Scary Scalar Functions series overview
Part One: Parallelism
Part Two: Performance
Part Three: The Cure
Part Four: Your Environment
Foreword
In the previous posts, we have learned why Scalar Functions (UDFs) are bad for parallelism...
2022-10-10 (first published: 2022-10-02)
610 reads
Foreword
Not everything in the general sense, but a tool called Everything by voidtools (Download link). Usually, I have to make this distinction when googling.
No matter how great is my...
2022-09-27
35 reads
The problem
There was a need to make changes to a table with an Indexed View. Since Indexed Views must be created with SCHEMABINDING, the View must be dropped and...
2022-09-19 (first published: 2022-09-05)
316 reads
Foreword
A picture is worth a thousand words. I use screenshots daily, whether it’s to share results, how-to tutorials, point out mistakes or create memes.
None of the tools I’ve tried...
2022-08-11
41 reads
Scary Scalar Functions series overview
Part One: Parallelism
Part Two: Performance
Part Three: The Cure
Foreword
In the first two parts, we have seen why the Scalar functions (UDFs) are a problem for the...
2022-07-29 (first published: 2022-07-24)
554 reads
Foreword
This month’s invitation is from Deborah Melkin (b|t), about venting anything you want. So let’s start this rant.
There are only two hard things in Computer Science: cache invalidation and...
2022-07-29 (first published: 2022-07-12)
277 reads
Scary Scalar Functions series overview
Part One: Parallelism
Part Two: Performance
Foreword
In the second part of this series, we’ll look at how Scalar functions (or UDFs) affect performance.
If you want to follow...
2022-07-18 (first published: 2022-07-02)
559 reads
The problem
In this scenario, you have discovered that one of your Check constraints or Foreign keys is not trusted.
Maybe you’ve detected it with a sp_Blitz, dbachecks or out of...
2022-07-06 (first published: 2022-06-24)
356 reads
Foreword
I’m still surprised many people don’t realise how lousy Scalar functions (aka User Defined Functions aka UDFs) are. So because it’s my current focus in work and this Stack...
2022-06-21
25 reads
Foreword
This month’s invitation is from Mala Mahadevan, and it’s about coding standards. Fortunately, I may forget several basic ones because my team probably eradicated them long ago.
I’ll go with...
2022-06-14
7 reads
By Steve Jones
This value is something that I still hear today: our best work is done...
By gbargsley
Have you ever received the dreaded error from SQL Server that the TempDB log...
By Chris Yates
Artificial intelligence is no longer a distant concept. It is here, embedded in the...
Comments posted to this topic are about the item Planning for tomorrow, today -...
We have a BI-application that connects to input tables on a SQL Server 2022...
At work we've been getting better at writing what's known as GitHub Actions (workflows,...
I try to run this code on SQL Server 2022. All the objects exist in the database.
CREATE OR ALTER VIEW OrderShipping
AS
SELECT cl.CityNameID,
cl.CityName,
o.OrderID,
o.Customer,
o.OrderDate,
o.CustomerID,
o.cityId
FROM dbo.CityList AS cl
INNER JOIN dbo.[Order] AS o ON o.cityId = cl.CityNameID
GO
CREATE OR ALTER FUNCTION GetShipCityForOrder
(
@OrderID INT
)
RETURNS VARCHAR(50)
WITH SCHEMABINDING
AS
BEGIN
DECLARE @city VARCHAR(50);
SELECT @city = os.CityName
FROM dbo.OrderShipping AS os
WHERE os.OrderID = @OrderID;
RETURN @city;
END;
go
What is the result? See possible answers