Verketten Nachricht in RAISERROR

Question

Was ist die richtige Syntax hier?

If (@timestamp < (Select PromoStartTimestamp From @promo)) 
    RAISERROR('Code not valid until ' + (Select PromoStartTimestamp From @promo) 
       ,16 
       ,1); 

Ich habe versucht:

If (@timestamp < (Select PromoStartTimestamp From @promo)) 
    RAISERROR(N'Code not valid until @starttimestamp' 
       ,16 
       ,1 
       ,(Select PromoStartTimestamp From @promo)); 

Michael Fredrickson Antwort gibt mir einen Fehler von Incorrect syntax near 'CAST'.

Answer 1

Sie %s als String Ersetzungsparameter in RAISERROR verwenden können:

DECLARE @PromoStartTimestamp DATETIME 
DECLARE @PromoStartTimestampString VARCHAR(50) 

SELECT @PromoStartTimestamp = PromoStartTimestamp From @promo 
SELECT @PromoStartTimestampString = CAST(@PromoStartTimestamp AS VARCHAR) 

If (@timestamp < @PromoStartTimestamp) 
    RAISERROR(N'Code not valid until %s' 
       ,16 
       ,1 
       ,@PromoStartTimestampString);