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T-SQL Coding - How do you code error handling logic in your SQL Server stored procedures?


T-SQL Coding - How do you code error handling logic in your SQL Server stored procedures?

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Arjun SreeVastsva
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T-SQL Coding - How do you code error handling logic in your SQL Server stored procedures?
Paul White
Paul White
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^^^^ R a j u ^^^ (2/17/2010)
T-SQL Coding - How do you code error handling logic in your SQL Server stored procedures?

Bug-free, naturally :-)



Paul White
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Input parameter validation and TRY...CATCH blocks are a great start
TomThomson
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It's a good idea to do some logging when an error are detected, as well as trying to recover or contain the error.
And of course code defensively (detect the impossible happening and deal with it), and (paraphrasing Paul) correctly.

Tom

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LOL! A 5 year old thread?

Well, since you brought it up, this is how I do it.

Logging and Error Handling for SQL Stored Procedures


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Jeff Moden
Jeff Moden
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I find that many people don't actually know how to write Try/Catch. What they end up doing is throwing the same error but in a manner that obfuscates where the problem actually occurred.

I also agree with Paul White. Write code that won't fail whenever possible. :-)

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Jeff Moden (4/21/2015)

I also agree with Paul White. Write code that won't fail whenever possible. :-)


Me too! Makes testing a whole lot simpler and quicker!


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Go


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