Facing Problem in dynamic cursor in sql server 2008

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1.00/5 (1 vote)

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declare @str nvarchar(1000)
declare @cstr nvarchar(2000)


DECLARE @c1 CURSOR
   set @str=N'SELECT EmpID FROM  Emp where ' + @whereqry 
    
 set @cstr = 'SET @c1  = CURSOR FOR ' + @str

 exec sp_executesql @cstr 
 open @c1
FETCH NEXT
FROM @c1 INTO @id
WHILE @@FETCH_STATUS = 0
BEGIN
........

FETCH NEXT
FROM @c1 INTO @id
END
CLOSE @c1
DEALLOCATE @c1

When i execute procedure error comes

Must declare the scalar variable "@c1".
The variable '@c1' does not currently have a cursor allocated to it.

Can someone shed some light?

Posted 10-Jun-12 21:38pm

vvibha

Updated 10-Jun-12 22:11pm

Sridhar Patnayak

v2

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db7uk · Accepted Answer · 2012-06-10T22:28:00

You cant (I believe) have a dynamic cursor this way. You would need to have the whole cursor declaration in a string and execute the sql. i.e.

SQL

declare @str nvarchar(1000)
declare @cstr nvarchar(2000)
 
set @str=N'SELECT EmpID FROM  Emp where ' + @whereqry 
set @cstr = 'DECLARE c1 CURSOR FOR ' + @str

exec sp_executesql @cstr 
open c1
FETCH NEXT
FROM c1 INTO @id
WHILE @@FETCH_STATUS = 0
BEGIN
........
 
FETCH NEXT
FROM c1 INTO @id
END
CLOSE c1
DEALLOCATE c1

reference : http://stackoverflow.com/questions/1045880/using-a-cursor-with-dynamic-sql-in-a-stored-procedure[^]