Indexes On Table Variable Of Table Valued Function
Jan 6, 2004
Hi there,
Can someone tell me if it is possible to add an index to a Table variable that is declare as part of a table valued function ? I've tried the following but I can't get it to work.
ALTER FUNCTION dbo.fnSearch_GetJobsByOccurrence
(
@param1 int,
@param2 int
)
RETURNS @Result TABLE (resultcol1 int, resultcol2 int)
AS
BEGIN
I have a stored produre. Inside this stored procedure I have table variable with one column. Once the table variable is populated with rows, I would like to pass each value in the table, into a table-valued function. The table-valued function may return any number of rows. I would like all the rows the TVF returns to be returned from the stored procedure as a single result set. I would also like to do this without defining a table variable to hold the results of the table-value function.
Code Snippet
declare @IdTable table ( EmployeeId nvarchar( 16 ) not null ) insert into @IdTable select EmployeeNumber from Employees
/* I need to run this query for every EmployeeId value in @IdTable and return the results from the stored proc as a single result set. */ select * from fn_GetEmployeeById( EmployeeId )
In my stored procedure i have a multi-valued varchar(max) parameter and I wrote a table-valued function that takes the varchar(max) and return a table back to the stored procedure where i inserted into a @table. Just wondering is there a better and faster way of doing this?
ALTER PROCEDURE [dbo].[rpt]
(
@CourtIDs as nvarchar(MAX) -- @CourtIDs = '1231,3432,1234,3421'
) AS
--split CourtIDs into a table DECLARE @tbCourtIDs table(CourtID int NOT NULL PRIMARY KEY) INSERT INTO @tbCourtIDs select * from dbo.Split(@CourtIDs, ',')
i am encountering a problem in a stored procedure when a pass a variable value into a table-valued function. The table-valued function is named getCurrentDriver and has 1 attribute: car-ID.
The syntax is as follows:
select car.id, car.licenceNumber, car.brand, car.model, (select driverName from getCurrentDriver(car.id)) as driverName from car
When I try to compile I get following error on the line of the function: Incorrect syntax near '.'
The database version is SQL Server 2000 SP3.
What am I doing wrong? Is there a workaround for this error?
Hi, I'm having trouble with this multi-statement table-valued function:
ALTER FUNCTION MakeArDetail ( -- Add the parameters for the function here @dateStart DATETIME, @dateEnd DATETIME ) RETURNS @arDetail TABLE ( Insurer VARCHAR(50), NABP INT DEFAULT 0, Claim MONEY DEFAULT 0, Payment MONEY DEFAULT 0, NumRx CHAR(7), PatientName VARCHAR(50), Paid030 MONEY DEFAULT 0, Paid3160 MONEY DEFAULT 0, Paid6190 MONEY DEFAULT 0, Paid91120 MONEY DEFAULT 0, Paid121 MONEY DEFAULT 0 ) AS BEGIN DECLARE @arTemp TABLE ( Insurer VARCHAR(50), NABP INT DEFAULT 0, Claim MONEY DEFAULT 0, Payment MONEY DEFAULT 0, NumRx CHAR(7), PatientName VARCHAR(50), Paid030 MONEY DEFAULT 0, Paid3160 MONEY DEFAULT 0, Paid6190 MONEY DEFAULT 0, Paid91120 MONEY DEFAULT 0, Paid121 MONEY DEFAULT 0 )
INSERT INTO @arTemp SELECT DISTINCT Insurer,NABP,0,0,NumRx,Patient,0,0,0,0,0 FROM Pims; UPDATE @arTemp SET Claim = (SELECT SUM(Pims.AmtReq) FROM Pims WHERE Pims.Insurer = @arTemp.Insurer AND Pims.NABP = @arTemp.NABP AND Pims.NumRx = @arTemp.NumRx );
INSERT INTO @arDetail SELECT * FROM @arTemp RETURN END GO
I get Msg 137, Level 15, State 2, Procedure MakeArDetail, Line 43 Must declare the scalar variable "@arTemp".
I don't understand why SQL thinks @arTemp is a scalar variable which has to be declared. If I don't include the UPDATE command the thing works.
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)
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
I need to return a table of values calculated from other tables. I have about 10 reports which will use approx. 6 different table structures.
Would it be better performance wise to create a physical table in the database to update while calculating using an identity field to id the stored procedure call, return the data and delete the records. For Example:
I need to return a table of values calculated from other tables. I have about 10 reports which will use approx. 6 different table structures.
Would it be better performance wise to create a physical table in the database to update while calculating using an identity field to id the stored procedure call, return the data and delete the records. For Example:
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?
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
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.
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."
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,
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.
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.
I need to create a function which takes a multi-value parameter. When I select more than one item, I get the error that I have too many arguments. Does anybody have a solution?
Or can I create a view and then do a "SELECT * FROM viewName WHERE columnName IN (@param)"?
I am using SQL2005 EE with SP1. The server OS is windows 2K3 sp2
I have a table-valued function (E.g. findAllCustomer(Name varchar(100), gender varchar(1)) to join some tables and find out the result set base the the input parameters.
