Handling Large Queries In A Table Valued User Defined Function

Table-valued User-defined Function: Commands Completed Successfully, Where Is The Result? How Can I See Output Of The Result?
Hi all,
 
I copied the following code from Microsoft SQL Server 2005 Online (September 2007):
UDF_table.sql:

USE AdventureWorks;

GO

IF OBJECT_ID(N'dbo.ufnGetContactInformation', N'TF') IS NOT NULL

DROP FUNCTION dbo.ufnGetContactInformation;

GO

CREATE FUNCTION dbo.ufnGetContactInformation(@ContactID int)

RETURNS @retContactInformation TABLE

(

-- Columns returned by the function

ContactID int PRIMARY KEY NOT NULL,

FirstName nvarchar(50) NULL,

LastName nvarchar(50) NULL,

JobTitle nvarchar(50) NULL,

ContactType nvarchar(50) NULL

)

AS

-- Returns the first name, last name, job title, and contact type for the specified contact.

BEGIN

DECLARE

@FirstName nvarchar(50),

@LastName nvarchar(50),

@JobTitle nvarchar(50),

@ContactType nvarchar(50);

-- Get common contact information

SELECT

@ContactID = ContactID,

@FirstName = FirstName,

@LastName = LastName

FROM Person.Contact

WHERE ContactID = @ContactID;

SELECT @JobTitle =

CASE

-- Check for employee

WHEN EXISTS(SELECT * FROM HumanResources.Employee e

WHERE e.ContactID = @ContactID)

THEN (SELECT Title

FROM HumanResources.Employee

WHERE ContactID = @ContactID)

-- Check for vendor

WHEN EXISTS(SELECT * FROM Purchasing.VendorContact vc

INNER JOIN Person.ContactType ct

ON vc.ContactTypeID = ct.ContactTypeID

WHERE vc.ContactID = @ContactID)

THEN (SELECT ct.Name

FROM Purchasing.VendorContact vc

INNER JOIN Person.ContactType ct

ON vc.ContactTypeID = ct.ContactTypeID

WHERE vc.ContactID = @ContactID)

-- Check for store

WHEN EXISTS(SELECT * FROM Sales.StoreContact sc

INNER JOIN Person.ContactType ct

ON sc.ContactTypeID = ct.ContactTypeID

WHERE sc.ContactID = @ContactID)

THEN (SELECT ct.Name

FROM Sales.StoreContact sc

INNER JOIN Person.ContactType ct

ON sc.ContactTypeID = ct.ContactTypeID

WHERE ContactID = @ContactID)

ELSE NULL

END;

SET @ContactType =

CASE

-- Check for employee

WHEN EXISTS(SELECT * FROM HumanResources.Employee e

WHERE e.ContactID = @ContactID)

THEN 'Employee'

-- Check for vendor

WHEN EXISTS(SELECT * FROM Purchasing.VendorContact vc

INNER JOIN Person.ContactType ct

ON vc.ContactTypeID = ct.ContactTypeID

WHERE vc.ContactID = @ContactID)

THEN 'Vendor Contact'

-- Check for store

WHEN EXISTS(SELECT * FROM Sales.StoreContact sc

INNER JOIN Person.ContactType ct

ON sc.ContactTypeID = ct.ContactTypeID

WHERE sc.ContactID = @ContactID)

THEN 'Store Contact'

-- Check for individual consumer

WHEN EXISTS(SELECT * FROM Sales.Individual i

WHERE i.ContactID = @ContactID)

THEN 'Consumer'

END;

-- Return the information to the caller

IF @ContactID IS NOT NULL

BEGIN

INSERT @retContactInformation

SELECT @ContactID, @FirstName, @LastName, @JobTitle, @ContactType;

END;

RETURN;

END;

GO

----------------------------------------------------------------------
I executed it in my SQL Server Management Studio Express and I got: Commands completed successfully. I do not know where the result is and how to get the result viewed.  Please help and advise.
 
Thanks in advance,
Scott Chang
 

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Problem About Error Handling In User Defined Function
 

i have a table in which there is a column of type varchar(20), containing a non-standard datetime string, so i wrote a user-defined function to convert this string to datetime value to do further work. the function first reformat the string so that sql server can recognize it and then use cast() function convert the reformatted string to datetime type. 
 
at begining it works fine, but now i found that there might be some corrupted data in this daily-updated table, whos date string is unconvertable. so when i'm trying to process some date containing corrupted records, the string-to-datetime function breaks, reporting it has meet an converting error. i searched msdn and found that the tsql try..catch statement can't be used in user defined function. now i have no idea on how to solve this problem, is there anyone can help me? or is there any way to pick those corrupted rows out so i can throw them away? thanks

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Table-valued User-defined Functions
Is there a way to execute a table-valued user-defined function within SSIS - one that no only returns a "table" of values but also passes in variables to the udf?  Example of it in query form:


DECLARE @Var1 INT

SET @Var1=ID FROM dbo.dbtable WHERE Status = 1

SELECT * FROM udf_Foo(@Var1)

 

Thanks.

