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According to this link, columns in SSAS tabular models are limited to 2 billion DISTINCT values. Does this apply across partitions?
For example, say I have a fact table with 4 billion records and a PK column containing values from 1 to 4,000,000,000. Based on the link above, I’m assuming processing would fail once it hit the limit. So could I partition the table and have the 2billion distinct limit apply at the partition level?
Also, does this limit apply to DirectQuery partitions?
Yes, once you go beyond 2B distinct values, processing would fail. A way to work around this issue would be to create two separate tables and then use DAX to merge them together.