I have created indexes for the related joinning tables.
I would like to check the performance of a table-valued function and optimize the indexing columns by the execution plan.
I found the graphic explanation only show 1 icon to represent the function performance. I cannot find any further detail of the function. (E.g. using which index in joinning)
If I change the function to stored procedure, I can know whether the T-SQL is using index seek or table scan. I also found the stored procedure version subtree cost is much grether that the table-valued function
I would like to know any configureation in management studio can give more inform for the function performance?
I have a table-valued function in mssql 2005 as below: ALTER FUNCTION fn_test{ @test nvarchar(1000)}RETURNS@TEMP TABLE{ test nvarchar(1000)}ASBEGIN INSERT INTO @TEMP SELECT @test RETURNEND Everytime, I passed in chinese character (@test), such as 測驗, the function will return ????. What should I do for the table-valued function, so that the chinese character can be passed in? Please help. Note: I can search and get the chinese characters if I use stored procedures; and the columns in the tables can store chinese chararcters as well. Only table-valued function is not working with the chinese characters. Is it a bug from MSSQL 2005?
I am creating a function where I want to pass it parameters and then use those parameters in a select statement. When I do that it selects the variable name as a literal not a column. How do I switch that context.
Query:
ALTER FUNCTION [dbo].[ufn_Banner_Orion_Employee_Comparison_parser_v2] ( @BANNER_COLUMN AS VARCHAR(MAX), @ORION_COLUMN AS VARCHAR(MAX) ) RETURNS @Banner_Orion_Employee_Comparison TABLE
[code]....
Returns:
I execute this:
select * from ufn_Banner_Orion_Employee_Comparison_parser_v2 ('a.BANNER_RANK' , 'b.[rank]')
I have a recursive CTE on an inline table valued function. I need to set the MAXRECURSION option on the CTE, but SQL Server is complaining with "Incorrect syntax near the keyword 'OPTION'".
It works fine on non-inline function. I couldn't find any documentation indicating this wasn't possible.
I can use the MAXRECURSION option in call to the function
SELECT * FROM MyFunction () OPTION ( MAXRECURSION 0 )
but that means that the user needs to know the "MyFunction" uses recursive CTE, which defeats the purpose of the abstraction.
I'm running 2014 enterprise and getting an error on this form of a query...it says the multi part identifier "mns.col3" could not be bound. I'm aware that a cross apply would be more appropriate but i'm just prototyping and probably going to move to a set based approach anyway.The udf returns a table.
select mns.col1, mns.col2 from table1 mns left join dbo.udf_udf1(@firstofmonth,@lastofmonth, mns.col3) x on 1=1
Hi, I am trying to write a table-valued function in SQL Server 2005 (SP1) to return all active directory groups a user belongs too, using managed code (VB.NET).
Testing the code with a simple winform I get the list of groups in about 0.4 seconds. However the table-valued function takes upwards of 17 seconds to run! Is this normal for managed code in SQL Server?
Imports SystemImports System.TextImports System.DataImports System.Data.SqlClientImports System.Data.SqlTypesImports System.CollectionsImports System.DirectoryServicesImports Microsoft.SqlServer.ServerPartial Public Class UserDefinedFunctions#Region "Constants" ''' <summary> ''' The connection string for Active Directory. ''' </summary> 'Private Const LDAP_CONNECTION_STRING As String = "LDAP://<My LDAP connection string> ''' <summary> ''' The LDAP search filter need to find a user in Active Directory. ''' </summary> 'Private Const LDAP_SEARCH_FILTER_USER As String = "(&(objectclass=user)(objectcategory=person)(sAMAccountName={0}))"#End Region ''' <summary> ''' Gets all active directory groups for the user. ''' </summary> ''' <returns>All dataset permissions for the user.</returns> <Microsoft.SqlServer.Server.SqlFunction(DataAccess:=DataAccessKind.None, FillRowMethodName:="udfUserActiveDirectoryGroupsFill", TableDefinition:="GroupID NVARCHAR(100)")> _ Public Shared Function udfUserActiveDirectoryGroups(ByVal userName As String) As IEnumerable ' Setup the active directory search. Dim searcher As New DirectorySearcher(LDAP_CONNECTION_STRING) searcher.Filter = String.Format(LDAP_SEARCH_FILTER_USER, userName) searcher.SearchScope = SearchScope.Subtree searcher.PropertiesToLoad.Add("distinguishedname") ' Run the active directory search. Dim result As SearchResult = searcher.FindOne() Dim userEntry As DirectoryEntry = result.GetDirectoryEntry() Dim userGroups As New ArrayList GetActiveDirectoryGroupsForEntry(userEntry, userGroups) Return userGroups End Function Public Shared Sub udfUserActiveDirectoryGroupsFill(ByVal source As Object, ByRef GroupID As SqlChars) GroupID = New SqlChars(CType(source, String)) End Sub ''' <summary> ''' Recursively gets the active directory groups for the directory entry. ''' </summary> ''' <param name="entry">The active directory entry.</param> ''' <param name="groups">The list of groups.</param> Private Shared Sub GetActiveDirectoryGroupsForEntry(ByVal entry As DirectoryEntry, ByVal groups As ArrayList) For i As Integer = 0 To entry.Properties("memberOf").Count - 1 Dim memberEntry As New DirectoryEntry("LDAP://" + entry.Properties("memberOf")(i).ToString()) groups.Add(memberEntry.Properties("sAMAccountName")(0).ToString()) GetActiveDirectoryGroupsForEntry(memberEntry, groups) Next End SubEnd Class
I'm trying to call a Stored Procedure from a Inline Table-Valued Function. Is it possible? If so can someone please tell me how? And also I would like to call this function from a view. Can it be possible? Any help is highly appreciated. Thanks
For code reuse, I am trying to get a table valued function to return users of a given AD group name. I can easily get this with hard-coding the group name. But because OpenQuery wont accept parameters, I can't insert my group name there. And because functions can't call dynamic SQL, I can't do it via dynamic sql. I have seen people do it with CLR, but I rather not go that route. I can use a stored procedure + cursor and iterate through each group and store the results into real tables and create a cache, but I rather query Active Directory itself to save space, but I rather do the caching then the CLR. Any approach I am missing on how to do this?
