nested cursors , where oh where am I going wrong with this

Question

nested cursors , where oh where am I going wrong with this

Simon_L

SSCarpal Tunnel

Points: 4669
More actions
January 21, 2008 at 8:58 am

#178377

soon I will have no hair left to tear out and for me just hitting middle age thats not good
the following code fails when it says must declare the @tbl variable within the nested cursor
help !! please
simon
--
DECLARE @TBL varchar(32),
@SQLSTR VARCHAR (1000),
@ctrl CHAR (2),
@person_code varchar(15),
@ID varCHAR (10),
@max_no varchar(3),
@report_code varchar(3)
SET @ctrl = CHAR (13) + CHAR (10)
set @person_code = '1'
set @ID = '997'
create table #temp_number
(table_name varchar (50),
report_code varchar (10),
REPORT_NO varchar (10)
)
DECLARE TBLCUR CURSOR FOR
select distinct table_name
from information_schema.columns where column_name = 'REPORT_NO'
order by 1
OPEN TBLCUR
FETCH NEXT FROM TBLCUR INTO @TBL
WHILE @@FETCH_STATUS = 0
BEGIN
declare value cursor for
select report_code, max(REPORT_NO)
from @TBL
where person_code = @person_code
and ID = @ID
--
OPEN value
--
FETCH NEXT FROM value INTO @report_code,@values
--
WHILE @@FETCH_STATUS = 0
BEGIN
insert #temp_number (table_name)
values (@tbl)
update #temp_number
set REPORT_NO = @values,
report_code = @report_code
where table_name = @tbl
FETCH NEXT FROM value INTO @report_code,@values
end
CLOSE value
DEALLOCATE value
FETCH NEXT FROM TBLCUR INTO @TBL
end
CLOSE TBLCUR
DEALLOCATE TBLCUR
go
DROP TABLE #temp_number

Viewing 5 posts - 1 through 4 (of 4 total)

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Steve Jones - SSC Editor SSC Guru Points: 736478 More actions · Answer 1

I'm not 100% sure, but it's possible that you can't open two cursors on a table variable.There might be some scope issue here.

Any reason not to move this to a temp table and use that?

Simon_L SSCarpal Tunnel Points: 4669 More actions · Answer 2

Steve Jones - Editor (1/21/2008)
I'm not 100% sure, but it's possible that you can't open two cursors on a table variable.There might be some scope issue here.
Any reason not to move this to a temp table and use that?

changed #temp_number to temp_number , still get

Server: Msg 137, Level 15, State 2, Line 42

Must declare the variable '@TBL'.

Server: Msg 137, Level 15, State 1, Line 47

Must declare the variable '@values'.

weeps 🙁

si

GSquared SSC Guru Points: 260824 More actions · Answer 3

You're declaring @TBL as a varchar, then trying to select from it. You can't select from a varchar variable.

Either @TBL needs to be declared as variable type "table", and your first cursor needs to be re-written to insert into that table, or the second cursor needs to be rewritten to select differently.

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Mark Cowne One Orange Chip Points: 26954 More actions · Answer 4

From what I can see, you'll need to use some dynamic SQL to select from @TBL.

Try replacing this

declare value cursor for

select report_code, max(REPORT_NO)

from @TBL

where person_code = @person_code

and ID = @ID

with this

declare @sql nvarchar(4000)

set @sql=N'declare value cursor for

select report_code, max(REPORT_NO)

from '+@TBL+'

where person_code = @person_code

and ID = @ID '

execute sp_executesql

@sql,

N'@person_code varchar(15),@ID varchar (10)',

@person_code = @person_code,

@ID = @ID

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