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Today, when our ETL jobs scan large amounts of data from a table with out using RS/RR isolation levels under certain conditions they see duplicate data and/or missing data. This could be caused due to the fact that rows that were already scanned c...
Lock access plan for a query. Prevent the optimizer from changing a plan, once a "good" plan has been determined.
We see cases where a large query runs fine, and something changes the stats, which causes the optimizer to choose a really bad plan. We would like to be able to lock an individual query, and tell the optimizer: "Just use this plan".
Add description of views and columns of SYSCAT schema directly into SYSCAT
Good morning, may I ask You, if it is possible to add comments (SQL comand COMMENT ON ...) into SYSCAT schema views and their columns in future versions of Db2? I mean some extract of documentation ended by HTTP link to the appropriate web documen...
Enhance IBM My Notifications with Affected DB2 Version Information
Currently we subscribe to the IBM 'My Notifications' email (see: https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.trb.doc/doc/t0060379.html or https://www-01.ibm.com/support/docview.wss?uid=swg21686621) so we rece...
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 versio...
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