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SQL Server 2019

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What’s New in SQL Server 2019: Faster Table Variables (And New Parameter Sniffing Issues)

Brent Ozar
Parameter Sniffing, SQL Server 2019, T-SQL
16 Comments
For over a decade, SQL Server’s handling of table variables has been legendarily bad. I’ve long used this Stack Overflow query from Sam Saffron to illustrate terrible cardinality estimation: Transact-SQL declare @VoteStats table (PostId int, up int, down int) insert @VoteStats select PostId, up = sum(case when VoteTypeId = 2 then 1 else 0 end), down…
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What’s New in SQL Server 2019: Adaptive Memory Grants

Brent Ozar
Execution Plans, Memory Grants, Parameter Sniffing, SQL Server 2019
3 Comments
When you run a query, SQL Server guesses how much memory you’re going to need for things like sorts and joins. As your query starts, it gets an allocation of workspace memory, then starts work. Sometimes SQL Server underestimates the work you’re about to do, and doesn’t grant you enough memory. Say you’re working with…
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Announcing SQL Server 2019

Erik Darling
SQL Server 2019
6 Comments
TEASE Who Let The Docs Out? Ignite must be coming up. If you head over to Microsoft’s GitHub repo, you can peruse around for stuff updated recently. Maybe you’ll create an account. Maybe you’ll start contributing to open source projects. Maybe you’ll quietly slip into a world of solitude for days on end. Happy Saturday!…
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Brent Ozar reading

What Would You Put in SQL Server 2019?

Brent Ozar
SQL Server 2019
186 Comments
If you were leading Microsoft’s development programs, what would you add or change in SQL Server 2019? Forget licensing or pricing changes – that’s dictated by the marketing teams, and those decisions are made really close to the release date. Instead, let’s think bigger: what are the really big improvements you’d make that would really…
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