>>>A quick note: "Column = @Param OR @Param IS NULL" is not the same as "@Param IS NULL OR Column = @Param".
>>
>>Why? It is exactly the same.
>
>For MSSQL's sake, I hope it isn't!
>
>When the first condition is true, the second is not tested. So, in the second expression, if @Param IS NULL there is no need to check on Column's value.
This is not how MS SQL works query optimizer works. The order of conditions makes absolutely no difference.
If it's not broken, fix it until it is.
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