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Using A Scalar Valued Function As A Parameter Of A Table Valued Function?
Ok, I'm pretty knowledgable about T-SQL, but I've hit something that seems should work, but just doesn't...
I'm writing a stored procedure that needs to use the primary key fields of a table that is being passed to me so that I can generate what will most likely be a dynamically generated SQL statement and then execute it.
So the first thing I do, is I need to grab the primary key fields of the table.  I'd rather not go down to the base system tables since we may (hopefully) upgrade this one SQL 2000 machine to 2005 fairly soon, so I poke around, and find sp_pkeys in the master table.  Great.  I pass in the table name, and sure enough, it comes back with a record set, 1 row per column.  That's exactly what I need.
Umm... This is the part where I'm at a loss.  The stored procedure outputs the resultset as a resultset (Not as an output param).  Now I want to use that list in my stored procedure, thinking that if the base tables change, Microsoft will change the stored procedure accordingly, so even after a version upgrade my stuff SHOULD still work.  But... How do I use the resultset from the stored procedure?  You can't reference it like a table-valued function, nor can you 'capture' the resultset for use using the  syntax like:
DECLARE @table table@table=EXEC sp_pkeys MyTable
That of course just returns you the RETURN_VALUE instead of the resultset it output.  Ugh.  Ok, so I finally decide to just bite the bullet, and I grab the code from sp_pkeys and make my own little function called fn_pkeys.  Since I might also want to be able to 'force' the primary keys (Maybe the table doesn't really have one, but logically it does), I decide it'll pass back a comma-delimited varchar of columns that make up the primary key.  Ok, I test it and it works great.
Now, I'm happily going along and building my routine, and realize, hey, I don't really want that in a comma-delimited varchar, I want to use it in one of my queries, and I have this nice little table-valued function I call split, that takes a comma-delimited varchar, and returns a table... So I preceed to try it out...
SELECT *FROM Split(fn_pkeys('MyTable'),DEFAULT)
Syntax Error.  Ugh.  Eventually, I even try:
SELECT *FROM Split(substring('abc,def',2,6),DEFAULT)
Syntax Error.
Hmm...What am I doing wrong here, or can't you use a scalar-valued function as a parameter into a table-valued function?
SELECT *FROM Split('bc,def',DEFAULT) works just fine.
So my questions are:
Is there any way to programmatically capture a resultset that is being output from a stored procedure for use in the stored procedure that called it?
Is there any way to pass a scalar-valued function as a parameter into a table-valued function?
Oh, this works as well as a work around, but I'm more interested in if there is a way without having to workaround:
DECLARE @tmp varchar(8000)
SET @tmp=(SELECT dbo.fn_pkeys('MyTable'))
SELECT *
FROM Split(@tmp,DEFAULT)

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User Defined Function: Convert String Value Of Table To Table Object
Does anyone know where to find or how to write a quick user defined fucntionthat will return a table object when passed the string name of the tableobject. The reason why I want dynamicallly set the table name in a storedprocudue WITHOUT using concatination and exec a SQL String.HenceIf @small_int_parameter_previous = 1 then@vchar_tablename = "sales_previous"else@vchar_tablename = "sales"Endselect * from udf_TableLookup(@vchar_tablename )So if I pass 1, that means I want all records from "sales_previous"otherwise give me all records from "sales" (Sales_Previous would last yearssales data for example).udf_TableLookup would I guess lookup in sysobjects for the table name andreturn the table object? I don't know how to do this.I want to do this to avoid having 2 stored procedures..one for current andone for previous year.Please respond to group so others may benfiit from you knowledge.ThanksErik

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In-Line Table-Valued Function: How To Get The Result Out From The Function?
Hi all,
 
I executed the following sql script successfuuly:
 
shcInLineTableFN.sql:

USE pubs

GO

CREATE FUNCTION dbo.AuthorsForState(@cState char(2))

RETURNS TABLE

AS

RETURN (SELECT * FROM Authors WHERE state = @cState)

GO
 
And the "dbo.AuthorsForState" is in the Table-valued Functions, Programmabilty, pubs Database.
 
I tried to get the result out of the "dbo.AuthorsForState" by executing the following sql script:
 
shcInlineTableFNresult.sql:

USE pubs

GO

SELECT * FROM shcInLineTableFN

GO

 
I got the following error message:

Msg 208, Level 16, State 1, Line 1

Invalid object name 'shcInLineTableFN'.

 
Please help and advise me how to fix the syntax

"SELECT * FROM shcInLineTableFN"
and get the right table shown in the output.
 
Thanks in advance,
Scott Chang

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Help Convert MS Access Function To MS SQL User Defined Function
I have this function in access I need to be able to use in ms sql.  Having problems trying to get it to work.  The function gets rid of the leading zeros if the field being past dosn't have any non number characters.For example:TrimZero("000000001023") > "1023"TrimZero("E1025") > "E1025"TrimZero("000000021021") > "21021"TrimZero("R5545") > "R5545"Here is the function that works in access:Public Function TrimZero(strField As Variant) As String   Dim strReturn As String   If IsNull(strField) = True Then      strReturn = ""   Else      strReturn = strField      Do While Left(strReturn, 1) = "0"         strReturn = Mid(strReturn, 2)      Loop   End If  TrimZero = strReturnEnd Function

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Using RAND Function In User Defined Function?
Got some errors on this one...

Is Rand function cannot be used in the User Defined function?
Thanks.

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Table-Valued Function
I am new to writing table-valued user defined function, so this might be a 'Duh' question. I am trying to write a table-valued UDF that has to return multiple rows. How do I do this?
 
Thanks

Mangala

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Trigger On Table-valued Function?
Is there a way to create a trigger directly on an inline or multi-line tablevalue function?I am trying to create a quick-and-dirty application using an Access DataProject front-end with SQL 2000 SP3 EE.Thanks.

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Table Valued Function And Constraints
 

Is it possible to define a constraint for Primary Key on more than 1 column or an alternate index on a column in a return table from an inline table valed function?
 
Example Header:
 

alter FUNCTION [dbo].[fntMetaFrame] (@ii_CompanyID int)

RETURNS @tbl_MetaFrame TABLE ( pk_Key int Identity(1,1) primary key,






ObjectID int ,







Seq int null )



 
I want the primary key to be pk_Key, ObjectID
 
OR
 
I want to add another index on ObjectID.

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How To Join Using A Table-valued Function?
Hi there.    I've hit some gap in my SQL fundementals.   I'm playing with table-valued functions but I can't figure out how to join those results with another table.   I found another way to hit my immediate need with a scalar function, but ultimately I'm going to need to use some approach like this.   What am I misunderstanding here?

The Given Objects:
function Split(stringToSplit, delimiter)   returns table (column:  token)
table Words  (column: Words.word)     -- table of predefined words
table Sentences  (column:  Sentences.sentence)    --  table of sentences; tokens may not be in Words table, etc

The Problems:
1) how do I query a set of Sentences and their Tokens?   (using Split)
2) how do I join tables Sentences and Words using the Split function?

The Attempts:
A)
select word, sentence, token
from Words,
       Sentences,
       dbo.Split(sentence, ' ')      -- implicitly joins Split result with Sentences?
where  word = token

resulting error:   "'sentence' is not a recognized OPTIMIZER LOCK HINTS option."

B)
select word, sentence
from Words, Sentences
where word in (select token from dbo.Split(sentence, ' '))   -- correlated subquery?

resulting error:   "'sentence' is not a recognized OPTIMIZER LOCK HINTS option."

