RLS error sometimes occurs when reports are run in Power BI Report Server. In order to track what query is transferred to the database, we installed Profiler on MSSQL.
As a result, we got that query was transferred without user when RLS fell, an example of a query received from PBI in MSSQL:
select fn.system_code
, fn.country
, fn.region
, fn.Client_type
, fn.total_sum
, fn.od_dt
, ul.local_user
FROM dbo.get_User_List() ul cross apply dbo.pb_return (ul.email) fn
At the same time, multiple queries can be simultaneously passed from PBI to MSSQL when report is executed, but the RLS error set only in the first query. The error is floating, and if the first request was successful, then the report is generated successfully until the session ends.
An example of a request from PBI to MSSQL, where RLS worked correctly:
SELECT
TOP (1000001) [t0].[Client_type],
(COUNT_BIG(DISTINCT [t0].[od_dt]) + MAX(CASE WHEN [t0].[od_dt] IS NULL THEN 1 ELSE 0 END))
AS [a0],SUM([t0].[equity])
AS [a1]
FROM
(
(
select fn.system_code
, fn.country
, fn.region
, fn.Client_type
, fn.total_sum
, fn.od_dt
, ul.local_user
FROM dbo.get_User_List() ul cross apply dbo.pb_return (ul.email) fn
)
)
AS [t0]
WHERE
([t0].[local_user] = N'user@mail.ru')
GROUP BY [t0].[Client_type]
Why is there a problem happened with RLS? And is there any solution?
PBI RS Version 1.13.8086.22725(January 2022)
Microsoft SQL Server 2017 (RTM-GDR) (KB4583456) - 14.0.2037.2 (X64)
Nov 2 2020 19:19:59
Copyright (C) 2017 Microsoft Corporation
Enterprise Edition (64-bit) on Windows Server 2016 Standard 10.0 <X64> (Build 14393: ) (Hypervisor)
