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I have a table FactUsers. with fields for Date, CompanyID, GrossCash and 20 other fields. and a measure named TotalGrossCash which is the sum of all the grosscash.

this table is partitioned by year-month (202401, etc) based on the Date field

  • i have row level security set up on CompanyID.
  • i have a dimdate table. this is linked to FactUsers based on Date field
  • I have a dimcompany table
  • i have a role - this has an RLS filter on dimcompany
  • Import mode (not directquery)

Q - when a user belonging to companyID 1 queries the table for April 2024 data, what exactly happens behind the scene?

  • does the engine have to look at the entire table to first filter for records belonging to companyID 1 (the RLS section) or does it immediately start looking at the Apr 2024 partition and then filter based on the RLS filter (companyid = 1)? Basically, is it capable of taking advantage of partitions by quickly going to the single partition even though RLS needs to be applied?

本文标签： ssas tabularRow Level security and partitioning in PowerBIStack Overflow

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