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Indexing Table-valued Function?
I am using a multi-statement table-valued function to assemble data from several tables and views for a report.  To do this, I INSERT data into the first few columns and then use UPDATEs to put data additional data into each row.  Each UPDATE uses a WHERE criteria that identifies a unique row, based on the value of the first few columns. 
 
The problem I'm having is that the UPDATEs are taking forever to execute.  I believe the reason is that the temporary table that's created for the function is not indexed, so each row update requires a complete search of several columns.
 
In other situations I've been able to define one column as a primary key for the temporary table, but in this situation the primary key would have to consist of four columns, which doesn't seem to be allowed in the table definition for the function.
 
Is there any way to create indexes for the temporary tables that are created for multistatement table-valued functions?  I think that would improve the UPDATE performance dramatically.
 
Thanks,
Lee Silverman
JackRabbit Sports

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Can I Use If Statement In A Table Valued Function?
hi,
I am using a function in sql server 2005 like this:
...... myfunction(... @FlagOn int)
.......
begin
return
(

if(@FlagOn = 1)
select * from.......
else
select * form....
)
end
 
But it keeps complaining there is some syntax error around if. What is it?
 
Thanks.
 

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Join With Table Valued Function
Hi,

I want to join a table valued function but function parameter should left joined table's primary key .... this is posible in oracle by pipeline method ..
eg..
SELECT A.Col1,A.Col2,B.Col1,B.Col2
FROM Tab As A LEFT OUTER JOIN TblFunction(A.Pkey) B
ON A.Col1 = B.Col1

any body help me ... thanx in advance..

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How Can I Assign Data Returned From A Stored Procedure Into The Return Table Of A Table Valued Function
Here is the scenario,
I have 2 stored procedures, SP1 and SP2

SP1 has the following code:

declare @tmp as varchar(300)
set @tmp = 'SELECT * FROM
OPENROWSET ( ''SQLOLEDB'', ''SERVER=.;Trusted_Connection=yes'',
''SET FMTONLY OFF EXEC ' + db_name() + '..StoredProcedure'' )'

EXEC (@tmp)

SP2 has the following code:

SELECT *
FROM SP1 (which won't work because SP1 is a stored procedure. A view, a table valued function, or a temporary table must be used for this)

Views - can't use a view because they don't allow dynamic sql and the db_name() in the OPENROWSET function must be used.
Temp Tables - can't use these because it would cause a large hit on system performance due to the frequency SP2 and others like it will be used.
Functions - My last resort is to use a table valued function as shown:

FUNCTION MyFunction
( )
RETURNS @retTable
(
@Field1 int,
@Field2 varchar(50)
)
AS
BEGIN
-- the problem here is that I need to call SP1 and assign it's resulting data into the
-- @retTable variable

-- this statement is incorrect, but it's meaning is my goal
INSERT @retTableSELECT *FROM SP1

RETURN
END

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Help With User Defined Function
I have a UDF that takes my input and returns the next valid business day date. My valid date excludes weekends and holidays.
It works perfect except for one issue. It doesn't check to see if today's date  is a holiday.
I pass a query to sql server like so " select dbo.getstartdate('01/ 10/2007',2)"
It then moves ahead two business days and returns that date.
Here is the current code. Hopefully someone can tell me how to do the holiday check on the current date.
I really don't want to rewrite the whole script .
Code---------------------------------------------------------
SET QUOTED_IDENTIFIER OFF GOSET ANSI_NULLS OFF GO
--DROP FUNCTION GetStartDate
--declare function receiving two parameters ---the date we start counting and the number of business days
CREATE  FUNCTION GetStartDate (@startdate datetime, @days int)   RETURNS datetimeASBEGIN
--declare a counter to keep track of how many days are passingdeclare @counter int
/*Check your business rules.  If 4 business days means you count starting tomorrow, set counter to 0.  If you start counting today, set counter to 1*/set @counter = 1
--declare a variable to hold the ending datedeclare @enddate datetime
--set the end date to the start date.  we'll be -- incrementing it for each passing business dayset @enddate = @startdate
/*Start your loop.While your counter (which was set to 1), is less than or equal to the number of business days increment your end date*/WHILE @counter <= @days
BEGIN
--for each day, we'll add one to the end dateset @enddate = DATEADD(dd, 1, @enddate)
   --If the day is between 2 and 6 (meaning it's a week   --day and the day is not in the holiday table, we'll    --increment the counter   IF (DATEPART(dw, @enddate) between 2 and 6) AND       (@enddate not in           (           select HolidayDate            from tFederalHoliday            where [HolidayYear] = datepart(yyyy,@enddate)         )       )   BEGIN      set @counter = @counter + 1   END
--end the while loopEND
--return the end dateRETURN @enddate
--end the functionEND
GOSET QUOTED_IDENTIFIER OFF GOSET ANSI_NULLS ON GO
---------------------------------------------------------------------------------------------

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User Defined Function
Hi everyone,
    I am tring to pass acomma delimited string to a function  and this function is parsing the string so that I can see individual values so for example I am passing 1,2,3,4,5 as a parameter to my function and I am parsing this string so that I can write something like this
Select * from tableA where userID in(1,2,3,4)
It is working fine. Only problem is if the user passes word 'all' instead of 1,2,3,4 then I have to doSelect * from tableA
My function looks like this.  How can I modify this function if I pass 'all' as a paramater. Any help will be appreciated.CREATE FUNCTION [dbo].[ParseText2File] (@p_text varchar(4000), @p_Delimeter char(1))
RETURNS @results TABLE (id varchar(100))
AS
BEGIN
declare @i1 varchar(200)
declare @i2 varchar(200)
declare @tempResults Table (id varchar(100))
while len(@p_text) > 0 and charindex
(@p_Delimeter, @p_text) <> 0
begin
select @i1 = left(@p_text, charindex(@p_Delimeter, @p_text) - 1)
insert @tempResults select @i1
select @p_text = right(@p_text, len(@p_text) - charindex(@p_Delimeter,@p_text))
end
insert @tempResults select @p_text
insert @results
select *
from @tempResults
return
END
Thanks

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User Defined Function Help!
I am trying to compare the data from one table (shipments) with the data from a view. The point of the function is to match the correct territory with the account depending on the data. Basically, I this deals with accounts that are transfering from one territory to another. The transfers take effect on the first day of the month, retroactive, therefore we need to allocate the sales data to the correct territory in the shipments table. Here is my function. Can someone tell me how I can get this to work and insert a territory ID for the account that has transfered into the shipments table?

