28May 2009 by Grant Fritchey 3 Comments

Spatial Index & Performance & Brain Pain

Spatial Data, T-SQL
In my previous post, Spatial Data Hurts My Brain, I showed how a query used the spatial index, but hurt performance. Several people jumped in to try to help out. Thanks to Bob Beauchamin, Isaac Kunin, Gail Shaw, and Valerie Yakich (via Twitter). I've definately learned a bit more than I knew previously about spatial data and spatial indexes. I've posted about it before, but it bears repeating, if you're just starting out, I can't recommend Alistair Aitchison's book, Beginning Spatial with SQL Server 2008, enough. Here's where I'm at. I think I was confusing/confused/confounded/something about what to expect from a spatial index. I'm going to present two queries and two indexes and try to explain why each works well, or not together, mainly as a means for enabling my…
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27May 2009 by Grant Fritchey 13 Comments

Spatial Data Hurts My Brain

Spatial Data, T-SQL
I'm still barely scratching the surface working with spatial data in SQL Server 2008. We've ported some of the data into a table where we built a geography spatial data column and we're begginning to work with point data. The requirements from the developers are, so far, very simple. They'll feed me a point and I find all the locations "close" to it. We had to go round & round on what defines "close" but finally settled on, I think, 15km. The query to answer a question like this is ridiculously simple (a few object names have been changed): SELECT ebe.[Location].STDistance(@Location) AS Distance, ebe.[InterestId], ebe.[Location].Lat AS Latitude, ebe.[Location].Long AS Longitude, ebe.[OrgId] FROM dbo.[ebe] AS ebe WHERE ebe[OrgId] = @OrgId AND ebe.[Location].STDistance(@Location) < @CloseDistance I'm not even hard-coding the "close" value…
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27May 2009 by Grant Fritchey 16 Comments

WHOOOP!

PASS, SQL Server, T-SQL
I just got the good word, I submitted an abstract for a spotlight session at the PASS Summit and it was accepted. Jazzed doesn't begin to describe it. If you're interested in hearing what I think about Best Practices for working with Execution Plans, please swing by.
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20May 2009 by Grant Fritchey 5 Comments

Odd TSQL Behavior

SQL Server, T-SQL
Before I describe this, let me thank Lynn Pettis over at SQL Server Central for coming up with the answer. This morning a developer walked up and asked me what would happen if he ran a query that looked like this: SELECT 1.SomeString I said that he'd get an error. No, he says, try it. So I try it and I get this: Somestring 1 Try it yourself. It works just fine. I'd never seen that before and didn't have a clue what it was. Thinking that Microsoft had supplied some new short hand to define aliases I ran this: SELECT 'dude'.dudette Which resulted in the error:   Msg 258, Level 15, State 1, Line 1 Cannot call methods on varchar.   Which is what I would have expected. I…
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14May 2009 by Grant Fritchey No Comments

Powershell Blog Worth Reading

PowerShell
I don't usually make a big deal about my blog roll. I usually add either people I read regularly or people who ask to be added. I don't have a hierarchy of belonging & all that (yet). But I want to point out one that I just recently put up. Chad Miller, creator of SQL Server PowerShell Extension, blogs about SQL Server & PowerShell. If you're not already reading his stuff, you should. Unlike me, he really knows what he's talking about.
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14May 2009 by Grant Fritchey 4 Comments

More PowerShell Basics

PowerShell
Because of the data center move, we have a number of different functions that we're running on totally different sets of servers on different days. None of this is part of our normal maintenance routines, so I've been using it as a great opportunity to stretch a little with PowerShell. I'm still learning, a lot. The latest task was to get the databases of a list of servers backed up. I initially tried it using SMO. It works great. But it's serial across all the servers as well as across the databases. I'm fine with serial backups on the databases (very, very fine, I saw a parallel backup of all databases once, pretty sparks, like the Fourth of July) but I really wanted all the servers to get backed up…
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12May 2009 by Grant Fritchey 2 Comments

PowerShell Basics

PowerShell
I'm just learning how to use PowerShell. I've been trying to spend time with it over the last year, ever since I saw Allen White's presentations at the PASS Summit last year. I just haven't had the time. But recently, my company has been performing a multi-phased data center move. Because of it, I've needed to run tests & updates, disable jobs, all kinds of things on different sets of servers on different days. To paraphrase the old Superman cartoons "This looks like a job <voice gets deeper> for PowerShell." I'm not even remotely qualified to begin teaching anyone PowerShell. I had problems recently getting an IF conditional statement to work correctly. However, in the interest of sharing, in case you're thinking about picking it up (do) or you're actively…
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04May 2009 by Grant Fritchey 6 Comments

Help Make Connect Work Better

Misc
I've posted several times about how useful I find Microsoft Connect. I've seen issues introduced there get resolved through hot fixes and service packs. I sincerely believe it's a very important tool in your arsenal to get the kind of service you need from Microsoft. Here's a post on Connect that's trying to make Connect itself easier to use. I'd strongly recommend you swing by and vote positively for this. And for those who are unclear, click on the stars to submit your vote.
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