Question

How would you implement that check? You have N parameters for a stored procedure.

If all value are null or 0 or empty string, run the code else skip it

This is how I implemented it, is there a better way?

I really don’t like what I did so I’m open to any better idea, must be easily maintainable since it would be done at many places

    declare @doRunIt bit
    declare @checkAllNull varchar(max)
    declare @sumOfInt int

    set @checkAllNull = ''
    set @checkAllNull = @checkAllNull + coalesce(@param1,'')
    set @checkAllNull = @checkAllNull + coalesce(@param2,'')
    set @checkAllNull = @checkAllNull + coalesce(@param3,'')
    set @checkAllNull = @checkAllNull + coalesce(@param4,'')
    set @checkAllNull = @checkAllNull + coalesce(@param5,'')
    set @checkAllNull = @checkAllNull + coalesce(@param6,'')

    set @sumOfInt = coalesce(@param7,0)+coalesce(@param8,0)+
                    coalesce(@param9,0)+coalesce(@param10,0)+
                    coalesce(@param11,0)+coalesce(@param12,0)

    set @checkAllNull = @checkAllNull + cast(@sumOfInt as varchar(max))



    if ( isnumeric(@checkAllNull)=1 )
        if (cast(@checkAllNull as int) > 0)
            set @doRunIt = 1
        else
            set @doRunIt = 0
    else
        if (ltrim(rtrim(@checkAllNull)) <> '')
            set @doRunIt = 1
        else
            set @doRunIt = 0

End goal is to move the check made in code for inserting empty row, if all parameters are null or using default value, in the DB into the stored procedure, so other apps can call the same stored procedure without having to deal with checking for empty row.

Answer 1

Your code

DECLARE @IsValid BIT = dbo.IsValidParameter(@param1) & 
                       dbo.IsValidParameter(@param2) & 
                       dbo.IsValidParameter(@param3) & 
                       dbo.IsValidParameter(@param4)

Helper function

CREATE FUNCTION dbo.IsValidParameter(@p1 Sql_Variant)
RETURNS bit
AS
BEGIN
    IF @p1 IS NULL OR @p1 = '' OR @p1 = 0
        RETURN 0    
    RETURN 1    
END
GO