CREATE FUNCTION fnShipments ()
RETURNS @Shipments TABLE (AccountID CHAR(10), DateInvoice DateTime, DollarShipments Money, TerritoryID CHAR(10))
AS
BEGIN
INSERT @Shipments (AccountID, DateInvoice, DollarShipments, TerritoryID)
SELECT Shipments.AccountID, Shipments.DateInvoice, DollarShipments, ISNULL((SELECT TerritoryID FROM vwAccountTransfers

WHERE Shipments.AccountID = vwAccountTransfers.AccountID

AND vwAccountTransfers.EffectiveMonth =

(SELECT MIN(EffectiveMonth)
FROM vwAccountTransfers

WHERE Shipments.AccountID = vwAccountTransfers.AccountID
AND DatePart(m,Shipments.DateInvoice) < vwAccountTransfers.EffectiveMonth)),
(SELECT TerritoryID FROM vwAccountTransfers
WHERE Shipments.AccountID = vwAccountTransfers.AccountID
AND vwAccountTransfers.EffectiveMonth Is Null )
) AS Territory
FROM Shipments

ORDER BY Shipments.AccountID, Shipments.DateInvoice;
RETURN
END

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User Defined Function
I need a UDF that will do the following:

User: Will be sending me a datetime e.g '9 Nov 2004 15:00:00'
I want the UDF to do the following for me
Return in hours the difference between what the user has send and now (lets say now = '10 Nov 2004 11:00:00')
So the UDF will return to me 20.
But I dont want 20, I want the UDF to avoid any all hours which are not work related (any time after 16h00
until 8h00 in the morning), so I want this UDF to return 4. That means from '9 Nov 2004 15:00:00' I have calculated
1hr until 16h00 and 3hrs from 8 until 11h00 on '10 Nov 2004 11:00:00'

AGAIN IT MUST NOT CALCULATE WEEKENDS. Lets say '12 Nov 2004 15:00:00' was Friday and now = '15 Nov 2004 11:00:00', I must still
get 4 as a return from UDF

I would also like now to be my getdate(), but it seems like you can't use it in UDF

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RE-User Defined Function (2nd)
Can someone help me please, I have this function and it returns hours between 8h00 and 16h00 during the week

The help I need is, I need to return minutes instead of hours and it must not return any minutes in the following holiday table since we are not working
Holiday
2004-08-09 00:00:00.000
2004-09-24 00:00:00.000
2004-12-16 00:00:00.000
2004-12-26 00:00:00.000
2004-12-25 00:00:00.000
2005-01-01 00:00:00.000


CREATE FUNCTION dbo.fn_CalculateHours
(@DateFrom datetime, @DateTo datetime)
RETURNS int
AS
BEGIN
DECLARE @hFrom int, @hTo int
SET @DateFrom = (CASE DATEPART(weekday,@DateFrom)
WHEN 1 THEN CONVERT(varchar(10),DATEADD(day,1,@DateFrom),120) + ' 08:00:00'
WHEN 7 THEN CONVERT(varchar(10),DATEADD(day,2,@DateFrom),120) + ' 08:00:00'
ELSE @DateFrom
END)
SET @DateTo = (CASE DATEPART(weekday,@DateFrom)
WHEN 1 THEN CONVERT(varchar(10),DATEADD(day,-2,@DateTo),120) + ' 16:00:00'
WHEN 7 THEN CONVERT(varchar(10),DATEADD(day,-1,@DateTo),120) + ' 16:00:00'
ELSE @DateTo
END)
SELECT @hFrom = DATEPART(hour,@DateFrom)
SELECT @hTo = DATEPART(hour,@DateTo)
RETURN ((DATEDIFF(day,@DateFrom,@DateTo) - (DATEDIFF(week,@DateFrom,@DateTo) * 2) - 1) * 8) +
(CASE WHEN @hFrom < 8 THEN 8
WHEN @hFrom > 16 THEN 0
ELSE 16 - @hFrom
END) +
(CASE WHEN @hTo < 8 THEN 0
WHEN @hTo > 16 THEN 8
ELSE @hTo - 8
END)
END

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User Defined Function Help?
I create the following UDF just for learning purposes and I cannot seem to get it to return a value.

Stored Procedure

REATE PROCEDURE usp_GetXSection

@fWidth float,
@fHeight float,
@fResult float OUTPUT

AS
BEGIN
set @fResult = [dbo].[XSECTION](@fWidth, @fHeight)
END
GO


Ane the following UDF


CREATE FUNCTION XSECTION
(@Width float, @Height float)
RETURNS float
AS
BEGIN
RETURN (@Width * @Height)
END


I call it using ADO in a c++ application, but all returns empty

Any ideas? C++ code to follow.

Mike B


void CFormTemplateSetup::OnCalculate()
{
_CommandPtr pCmd(__uuidof(Command));
_ParameterPtr pWidth(__uuidof(Parameter));
_ParameterPtr pHeight(__uuidof(Parameter));
_ParameterPtr pResult(__uuidof(Parameter));

try
{
pCmd->ActiveConnection = GetDocument()->GetConnection();
pCmd->CommandText = _T("usp_GetXSection");
pCmd->CommandType = adCmdStoredProc;

_variant_t vWidth, vHeight;
vWidth.vt = VT_R4;
vHeight.vt = VT_R4;

vWidth.fltVal = 10;
vHeight.fltVal = 10;

pWidth = pCmd->CreateParameter(_T("@fWidth"), adInteger, adParamInput, sizeof(int), vWidth);
pHeight = pCmd->CreateParameter(_T("@fHeight"), adInteger, adParamInput, sizeof(int), vHeight);
pResult = pCmd->CreateParameter(_T("@fResult"), adDouble, adParamOutput, sizeof(float), vtMissing);

pCmd->Parameters->Append(pWidth);
pCmd->Parameters->Append(pHeight);
pCmd->Parameters->Append(pResult);

_variant_t vResult = pResult->Value;

float fArea = pResult->Value.fltVal;
CString csArea;
csArea.Format("Area = %d", fArea);

::AfxMessageBox(csArea);
}
catch(_com_error& e)
{
::AfxMessageBox(e.Description());
}
}

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User Defined Function


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User Defined Function
I only just been given this job as SQL server 7 "administrator". One of the many problems I am facing is trying to find out a way to write user defined functions - one of the millions of things you can do easily with Oracle. I have heard the rumours that SQL 7 does NOT come with "User Defined Functions" as a features. Please tell me this is not true.

