SQL Server 2019 - CU 13 Problem with Memory Optimized Table Type

Question

I recently installed CU 13 on my test SQL Server 2019 server.

Now, when running CheckDB I'm getting a consistency error with a simple memory optimized table type.

CREATE TYPE [dbo].[ADUserType] AS TABLE(
[UserId] VARCHAR NOT NULL,
[Name] VARCHAR NULL,
PRIMARY KEY NONCLUSTERED (UserId)
)WITH ( MEMORY_OPTIMIZED = ON)
GO

DBCC CHECKDB (MyDatabase) WITH EXTENDED_LOGICAL_CHECKS

"Verified integrity of statistics 'sys.TT_ADUserType_094028A5.PK__TT_ADUse__1788CC4D0F98FE70'. Msg 9122, Level 16, State 201, Line 17 The statistics 'sys.TT_ADUserType_094028A5.PK__TT_ADUse__1788CC4D0F98FE70' is corrupt."

Is this a bug in the update? Or do I need to create the type differently?

Thanks!

Answer 1

Indeed. I get the same issue. I created your type in AdventureWorks2016, which seems to have a few more memory-optimized data types, and they also errored out.

I would guess the issue is in DBCC CHECKDB.

Answer 2

I reproduced the same problem in SQL Server 2019 on Linux (Docker).
It started in CU13 and was fixed in CU17.

Answer 3

Hi @John ,

In CU13 for SQL Sserver2019, corrupt statistics can be detected by using extended_logical_checks as part of DBCC CHECKD, try to update the statistics:
https://learn.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/statistics-for-memory-optimized-tables?view=sql-server-ver15

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