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STRING and FIND SQL Functions


STRING and FIND SQL Functions

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Pedro Costa
Pedro Costa
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Comments posted to this topic are about the item STRING and FIND SQL Functions
Jeff Moden
Jeff Moden
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I appreciate anyone that takes the time to post solutions for common problems.

With that and considering that these functions appear to be scalar functions with While loops, and the possible hidden performance problems of returning NVARCHAR output to something that passed in VARCHAR inputs, what have you done insofar as performance testing?

--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

When you put the right degree of spin on it, the number 318 is also a glyph that describes the nature of a DBAs job. Wink

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Jeff Moden
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Sigh... and so it goes. Discuss



--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

When you put the right degree of spin on it, the number 318 is also a glyph that describes the nature of a DBAs job. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Pedro Costa
Pedro Costa
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Hi Jeff,
This was part of my college degree final project and the focus was on adding functionality over the string search with a new FIND function and creating an easy, standard, intuitive and readable way of operating transformations over a string with a new STRING function.
Both needs that I think urge on SQL Server and come in the way Microsoft has been building on the most recent SQL Server versions.
Therefore, the performance was not the focus but anyway analyzed for several examples in comparison with the current alternative using the string SQL system functions and the results were, as expected, poor, mostly when executing the STRING transformations with multiple operator.
Here is the complete report on the assignment.

Best regards
Pedro Costa
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Jeff Moden
Jeff Moden
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Group: General Forum Members
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Thanks, Pedro. I'll take a look.

--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

When you put the right degree of spin on it, the number 318 is also a glyph that describes the nature of a DBAs job. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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