Cross-Container Transactions With Memory-Optimized Objects

Ned Otter continues his series on In-Memory OLTP isolation levels:

Why will it fail?

It will fail because the initiation mode of this transaction is not autocommit, which is required for READ COMMITED SNAPSHOT when referencing memory-optimized tables (the initiation mode is explicit, because we explicitly defined a transaction).  So to be totally clear, for queries that only reference memory-optimized tables, we can use the READ COMMITTED or READ COMMITTED SNAPSHOT isolation levels, but the transaction initiation mode must be autocommit. Keep this in mind, because in a moment, you’ll be questioning that statement….

There are some interesting implications that Ned teases out, so I recommend giving it a careful read.

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Memory-Optimized Table Maintenance

Ned Otter has a great post looking at what you can and cannot do with memory-optimized tables containing certain types of indexes: Now, let’s attempt to create a NONCLUSTERED COLUMNSTORE INDEX: ALTER TABLE dbo.InMemADD ADD INDEX NCCI_InMem NONCLUSTERED COLUMNSTORE (col1); Msg 10794, Level 16, State 76, Line 76 The feature ‘NONCLUSTERED COLUMNSTORE’ is not supported […]

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Parent-Child Relationships And Native Compilation

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