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DB2 does not identify the tables as collocated even though they exist on the same set of db partitions because they reside in different database partition groups. The optimizer doesn't always make a good choice when comparing plans in DPF. With th...
VARCHAR_FORMAT/TO_CHAR function does not support timestamp formatting using brackets(RIMS)
PMR 28054,020,649 Customer is moving from Oracle to DB2 and under their Oracle applications they are using the TO_CHAR function. That function works in DB2 under the name of VARCHAR_FORMAT or TO_CHAR. The following TO_CHAR function is not working ...
new optimizer guideline to break CSE for a specific query or as a global guideline(RIMS)
Customer encountered scenario where use of CSE resulted in degradation in query performance (details below). This requirement is to implement a new optimizer guideline that will allow customer to break CSE for a specific query or as a global guide...
Calisto suggested if the MOD function FF issue is pervasive in the customer's environment, we could do an enhancement(under regvar maybe), so please ask for it. I will ask Satya to collect the stats across the partitions. The current stats shows a...
MQTs with REFRESH IMMEDIATE need to allow more flexible definitions(RIMS)
1. MQTs with REFRESH IMMEDIATE need to allow more flexible definitions. To make MQTs feasible for an environment where quick ingest and low data latency is a priority, they cant be REFRESH DEFERRED because of the excessive locking that occurs dur...
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