And if it is true, please can anyone tell me a way to get around this?

Many thanks in advance

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User Defined Function
Dear friends,

I am a new user for SQL server. Coming from an oracle background, I find it very difficult to live without user defined functions. At the moment, I urgently need to have a function returning an custom-made ID string, so that it can be used in one of my stored procedures. I have heard the rumours that SQL server 7 does NOT support user defined functions, (which SQL 6.5 does). I would be really grateful if anyone can clarify this for me, and if possible, suggest a get-around approach.

Thanks in advance!

Kai

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User Defined SQL Function
How can I create a user defined function in SQL and call it inline from a SQL statement? I need the ability to execute a statement such as:

select myFunc(x,y) from table

I need myFunc(x,y) to return a value, not a recordset and use that value in the select statement. Any and all ideas would be appreciated.

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XML And User Defined Function
Hi,

Please answer to the following questions:
Q1. Is there any way to get text data type from a user defined function ?

Q2. How can result of a select query with "FOR XML RAW" clause be converted into a single string?

-----------
Background of the above 2 questions:

I want to execute a simple select query which besides selecting different columns also calls a user defined function which should execute a select query and return back the result as XML string to the calling select query.

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Need Help With User Defined Function
I am accustomed to doing most of my function work in Access, but the boss would really like it if I could shedule some cubes to do the stuff that takes forever when you run it live.

To that end, I have an Access function that I call to get a field value for a query.  I would like to be able to create an User Defined Function on the SQL server and call that function as a field value in a view.  I have searched the forums and have not really found anything that wants to make sense to me as to how to do this.

The access function is as follows:

Public Function BuyerDeltas(IFSDate As Date, PODate As Date) As Long

    If IFSDate < (Date + 14) Then
        BuyerDeltas = IFSDate - 3 - PODate
    ElseIf IFSDate < (Date + 29) Then
        BuyerDeltas = IFSDate - 7 - PODate
    ElseIf IFSDate > (Date + 28) Then
        BuyerDeltas = IFSDate - 10 - PODate
    Else
        MsgBox "This should not be possible!", vbOKOnly, "Fix It!!!!!!!"
    End If

End Function

The view that this is called from contains the IFSDate and PODate fields and I am able to call the function from the access query, but this is completely different than what I have seen in the help files on SQL.

I would love to be able to keep plugging away at doing this myself, but the boss also is pushing me to get it done and he doesn't want me taking forever to do it.

Any direction would be greatly appreciated!

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---

User Defined Function
Hi,
Iam working on one user defined function which will take week & year as argument and returns sunday date of that particular week in that year. for example if i give (15,2007) as argument it shud give 2007-04-08 as result. Plz anybody help this on this issue.

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---

Table-valued Function Return Error
 

I have this tsql

Declare @IDtable table(id uniqueidentifier, [Value] varchar(50))

Declare @iDoc Int

exec sp_xml_preparedocument @iDoc Output, @Data

insert into @IDtable(id,[Value])

Select *

From OpenXML(@iDoc, '/listing/Item', 2)

With (Id VarChar(40),

Value varchar(20))

exec sp_xml_removedocument @iDoc

 
but when I tried to right table value function of it so I can use it many place with just change paremeter value like this
 

ALTER FUNCTION [dbo].[splitXMLvalue](@editors xml)

RETURNS @etable table(id uniqueidentifier, [name] varchar(50))

AS

BEGIN





Declare @iDoc Int

exec sp_xml_preparedocument @iDoc Output, @Data

insert into @IDtable(id,[Value])

Select *

From OpenXML(@iDoc, '/listing/Item', 2)

With (Id VarChar(40),

Value varchar(20))

exec sp_xml_removedocument @iDoc

--select id as parentId, [Value] as parentValeu from @IDtable

RETURN

END

 
it gave me this error
 
 

Msg 557, Level 16, State 2, Line 1

Only functions and extended stored procedures can be executed from within a function.

 
can any one help me what I'm doing wrongthanks

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---

Multi-statement Table-Valued Function
I'm creating a Multi-statement Table-Valued Function...
 
Is it possible to insert variables into the table? In other words, is it possible
to have something like
 
declare
@value1 varchar(10)
@value2 varchar(10)
 
BEGIN
<do some work on value1 and value2>
INSERT @returningTable
@value1, @value2
 
instead of
 
BEGIN
<do some work on value1 and value2>
INSERT @returningTable
SELECT col1, col2 from T_SOURCE
 
Here's why I want to insert variables...My function needs to return a table which contains a 'partial' incremental key.
I'll go with an example to explain what i have to do
 
Source_table
col1           col2       
Mike          10
Mike          20
Ben           50
John          15
John          25
John          35
 
The table that my function needs to create should look like this
col1          col2        col3
Mike          10          1
Mike          20          2
Ben           50          1
John          15          1
John          25          2
John          35          3
 
I thought of creating a cursor and then looping through it generate col3 and save values of other individual columns in variables. But don't know how to use those variables when inserting records into function table.
 
Any other ideas? I'm caoming from Oracle world, I might be having some strange ideas on how to solve this problem. Any help is appreciated.
 
Thank you.
 
 

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---

Calling The User Defined Function!!!
hai,
the problem is - I have created a userdefined function using SQL 2000
create function  getfulldate (@date varchar(10))returns datetimeasbegindeclare @getfulldate datetime set @getfulldate  = dateadd (mi,55,@date)
return @getfulldateend
and normally we call this in the SQL statements as
select *, dbo.getfulldate('2006-05-03')  from emp
This works fine and what I need was, I need to invoke the user-defined function like
select *, getfulldate('2006-05-03')  from emp    that is, without using "dbo".
If I call in that manner, it gives error as - 'getfulldate' is not a recognized function name.
So, here what is the purpose of dbo and can I call in my desired manner as mentioned above.
anyone guide me, thanks!

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---

User Defined Function Problem
I have  a sproc that passes an ID to a user defined function. I just realized that the udf can only return scalar type value. I need it to return a varchar(10). How can i do this with similiar functionality. Any ideas?  

