Dynamically evaluate an expression stored in a table column - sql

Question

I have the following table
PnlId LineTotalisationId Designation Totalisation
1 A Gross Fees Formule A01+A02+A03+A04+A05
2 A01 GF1 Comptes B01+B02+B03+B04+B05
3 A02 GF2 Comptes C01+C02+C03+C04+C05
4 A03 GF3 Comptes 99991
5 A04 GF4 Comptes 99996
6 A05 GF5 Comptes 999995
14 B1 Perm Comptes 12+14+25
I am looking to get
If Designation=Formule in Totalisation LineTotalisationId name for PnlId contents number so I should concat Totalisation for all Totalisation else I will simply add the row
I try the following code
SELECT Ref.*,
CASE
WHEN Charindex('+', Ref.totalisation) > 0 THEN '+'
WHEN Charindex('/', Ref.totalisation) > 0 THEN '/'
WHEN Charindex('*', Ref.totalisation) > 0 THEN '*'
WHEN Charindex('*', Ref.totalisation) > 0 THEN '-'
END AS Operator
INTO ##ttresults
FROM [dbo].[pnlreference] Ref
WHERE [typetotalisation] = 'Formule'
AND totalisation <> ''
AND designation NOT LIKE '%[0-9]%'
AND designation != ''
SELECT split.linetotalisationid AS PNLParentId,
NULL AS Totalisation
INTO ##tempresults
FROM (SELECT tbl.designation,
tbl.linetotalisationid,
tbl.typetotalisation,
tbl.pnlid,
tbl.totalisation,
Cast('<t>'
+ Replace(tbl.totalisation, tbl.operator, '</t><t>')
+ '</t>' AS XML) x,
tbl.operator
FROM ##ttresults AS tbl) split
CROSS apply x.nodes('/t') t(c)
INNER JOIN [dbo].[pnlreference] Ref
ON Ref.linetotalisationid = t.c.value('.', 'nvarchar(255)')
WHERE Ref.designation LIKE '%[0-9]%'
OR Ref.designation = ''
GROUP BY split.linetotalisationid ;
The code above returns as result
PNLParentId
A
Is there a way to modify it to get totalisation as it is described ?

Answer 1

If your sample data represent your data, you can try below sql
Assuming Panel is your table name and the Line field only have 1 string character
Declare #sql nvarchar(max);
;
set #sql =
'with cte as
(
select
case
when patindex(''%[A-Z]%'',Line) > 0
then
substring(line,patindex(''%[A-Z]%'',Line),1)
end as LineId
,Totalisation
from panel
where line in (' +''''+ (select replace(a.totalisation,'+',''',''') from Panel a where Designation='formule' ) + '''' +')
union all
select
Line as LineId,
Totalisation
from panel
where line not in (' +''''+ (select replace(a.totalisation,'+',''',''') from Panel a where Designation='formule' ) + '''' +')
and Designation <> ''Formule''
'
+ ')
select
distinct
p.pnlId, p.Line, p.TotalisationId--, p.Designation ,P.Totalisation
,LineId, LTRIM(substring(stuff
(
(
select '' | '' + c2.Totalisation from cte c2 where c.LineId = c2.LineId for xml path('''')
)
,1,0,''''
),3,len(stuff
(
(
select '' | '' + c2.Totalisation from cte c2 where c.LineId = c2.LineId for xml path('''')
)
,1,0,''''
)))
) as Totalisation
from cte c
right join panel p on c.LineId = p.Line
where c.Totalisation is not null
'
;
exec(#sql)
/*
RESULT
pnlId Line TotalisationId LineId Totalisation
----------- ----- -------------- ------ --------------------------------------
1 A Gross Fees A 99999 | 99998 | 99991 | 99996 | 999995
14 B1 Perm B1 12+14+25
*/
UPDATED
TO use #roopesh Sample data B1 'Formule'
declare #formula nvarchar(max);
;
with cte as
(
select
distinct 1 as id, p.Totalisation
from
panel2 p
where Designation = 'formule'
)
select
distinct #formula = '''' + Replace(replace(substring(stuff
(
(
select ',' + c2.Totalisation from cte c2 where c.id = c2.id for xml path('')
)
,1,0,''
),2,len(stuff
(
(
select ',' + c2.Totalisation from cte c2 where c.id = c2.id for xml path('')
)
,1,0,''
))),',',''','''),'+',''',''') + ''''
from cte c
;
Declare #sql nvarchar(max);
;
set #sql =
'
;with cte as
(
select
case
when patindex(''%[A-Z]%'',Line) > 0
then
substring(line,patindex(''%[A-Z]%'',Line),1)
end as LineId
,Totalisation
from panel2
where line in (' + #formula +')
union all
select
Line as LineId,
Totalisation
from panel2
where line not in (' + #formula +')
and Designation <> ''Formule''
'
+ ')
select
distinct
p.pnlId, p.Line, p.TotalisationId--, p.Designation , p.totalisation
,LineId, Case when c.totalisation is null and p.designation=''Formule'' then p.totalisation
else
LTRIM(substring(stuff
(
(
select '' | '' + c2.Totalisation from cte c2 where c.LineId = c2.LineId for xml path('''')
)
,1,0,''''
),3,len(stuff
(
(
select '' | '' + c2.Totalisation from cte c2 where c.LineId = c2.LineId for xml path('''')
)
,1,0,''''
)))
)
end as Totalisation
from cte c
right join panel2 p on c.LineId = p.Line
where p.Designation = ''Formule''
'
;
exec(#sql)

