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Yak Posting Veteran

69 Posts

Posted - 04/27/2013 :  18:25:54  Show Profile  Reply with Quote

declare @x varchar(max)

select @ax = REPLICATE('a',2000)
select @bx = REPLICATE('b',2000)
select @cx = REPLICATE('c',2000)
select @dx = REPLICATE('d',2000)
select @ex = REPLICATE('e',2000)

select @x = @ax + @bx + @cx + @dx + @ex

why this select SUBSTRING(@x,9000,150) dont bring to me 'eeeeeee'?
where is my mistake?

Yak Posting Veteran

69 Posts

Posted - 04/27/2013 :  18:44:11  Show Profile  Reply with Quote
Hi its me again
I found this solution.

set @x = Cast(@ax as Varchar(max)) +
Cast(@bx as Varchar(max)) +
Cast(@cx as Varchar(max)) +
Cast(@dx as Varchar(max)) +
Cast(@ex as Varchar(max))
select SUBSTRING(@x,9000,150)

now works fine,
is there another solution?
tks again

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In (Som, Ni, Yak)

17689 Posts

Posted - 04/27/2013 :  22:58:43  Show Profile  Reply with Quote
is @ax to @ex also varchar(max) ?

Time is always against us

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Yak Posting Veteran

69 Posts

Posted - 04/29/2013 :  12:02:30  Show Profile  Reply with Quote
No, they are @Ax to @ex varchar(8000)
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James K
Flowing Fount of Yak Knowledge

3873 Posts

Posted - 04/29/2013 :  12:14:00  Show Profile  Reply with Quote
Think of it as computing the right hand side (using the data types it is given) and then assigning the result to the left hand side variable. Since all the variables on the right hand side are varchar(8000), the intermediate result it calculates is also varchar(8000).

You can get around this by doing what you did, or even simply this, which forces the intermediate result to varchar(max)

SELECT @x = CAST(@ax AS VARCHAR(MAX)) + @bx + @cx + @dx + @ex
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