The following works fine:
SELECT DISTINCT sAMAccountName FROM OPENQUERY(ADSI, 'SELECT sAMAccountName, sn FROM ''LDAP://OU=SomeOU,OU=SomeOtherOU,DC=SomeDC,DC=SomeOtherDC'' WHERE objectCategory=''Person'' AND objectClass=''USER'' AND memberOf=''CN=SomeGroupName,OU=SomeOU,OU=SomeOtherOU,DC=SomeDC,DC=SomeOtherDC''') a WHERE sn IS NOT NULL
The following gives me the error:
Invalid use of a side-effecting operator 'EXECUTE STRING' within a function. CREATE FUNCTION [dbo].queryADGroupMembers ( @group nvarchar(255) ) RETURNS @rtnTable TABLE
My overarching goal is to generate sets of random Symptom records for each Enrollee in a drug study, so that for each cycle (period of time), the code will insert a random number of random records for each enrollee.
I'm trying to return a number of random records from a table, but inside a table-valued function... (which could be my problem).
CREATE FUNCTION dbo.ufn_GetTopSymptoms ( @enrollID INT , @CTCVersion VARCHAR(20) , @NumRecords INT ) RETURNS TABLE
[Code] ....
But that ORDER BY NEWID() clause is illegal apparently, because here's the error it throws:
Msg 443, Level 16, State 1, Procedure ufn_GetTopSymptoms, Line 13 Invalid use of a side-effecting operator 'newid' within a function.
I was hoping I could return a set of enrollmentIDs and then use CROSS APPLY to generate a random set of records for each enrollmentID... is this not possible with APPLY? I was trying to avoid using a cursor...
The idea is basically to create all the Symptom records for all the patients in treatment cycle at once by using Enrollee OUTER APPLY dbo.ufn_GetTopSymtoms(dbo.Enrollment.EnrolleeID)
but that's clearly not working. Is there a way to do this without resorting to a cursor?
I'm attempting to convert some INSERT-EXEC structures into table-valued functions because the procedures are deeply nested and INSERT-EXEC doesn't like nesting (Error 3915: Cannot use the ROLLBACK statement within an INSERT-EXEC statement)
The procedure has a single select statement, so I created an inline table-valued function. When I ran it with sample data, I received this error (yes, twice):
Msg 0, Level 11, State 0, Line 0 A severe error occurred on the current command. The results, if any, should be discarded. Msg 0, Level 20, State 0, Line 0 A severe error occurred on the current command. The results, if any, should be discarded.
After ruling out obvious mistakes, I started to deconstruct the select statement with its CTE and TVP. The result is the following, built in my local sandbox database:
CREATE TYPE test_list AS TABLE(a int); GO CREATE FUNCTION test_function (@p int, @theTable test_list READONLY) RETURNS TABLE AS RETURN ( WITH cte AS (SELECT a FROM @theTable) SELECT cte.a FROM cte); GO DECLARE @t test_list; INSERT @t VALUES(1); SELECT * FROM test_function(1, @t);
When I run this, I get the same error as noted above. I'm running on version 10.50.4000.0, Developer Edition. (2008 R2 SP2)
The function above does just about nothing and has redundancies because I stripped the actual function down to the essential elements to cause the error. The essential elements are:
- One of the parameters is a table-valued parameter (the UDTT definition does not seem to matter)
- The SELECT statement has a CTE
- The TVP is accessed within the CTE
- The outer FROM clause references the CTE
- There is also a scalar parameter on the function (scalar type does not seem to matter).
- The scalar parameter precedes the TVP in the parameter list.
So I have an easy work-around: put the TVP first in the parameter list.