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---

How To Exec SQL User Defined Function?
Hi,How to exec a SQL user defined function in query analyzer when it accepts parameters.. I know for a stored procedure we can write EXEC nameofstored procedure abc (@abc is the parameter passed).. But How to run a SQL function ?Thanks

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---

Sp_ExecuteSQL In User Defined Function
This is driving me crazy.I need to create a UDF that would return a TRUE/FALSE (bit) value basedon a comparison it does.CREATE FUNCTION dbo.SelectedByApplication(@ApplicationID int,@TableToChecknvarchar(50),@ColumnToComparenvarchar(50),@ValueInTableint)RETURNS BIT ASBEGINDECLARE @SQLNVARCHAR(1000)DECLARE @Param NVARCHAR(500)DECLARE @Result intSET @SQL = N'SELECT @result = COUNT(*) FROM [' + @TableToCheck + '] '+'WHERE [' + @ColumnToCompare + '] = @ValueInTable ANDApplicationID = @ApplicationID'SET @Param = N'@result int out, @ValueInTable int, @ApplicationIDint'EXECUTE sp_executesql @SQL, @Param, @result out, @ValueInTable,@ApplicationIDif @result > 0return 1return 0ENDAll I need the function to do is fill in a column based on whetherthere is a relation between a list of data and the item. I'm trying touse it in the following query:SELECT *, EXEC dbo.SelectedByApplication(4, 'IPM_Application_DataType','DataTypeID', DataTypeID)FROM IPM_DataType DTThe idea is to make this call and then be able to populate a list ofcheckboxes based on the information it returns. It should returnsomething similiar to:Column1 Column2 UDFColumn1 SomeValue 02 OtherValue 13 DifferentValue 04 LastValue 1After reading some of the posts and discovering you can't executedynamic SQL in a UDF I decided to split the function into a functionand stored procedure:CREATE FUNCTION dbo.SelectedByApplication(@ApplicationID int,@TableToChecknvarchar(50),@ColumnToComparenvarchar(50),@ValueInTableint)RETURNS BIT ASBEGINDeclare @Result INTEXEC DynamicCompare @ApplicationID, @TableToCheck, @ColumnToCompare,@ValueInTable, @Resultif(@Result > 0)return 1return 0ENDCREATE PROCEDURE dbo.DynamicCompare(@ApplicationID int,@TableToChecknvarchar(50),@ColumnToComparenvarchar(50),@ValueInTableint,@Resultint out)ASDECLARE @SQLNVARCHAR(1000)DECLARE @Param NVARCHAR(500)SET @SQL = N'SELECT @result = COUNT(*) FROM [' + @TableToCheck + ']' +'WHERE [' + @ColumnToCompare + '] = @ValueInTable ANDApplicationID = @ApplicationID'SET @Param = N'@result int out, @ValueInTable int, @ApplicationIDint'EXECUTE sp_executesql @SQL, @Param, @result out, @ValueInTable,@ApplicationIDI get the same error message about only being able to execute functionsand extended stored procedures in a user defined function.Does anyone have any ideas as to how I can dynamically execute thisquery? The reason I say dynamic is I need this same comparison forabout 25 different tables. Thanks!

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---

Calling User-defined Function Without 'dbo.' -- Possible?
Is it possible to call a user-defined function without prefixing itwith 'dbo.' within a SELECT clause somehow? Just curious; it's not abig issue but just a stylistic one for me.Thanks!Joel Thornton ~ <groups@joelpt.eml.cc>

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---

User Defined Function Issue
I have a user defined function that may be called multiple times inthe same query - here's a rough exampleselect col1, get_random_number(), col2, col3, get_random_number() fromtable1The problem I am having is that I need to have both calls to the userdefined function return the same value if it is called multiple timesfor one row. The values returned from the query would be somethig likethis -John 23456 Engineer Junior 23456Frank 33333 Engineer Senior 33333Tom 80331 Engineer Junior 80331I have thought about having two seperate udf's likeget_random_number() and use_last_random_number(), but I'm not sure howto store the value of the get_random_number() to be used byuse_last_random_number(). These udfs are used in bulk load requests,so performance is a big issue. Any suggestions would be greatlyappreciated. I know the example is kind of silly, but I think itillustrates the problem.

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---

GETDATE() With A User Defined Function
Hi,

I have a requirement where i need to get the current time/date within a Function. As getDate function is a non deterministic function it can not be used with in a function. Your guidence in this regard is greately appreciated.

Regards,
Samcute.

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---

Getdate() In User Defined Function
Hi,

It is possible to use getdate() in userdefined function. If so, how to do the same ?

The following code throws error :

create function function1
return varchar
DECLARE @currYYMM VARCHAR(20)
SET @currYYMM = convert(char(4),getdate(),12)
// Here it says the error 'getdate' can't be used inside functions
...............
.....................

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---

User Defined Function Obsolete
Hi,


sometimes after modifying a UDF (for example adding a column to the output) the statements refer it raise an error like the function has never been modifying , than in the previous example sql server doesn't find the last added column.

If I reapply the "alter" statement script of the function all works fine.It seams there is a sort of internal cache that need to be updated ...

Nobody have never been founding a similar behavior? :confused:


Thx

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---

User Defined Function Problem
Hi,
While i execute the followgin code. it gives error. Please resolve it as while calling the function i want to use getdate() or any other dynamic variable or any select such as

select title from SalesByStore( select admission_Dte from addmission )

It gives error.

--------------------------------------------------------------------------
use pubs
go

createFUNCTION SalesByStore (@storeid datetime)
RETURNS TABLE
AS
RETURN (SELECT top 5 title, qty
FROM sales s, titles t

)
go


select title from SalesByStore(getdate())

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---

Need Help Optizing A User Defined Function
Hi,
I posted a question sometime back about any one has written a function which converts a given date to a a new timezone.

As it turns out I have actually written the function and it is functionally sound.

the issue I am not facing is the performace.

The Algorithm is pretty simple.
step 1
I have create a table called TZ1 which has the TImezoneCODE (PST,EST..), daylightsavingsstart (DATETIME on which the daylight savings start), daylightsavingsend ( end of DLS) and offset (EG -8 for PST, -5 for EST etc)

step 2
I check the timezone and pick out corresponding start and enddate for daylight savings.

Step 3
Depending on where the date lies I create a new date by adding offset to the original datetime (+1) for the new date and then return this new datetime.

