Sp_ExecuteSQL In User Defined Function

Jul 23, 2005

This is driving me crazy.

I need to create a UDF that would return a TRUE/FALSE (bit) value based
on a comparison it does.

CREATE FUNCTION dbo.SelectedByApplication
(
@ApplicationID int,
@TableToChecknvarchar(50),
@ColumnToComparenvarchar(50),
@ValueInTableint
)
RETURNS BIT AS
BEGIN

DECLARE @SQLNVARCHAR(1000)
DECLARE @Param NVARCHAR(500)
DECLARE @Result int


SET @SQL = N'SELECT @result = COUNT(*) FROM [' + @TableToCheck + '] '
+
'WHERE [' + @ColumnToCompare + '] = @ValueInTable AND
ApplicationID = @ApplicationID'
SET @Param = N'@result int out, @ValueInTable int, @ApplicationID
int'


EXECUTE sp_executesql @SQL, @Param, @result out, @ValueInTable,
@ApplicationID

if @result > 0
return 1
return 0
END

All I need the function to do is fill in a column based on whether
there is a relation between a list of data and the item. I'm trying to
use it in the following query:

SELECT *, EXEC dbo.SelectedByApplication(4, 'IPM_Application_DataType',
'DataTypeID', DataTypeID)
FROM IPM_DataType DT

The idea is to make this call and then be able to populate a list of
checkboxes based on the information it returns. It should return
something similiar to:

Column1 Column2 UDFColumn
1 SomeValue 0
2 OtherValue 1
3 DifferentValue 0
4 LastValue 1

After reading some of the posts and discovering you can't execute
dynamic SQL in a UDF I decided to split the function into a function
and stored procedure:

CREATE FUNCTION dbo.SelectedByApplication
(
@ApplicationID int,
@TableToChecknvarchar(50),
@ColumnToComparenvarchar(50),
@ValueInTableint
)
RETURNS BIT AS
BEGIN

Declare @Result INT

EXEC DynamicCompare @ApplicationID, @TableToCheck, @ColumnToCompare,
@ValueInTable, @Result

if(@Result > 0)
return 1
return 0
END

CREATE PROCEDURE dbo.DynamicCompare
(
@ApplicationID int,
@TableToChecknvarchar(50),
@ColumnToComparenvarchar(50),
@ValueInTableint,
@Resultint out
)
AS
DECLARE @SQLNVARCHAR(1000)
DECLARE @Param NVARCHAR(500)

SET @SQL = N'SELECT @result = COUNT(*) FROM [' + @TableToCheck + ']
' +
'WHERE [' + @ColumnToCompare + '] = @ValueInTable AND
ApplicationID = @ApplicationID'
SET @Param = N'@result int out, @ValueInTable int, @ApplicationID
int'

EXECUTE sp_executesql @SQL, @Param, @result out, @ValueInTable,
@ApplicationID

I get the same error message about only being able to execute functions
and extended stored procedures in a user defined function.

Does anyone have any ideas as to how I can dynamically execute this
query? The reason I say dynamic is I need this same comparison for
about 25 different tables. Thanks!

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Code---------------------------------------------------------
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BEGIN
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Stored Procedure

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

AS
BEGIN
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END
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Ane the following UDF


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

try
{
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End Function

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

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Hi,
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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
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Step 3
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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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Incorrect syntax near ')'.

SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS OFF
GO



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RETURNS @TBLRESULT TABLE
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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)


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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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Oct 4, 2006

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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Feb 18, 2008



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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Oct 14, 2007

 Hi, I have a stored procedure that calls a scalar function.  It works fine on my development database, but on my production database, I get this error when trying to execute the procedure: Cannot find either column "dbo" or the user-defined function or aggregate "dbo.MyFunction", or the name is ambiguous. However, I am able to execute the function outside of the procedure like this: select dbo.MyFunction(0, 0)  Anyone have idea? I can't figure it out.    

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Dec 24, 2007

Dear all
I wants to run sql server user defined function when linked two server.
 
I have linked two sql server.There is one function called getenc().This function created on first server.What i want.I wants to run this user defined function on the second sql server. can any one help me?
 
Regards
Jerminxxx

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Aug 9, 2005

Dear all,After reading the Book Online, I am still confued by when to use store proc or user-defined function. The most obvious different for me is that 1. UDF can return a table    eg select * from dbo.UDF(a, b , c) In real word application, what factor should i consider?Also, any debug tools in sql server ?Ad_dee

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How Can I Get Current Year In The User Defined Function.

Nov 17, 2005

I have a user defined function in datebase SQL 2000. function looks like
create function Getcurrentdate(@month int, @day int) returns smalldatetimebegin
declare date1 as smalldatetime--get current year --convert month, day and year into current date. then return
return date1end
my problem was , after using getDate(). I get error meassage which is "can'not use getDate() inside user function"How can I get current year in the user defined function. Thanks

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Is It Possible To Extend SQL-TRANSACT With User-defined Function

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