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Editorial Team
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Asked: 2026-05-28T23:38:09+00:00

I have read plenty of articles (particularly on here) about Parameter Sniffing in Stored

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I have read plenty of articles (particularly on here) about Parameter Sniffing in Stored Procedures and ways to get around it. For example, here: http://elegantcode.com/2008/05/17/sql-parameter-sniffing-and-what-to-do-about-it/

Does the same apply to a stored procedure that is called by another stored procedure? i.e. does the solution described in the linked article also apply to nested stored procedure.

Also if you declare a variable called @PersonID in the calling stored procedure, can you decalre a variable called @PersonID in the called stored procedure i.e. DECLARE PersonID int. This would be variable shadowing.

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  1. Editorial Team

    Yes to the first one. Each stored procedure is separate and you need to apply anti-sniffing techniques (parameter masking, or the newer OPTIMISE FOR UNKNOWN) in each stored procedure

    Yes to the second, but not why you think. A variable has scope only in that stored procedure. So any @PersonID in the callee is unrelated to the @PersonID in the caller. If you don’t have @PersonID in the callee, then you the parent one isn’t in scope there

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