As simple as this looks the response time is 16 times than that of a select statement without the function.

Do you see something that I can tune to get a better response time.

Heres my code


================================================== ================================================== ================================================== ================================================== ==================================

CREATE FUNCTION TC3
-- drop function tc3
(@dt datetime, @Src varchar(10), @Dest varchar(10))
Returns datetime
begin
declare @v_src varchar(10)
Declare @v_dest varchar(10)
declare @V_dt datetime
declare @v_newdt datetime
declare @v_year int
declare @v_offset float
declare @v_sd datetime
declare @v_ed datetime

-- select * into TZ1 from TZ1
-- create table #tz1 (fn int)

select @v_year = datepart (year, @dt)

if (@v_year between 2000 and 2004)
begin
-- -------------------
-- PST BEgin
-- -------------------
if (@dest = 'PST')
begin
-- select * from TZ1
select @V_year = datepart (year, @dt)

select @v_offset = offset,
@v_sd = daylightsavingsstart,
@v_ed = daylightsavingsend
from TZ1
where
@V_YEAR = YEAR
and timezonecode = @dest
-- AND @DT between daylightsavingsstart and daylightsavingsend

if (@dt between @v_sd and @v_ed )
begin
-- ( select @v_newdt = dateadd (hh, -9, @dt) )
select @v_newdt = dateadd (hh, CAST( @v_offset as int)-1 , @dt)
end
else
begin
-- ( select @v_newdt = dateadd (hh, -8, @dt) )
select @v_newdt = dateadd (hh, @v_offset, @dt)
end -- if dt between daylight savings

return @v_newdt
end -- @dest=pst end
-- -------------------
-- PST END
-- -------------------
-- -------------------
-- EST BEGIN
-- -------------------

ELSE

if (@dest = 'EST')
begin

select @V_year = datepart (year, @dt)

select @v_offset = offset,
@v_sd = daylightsavingsstart,
@v_ed = daylightsavingsend
from TZ1
where
@V_YEAR = YEAR
and timezonecode = @dest

if (@dt between @v_sd and @v_ed )
begin
-- ( select @v_newdt = dateadd (hh, -9, @dt) )
select @v_newdt = dateadd (hh, CAST( @v_offset as int)-1 , @dt)
end
else
begin
-- ( select @v_newdt = dateadd (hh, -8, @dt) )
select @v_newdt = dateadd (hh, @v_offset, @dt)
end -- if dt between daylight savings


return @v_newdt

end -- @dest=Est end

-- -------------------
-- EST END
-- -------------------

-- -------------------
-- HST BEgin
-- select * from timezones
-- -------------------
else
if (@dest = 'HST')
begin

select @V_year = datepart (year, @dt)

select @v_offset = offset,
@v_sd = daylightsavingsstart,
@v_ed = daylightsavingsend
from TZ1
where
@V_YEAR = YEAR
and timezonecode = @dest

if (@dt between @v_sd and @v_ed )
begin
-- ( select @v_newdt = dateadd (hh, -9, @dt) )
select @v_newdt = dateadd (hh, CAST( @v_offset as int) , @dt)
end
else
begin
-- ( select @v_newdt = dateadd (hh, -8, @dt) )
select @v_newdt = dateadd (hh, @v_offset, @dt)
end -- if dt between daylight savings


return @v_newdt

end -- @dest=Ast end

-- -------------------
-- HST END
-- -------------------

-- -------------------
-- MST BEgin
-- select * from timezones
-- -------------------
else
if (@dest = 'MST')
begin

select @V_year = datepart (year, @dt)

select @v_offset = offset,
@v_sd = daylightsavingsstart,
@v_ed = daylightsavingsend
from TZ1
where
@V_YEAR = YEAR
and timezonecode = @dest

if (@dt between @v_sd and @v_ed )
begin
-- ( select @v_newdt = dateadd (hh, -9, @dt) )
select @v_newdt = dateadd (hh, CAST( @v_offset as int)-1 , @dt)
end
else
begin
-- ( select @v_newdt = dateadd (hh, -8, @dt) )
select @v_newdt = dateadd (hh, @v_offset, @dt)
end -- if dt between daylight savings

return @v_newdt

end -- @dest=Mst end

-- -------------------
-- MST END
-- -------------------

else
return '19990909'
end -- year end

return @v_newdt


end





================================================== ================================================== ================================================== =============================================

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---

User Defined Aggregat-Function
 

Hi,
I'm trying to write an aggregat in c#.It's no problem for sum or multiplication aggregates.
But when I try to use an array to stor the values in it, to compare them with each other,
I get the Message:
 
 

Fehler 1 Type "AggregatClr.AggregatClr" is marked for native serialization, but field "Werte" of type "AggregatClr.AggregatClr" is of type "mscorlib.System.Array" which is a non-value type. Native serialization types can only have fields of blittable types. If you wish to have a field of any other type, consider using different kind of serialization format, such as User Defined Serialization. AggregatClr

And when I try it with User Defined instead of Native:
 
Fehler 1 Type "AggregatClr.AggregatClr" is marked for user-defined serialization, but does not implement the "System.Data.Microsoft.SqlServer.Server.IBinarySerialize" interface. AggregatClr

 
 
What does that means? How can I do that??
Is it possible to use an Array in a User Defined Aggregat??
Thanks
 
Pam

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---

CLR User Defined Aggregate Function
I am trying to modify the C# example given in the "Invoking CLR User-Defined Aggregate Functions" in SQL Server 2005 Books Online.  I want to add a parameter that is used as the list delimeter, instead of the hard coded comma that is used.  I am not a C# programmer and don't know where to begin. Please help!

using System;
using System.Data;
using Microsoft.SqlServer.Server;
using System.Data.SqlTypes;
using System.IO;
using System.Text;

[Serializable]
[SqlUserDefinedAggregate(
    Format.UserDefined, //use clr serialization to serialize the intermediate result
    IsInvariantToNulls = true, //optimizer property
    IsInvariantToDuplicates = false, //optimizer property
    IsInvariantToOrder = false, //optimizer property
    MaxByteSize = 8000) //maximum size in bytes of persisted value
]
public class Concatenate : IBinarySerialize
{
    /// <summary>
    /// The variable that holds the intermediate result of the concatenation
    /// </summary>
    private StringBuilder intermediateResult;