Answer 2

This stored procedure comes as a solution for your problem. It is using cursor. May be there is a way to remove the cursor, but could not get till now. So got this solution.
CREATE Procedure [dbo].[spGetResult]
As
Begin
declare #curPNL cursor
declare #pnlid int
declare #Line varchar(10), #TotalisationId varchar(20), #Totalisation varchar(50)
declare #spresult table(PNLId int, Line varchar(10), TotalisationId varchar(20), result varchar(4000));
--declare the cursor
set #curPNL = cursor
for select PnlId, Line, TotalisationId, totalisation
from PNLTable where designation = 'Formule'
open #curPNL
Fetch Next From #curPNL into #pnlId, #Line, #TotalisationId, #Totalisation
While ##FETCH_STATUS = 0
Begin
declare #nsql nvarchar(4000);
declare #table table(tname varchar(50));
declare #result varchar(4000)
delete from #table
--get the totalisation data for specific column
set #nsql = 'select totalisation from PNLTable Where Line in (''' + replace(#Totalisation,'+',''',''') + ''')';
print 'Calling child'
insert into #table
exec(#nsql);
set #result = '';
if not exists (select 1 from #table)
Begin
set #result = replace(#Totalisation,'+','|')
End
else
Begin
--get the values of totalisation in a pipe separated string
select #result = case when #result = '' then '' else #result + '|' end + tname from #table;
End
--insert the values in the temporary table
insert into #spresult(PNLId, Line, TotalisationId, result)
select #pnlid, #Line, #TotalisationId, #result
Fetch Next From #curPNL into #pnlId, #Line, #TotalisationId, #Totalisation
End
close #curPNL
deallocate #curPNL
select * from #spresult;
End
Though the table structure was not very much clear to me. But I used the following script to create the table and insert the data.
CREATE TABLE [dbo].[PNLTable](
[PnlId] [int] NOT NULL,
[Line] [varchar](10) NULL,
[TotalisationId] [varchar](20) NULL,
[Designation] [varchar](20) NULL,
[Totalisation] [varchar](50) NULL,
PRIMARY KEY CLUSTERED
(
[PnlId] ASC
)
)
--insert data
INSERT [PNLTable]
([PnlId], [Line], [TotalisationId], [Designation], [Totalisation])
VALUES (1, N'A', N'Gross Fees', N'Formule', N'A01+A02+A03+A04+A05'), (2, N'A01', N'GF1', N'Comptes', N'99999')
,(3, N'A02', N'GF2', N'Comptes', N'99998'), (4, N'A03', N'GF3', N'Comptes', N'99991'), (5, N'A04', N'GF4', N'Comptes', N'99996')
, (6, N'A05', N'GF5', N'Comptes', N'999995'), (14, N'B1', N'Perm', N'Formule', N'12+14+25')

Answer 3

You have to generate a dynamic sql query using the formular from Designation=Formule instead of using a big static query. Then run the code by using EXEC.
The query could be something like this:
SELECT
(SELECT Totalisation WHERE Line = 'A01')
+
(SELECT Totalisation WHERE Line = 'A02')
+
(SELECT Totalisation WHERE Line = 'A03')
+
(SELECT Totalisation WHERE Line = 'A04')
+
(SELECT Totalisation WHERE Line = 'A05')
FROM [dbo].[pnlreference] AS Ref
WHERE Designation = 'Formule'
AND LEFT(Line, 1) = 'A'
Maybe split the formular content into single entries and operators and load it into a temp table wich contains the formular (perhabs A01 and A02, etc.) and a id.
Then generate the code: The code could be something like this:
EXEC 'SELECT
(SELECT Totalisation WHERE Line = ' + CAST((SELECT Formular FROM #formular WHERE id = 0) AS VARCHAR(MAX)) +')
' + CAST((SELECT Operator FROM #formular WHERE id = 1) AS VARCHAR(MAX)) +'
(SELECT Totalisation WHERE Line = ' + CAST((SELECT Formular FROM #formular WHERE id = 1) AS VARCHAR(MAX)) +')
' + CAST((SELECT Operator FROM #formular WHERE id = 2) AS VARCHAR(MAX)) +'
(SELECT Totalisation WHERE Line = ' + CAST((SELECT Formular FROM #formular WHERE id = 2) AS VARCHAR(MAX)) +')
' + CAST((SELECT Operator FROM #formular WHERE id = 3) AS VARCHAR(MAX)) +'
(SELECT Totalisation WHERE Line = ' + CAST((SELECT Formular FROM #formular WHERE id = 3) AS VARCHAR(MAX)) +')
' + CAST((SELECT Operator FROM #formular WHERE id = 4) AS VARCHAR(MAX)) +'
(SELECT Totalisation WHERE Line = ' + CAST((SELECT Formular FROM #formular WHERE id = 4) AS VARCHAR(MAX)) +')
FROM [dbo].[pnlreference] AS Ref
WHERE Designation = ''Formule''
AND LEFT(Line, 1) = ' + LEFT(CAST((SELECT Formular FROM #formular WHERE id = 0) AS VARCHAR(MAX)), 1);