hello everyone,
I have a stored procedure where we declared a variable sql with nvarchar(4000) as datatype.
Now, this variable stores a sql query coming from a result set of a table.Once the variable data length is reached, query gets truncated and execution of this stored procedure fails. below is the stored procedure:
ALTER proc sp_singlevalued_selecttable_attributes_getall @debug bit=0
as
declare @mdtype nvarchar(30)
declare @tablename nvarchar(30)
declare @select nvarchar(30)
declare @mdname nvarchar(30)
declare @sql nvarchar(4000)
declare @counter INT
declare @rows INT
declare @resultTable table (
[indx] int identity (1, 1) not null primary key,
[mdname] [nvarchar] (30),
[tablename] [nvarchar](30) ,
[mdtype] [nvarchar] (30) ,
[select] [nvarchar] (30)
)
SET NOCOUNT ON
-- Get the RDS_DATA table from RdsData..RDS_MAP
insert into @resultTable (mdname, mdtype, tablename, [select])
select MD_NAME,
MD_TYPE,
'RdsData..' + RDS_DATA_TABLE as RDS_DATA_TABLE,
'RdsData..' + RDS_SELECT_TABLE as RDS_SELECT_TABLE
from RdsData..RDS_MAP where (MD_MULTI_VALUE=0 and RDS_SELECT_TABLE !='') and BASE_TABLE = 'Asset'
order by MD_NAME, MD_APPID
-- Build the dynamic query
select @sql = ''
select @counter = 1
select @rows = COUNT(*) from @resultTable
while (@counter <= @rows)
begin
select @mdname = mdname, @mdtype = mdtype, @tablename = tablename, @select = [select]
from @resultTable
where indx =@counter
-- see if joining select table for code resolution is necessary
set @sql = @sql + 'select UID, MD_KEY, TAG as VALUE, t1.UPDATE_STAMP,'''+@mdname+''' as MD_NAME, ' +@mdtype+' as MD_TYPE from ' + @tablename + ' t1 join ' + @select + ' t2 on t1.' + @mdname + ' = t2.TVALUE'
if (@counter < @rows)
select @sql = @sql + '
union all
'
select @counter =@counter + 1
end
exec sp_executesql @sql
if @debug = 1 print @sql
SET NOCOUNT OFF
please suggest.
regards,
Mayank
↧
