How to print DateTime variable in the RAISERROR method?

Question

My Stored Procedure accepts two params @EffectiveStartDate DATETIME
@EffectiveEndDate DATETIME

I wrote the validation code as this:

IF(@EffectiveStartDate > @EffectiveEndDate)
        BEGIN
            RAISERROR ('SPName: InsertUpdateLiquidityDateRule:  Start Date: %s cannot  be greater than End Date %s',11,1,CAST(@EffectiveStartDate AS varchar(30)),CAST(@EffectiveEndDate AS varchar(30)));
            RETURN -1
        END 

May I know what am I doing wrong here.

While Compiling my SProc, it raised the message 'Incorrect syntax near CAST()'

Answer 1

The supplied value must be a constant or a variable. You cannot specify a function name as a parameter value. (from MSDN Executing Stored Procedures).

You need to do something like this:

declare @EffectiveStartDateText varchar(30)
set @EffectiveStartDateText = cast(@EffectiveStartDate as varchar)

declare @EffectiveEndDateText varchar(30)
set @EffectiveEndDateText = cast(@EffectiveEndDate as varchar)

RAISERROR (
    'SPName: InsertUpdateLiquidityDateRule:  Start Date: %s cannot  be greater than End Date %s',
    11,
    1,
    @EffectiveStartDateText,
    @EffectiveEndDateText);