    /// <summary>
    /// Initialize the internal data structures
    /// </summary>
    public void Init()
    {
        this.intermediateResult = new StringBuilder();
    }

    /// <summary>
    /// Accumulate the next value, not if the value is null
    /// </summary>
    /// <param name="value"></param>
    public void Accumulate(SqlString value)
    {
        if (value.IsNull)
        {
            return;
        }

        this.intermediateResult.Append(value.Value).Append(',');  /// I want to change to comma to a variable
    }

    /// <summary>
    /// Merge the partially computed aggregate with this aggregate.
    /// </summary>
    /// <param name="other"></param>
    public void Merge(Concatenate other)
    {
        this.intermediateResult.Append(other.intermediateResult);
    }

    /// <summary>
    /// Called at the end of aggregation, to return the results of the aggregation.
    /// </summary>
    /// <returns></returns>
    public SqlString Terminate()
    {
        string output = string.Empty;
        //delete the trailing comma, if any
        if (this.intermediateResult != null
            && this.intermediateResult.Length > 0)
        {
            output = this.intermediateResult.ToString(0, this.intermediateResult.Length - 1);
        }

        return new SqlString(output);
    }

    public void Read(BinaryReader r)
    {
        intermediateResult = new StringBuilder(r.ReadString());
    }

    public void Write(BinaryWriter w)
    {
        w.Write(this.intermediateResult.ToString());
    }
}

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---

New Column From User Defined Function
I have a user defined function (UDF) that takes 2 parameters.  These parameters will be mapped from OLE DB source column values.  I want the function result to be a new column that will be mapped to an OLE DB destination.  Should this be done using a lookup task, OLE DB command task, or...?  If this is possible I would appreciate a very specific example of how it's done.

BTW I tried using a lookup task with a SQL command before the UDF idea occurred to me and ran into problems using parameters in the SQL query:

Parameter Information cannot be derived from SQL statments. Set parameter information before preparing command.

I've seen the posts about going to the advanced tab and messing with the parameters there but I was hoping using a UDF would be easier, if it can be done.

Thanks.

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---

Using A User Defined Function From A OLE DB Command
 

Hi all, I've tried all types of formats use this function and coming up with errors
the function works fine in SQL so not sure of the proper format to call a function with variaibles
 
have tried
EXEC  EquivalentCase = dbo.udfEquivalentCase(@ConversionValue1= ?,@ConversionValue2 = ?, @CasesSold = ?, @CasesSold=?, @OwnershipCode = ?, @BusSegCode = ? )
 
and
dbo.udfEquivalentCase(?,?,?,?,?)
 
and
select
dbo.udfEquivalentCase(?,?,?,?,?)
 
is there somewhere that provides proper syntax for executing a user defined function from a OLE DB command?
Thanks
 
 
 
 

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---

Exec In User-defined Function
Hi,

How can I do dynamical exec to query in user-defined function? At the end I need to return the result.

Thank's
Alexei

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---

Problem With User Defined Function
I wrote a UDF to get a rolling average based upon a date passed to the UDF.  The error I get is:

Server: Msg 102, Level 15, State 1, Procedure fn_RollAverage, Line 26
Incorrect syntax near ')'.

SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS OFF
GO

 

CREATE FUNCTION fn_RollAverage(@CURVE_DATE AS SMALLDATETIME)
RETURNS @TBLRESULT TABLE
(US0001M_Index AS FLOAT,
US0003M_INDEX AS FLOAT,
US0006M_INDEX AS FLOAT,
US0012M_INDEX AS FLOAT,
usswap2_index AS FLOAT,
usswap3_index AS FLOAT,
usswap4_index AS FLOAT,
usswap5_index AS FLOAT,
usswap6_index AS FLOAT,
usswap7_index AS FLOAT,
usswap8_index AS FLOAT,
usswap9_index AS FLOAT,
usswap10_index AS FLOAT,
usswap11_index AS FLOAT,
usswap12_index AS FLOAT,
usswap13_index AS FLOAT,
usswap14_index AS FLOAT,
usswap15_index AS FLOAT,
usswap20_index AS FLOAT,
usswap25_index AS FLOAT,
usswap30_index AS FLOAT)


AS BEGIN

DECLARE @BEG_DATE AS SMALLDATETIME

SET @BEG_DATE = (@CURVE_DATE - 30)

INSERT @TBLRESULT(
 US0001M_Index,
 US0003M_INDEX,
 US0006M_INDEX,
 US0012M_INDEX,
 usswap2_index,
 usswap3_index,
 usswap4_index,
 usswap5_index,
 usswap6_index,
 usswap7_index,
 usswap8_index,
 usswap9_index,
 usswap10_index,
 usswap11_index,
 usswap12_index,
 usswap13_index,
 usswap14_index,
 usswap15_index,
 usswap20_index,
 usswap25_index,
 usswap30_index)

SELECT
 AVG(US0001M_Index) AS US0001M_Index,
 AVG(US0003M_INDEX) AS US0003M_INDEX,
 AVG(US0006M_INDEX) AS US0006M_INDEX,
 AVG(US0012M_INDEX) AS US0012M_INDEX,
 AVG(usswap2_index) AS usswap2_index,
 AVG(usswap3_index) AS usswap3_index,
 AVG(usswap4_index) AS usswap4_index,
 AVG(usswap5_index) AS usswap5_index,
 AVG(usswap6_index) AS usswap6_index,
 AVG(usswap7_index) AS usswap7_index,
 AVG(usswap8_index) AS usswap8_index,
 AVG(usswap9_index) AS usswap9_index,
 AVG(usswap10_index) AS usswap10_index,
 AVG(usswap11_index) AS usswap11_index,
 AVG(usswap12_index) AS usswap12_index,
 AVG(usswap13_index) AS usswap13_index,
 AVG(usswap14_index) AS usswap14_index,
 AVG(usswap15_index) AS usswap15_index,
 AVG(usswap20_index) AS usswap20_index,
 AVG(usswap25_index) AS usswap25_index,
 AVG(usswap30_index) AS usswap30_index

FROM dbo.LiborSwap
WHERE CURVE_DATE BETWEEN @BEG_DATE AND @CURVE_DATE

RETURN
END

GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO

 

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---

User Defined Function Library
Dave writes "Anybody knows of a good resource for "generic" SQL Server User Defined Functions ?"

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---