I have created table partitioned by list on expression using timestamp column, 
so for each timestamp value function returns int and each partition table is 
for single value (range of timestamp for which function result is the same). 
This helps me to simplify querying as I do not need to always write date 
ranges. Querying (partition pruning) works nice, however when I attach new 
partition it seems to always scan whole table, although I do have necessary 
check constraint on partitioned table. I have tried to make timestamp column 
both null and not null. Also, it takes longer to attach partition then to add 
constraint itself although per my understanding those 2 operations should do 
the same scan.

Thank you,
Dinko

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