MSSQLSERVER_12301

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric

Details

Attribute	Value
Product Name	SQL Server
Event ID	12301
Event Source	MSSQLSERVER
Component	SQLEngine
Symbolic Name	HK_UNSUPPORTED_NULLABLE_COLUMNS
Message Text	Nullable columns in the index key are not supported with 'construct'.

User Action

Do not use nullable columns in the index key.

See Also

In-Memory OLTP (In-Memory Optimization)