Question

We are developing an application where sometime we need to support more than one versions of that software at a time. For example Release 1-0-300 , 1-0-300-With-Test-FunctionalityA, Release 1-0-300-With-Test-FunctionalityB. Due to such requirements we sometime use the same Stored Procedure with different name in different versions for example

“1-0-300” uses Stored Procedures “USP_GetProucts“

“1-0-300-With-Test-FunctionalityA” uses Stored Procedures “USP_GetProucts_FunctionalityA“

“1-0-300-With-Test-FunctionalityB” uses Stored Procedures “USP_GetProucts_FunctionalityB“

Some Facts:

1- Why we are not using some alternate solution like we can have a Parameter “WhichStoredProcedureToCall” based on that parameter we can call the required STored Procedure?
Because “USP_GetProucts” can have total different functionality than “USP_GetProucts_FunctionalityA” & these are huge stored procedures.

2- We are using SQL2008.

So my question is can we implement some type of “Stored Procedure Redirect“, if “USP_GetProucts_FunctionalityA” not found then get the results form “USP_GetProucts”

Regards.

Answer 1

You can see if a stored procedure exists acessing to the sysobjects table:

IF EXISTS(select name from sysobjects where type = 'P' and name = 'tablename')
  BEGIN
     select 1
  END

Then you simply need to make the necessary IF‘s.

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Since you are using SQL Server, you could have a look into SINONYMS.

You could make USP_GetProucts, USP_GetProucts_FunctionalityA and USP_GetProucts_FunctionalityB sinomyns 🙂