RAISERROR and the message isend throguh

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RAISERROR and the message isend throguh

Author

Topic

pelegk2
Aged Yak Warrior

723 Posts

Posted - 2007-06-07 : 10:12:25

i am doing this, to write the the event log :


set @Msg='Number of Rows Deleted on  is : ' +Cast (@@ROWCOUNT as varchar(10))
RAISERROR (@Msg  ,50000,1)

the thing is that if i try in a Stored Procedure concat a string i recive "error near '+' " ,and the code is this :


RAISERROR ('Number of Rows Deleted on  is : ' +Cast (@@ROWCOUNT as varchar(10))
,50000,1)

why i cant just do like the second code,but must do like the first 1?
thnaks in advance
peleg

Israel -the best place to live in aftr heaven 9but no one wan't to go there so fast -:)

nr
SQLTeam MVY

12543 Posts

Posted - 2007-06-07 : 11:08:01

raiserror doesn't allow a concatenation.
try

raiserror('Number of Rows Deleted on is : %d' ,50000,1, @@ROWCOUNT)

Not a good idea to use @@rowcount like this though.
add select @rowcount = @@rowcount
after your statement then use @rowcount in the raiserror.

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

pelegk2
Aged Yak Warrior

723 Posts

Posted - 2007-06-07 : 13:54:26

quote:
Not a good idea to use @@rowcount like this though.

what not?can u explain?

thnaks in advance
peleg

Israel -the best place to live in aftr heaven 9but no one wan't to go there so fast -:)

Lamprey
Master Smack Fu Yak Hacker

4614 Posts

Posted - 2007-06-07 : 15:39:09

@@ROWCOUNT (and all @@ system variables I think) are only valid for the previous execution. For example:

DECLARE @T TABLE (a INT)

INSERT @T
SELECT 1
UNION SELECT 2
UNION SELECT 3
UNION SELECT 4

IF @@ROWCOUNT = 4
	PRINT '4 and @@ROWCOUNT = ' + CAST(@@ROWCOUNT AS VARCHAR)

pelegk2
Aged Yak Warrior

723 Posts

Posted - 2007-06-10 : 05:55:20

Lamprey i dont understand what you are saying in the example?
the result i get is :

quote:

(4 row(s) affected)
4 and @@ROWCOUNT = 0

which means the select statment reseted the result?

thnaks
peleg

Israel -the best place to live in aftr heaven 9but no one wan't to go there so fast -:)

nr
SQLTeam MVY

12543 Posts

Posted - 2007-06-11 : 09:17:02

Every statement resets @@rowcount so
IF @@ROWCOUNT = 4
will reset @@rowcount to 0 so that is the value you get in the select.
in particular yo can't tetst @@rowcount and @@error separately

so better to do
select @rowcount = @@rowcount, @error = @@error
if @rowcount = 4
.....
if @error <> 0
.....

(not so much of a problem with the error handling in v2005).
==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

pelegk2
Aged Yak Warrior

723 Posts

Posted - 2007-06-14 : 05:47:05

grreat !:)

Israel -the best place to live in aftr heaven 9but no one wan't to go there so fast -:)

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