statement is waiting for a sequential read, how much the transaction is spending on network time , block concurrency, and so on.
Reproduce Scenario and found to be a expected behavior while CTAS locks syscat.tablessession 1 > create table Table1 as (select * from Table_2 ) with data;session 2, query tool > select * from syscat.tables; --> lock waiting
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