Hi,
I have a fact table partitioned by date with a clustered index on date and product along with a ColumnStore Index on all columns. The table has approx. 250000000 rows of data. I am trying to figure our how well segment elimination is working and have noticed that the max and min data values in the sys.column_store_segments table are null and over 1000 entries in the table have a primary dictionary id of -1. Any help getting to the bottom of this would be greatly appreciated.
Thanks,
Richard
