Dynamic Stored Procedures
Jun 9, 1999
I open a recordset using a string to call a stored procedure. In the stored
procedure I create a temporary table and use the exec function to fill the
table. I then select * the table and drop the temporary table. The problem
is the recordset will not even open. My script keeps getting a "The
operation requested by the application is not allowed if the object is
closed. " error when points to the line after rs.Open is called. This line
checks for rs.EOF. When I Response.Write the SQL statement and paste this
into an ISQL session I get the output I am looking for. The only difference
is above the records I get a "# row(s) affected" which maybe from the
Insert. Does anyone know what is wrong here?
David Stanek
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Mar 18, 2004
REF: http://msdn.microsoft.com/netframework/default.aspx?pull=/library/en-us/dndotnet/html/storedprocsnetdev2.asp
It seems dynamic SQL is just as efficient as stored procedures in terms SQL Server caching. Any comments?
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Jun 12, 2006
Hello, I'm trying to create a Stored Procedure who receives the table name as a parameter, then uses a cursor to obtain every column name and then builds a string like SELECT col1, col2, ... from TABLE
In fact that would be the same as SELECT * FROM table; but I can't do this, because I'll be using this stored procedure to loop through many tables that has different quantity of columns with a DTS, and if a specify the *, then the DTS wouldn't let me do the select with tables with different quantity of fields.
Could you help me please, because my code isn't working:
CREATE PROCEDURE dbo.stp_Test
(
@tablename AS VARCHAR(50)
)
AS
DECLARE @columnname varchar(50)
DECLARE @strsql Nvarchar(500)
DECLARE @query varchar(4000)
SET NOCOUNT ON
DECLARE c1 CURSOR FOR
SELECT column_name FROM information_schema.columns
WHERE table_name = @tablename
OPEN c1
FETCH NEXT FROM c1 INTO @columnname
WHILE @@fetch_status = 0
BEGIN
IF (@strsql is null)
BEGIN
SET @strsql=@columnname
END
ELSE
BEGIN
SET @strsql = @strsql + ',' + @columnname
END
FETCH NEXT FROM c1 INTO @columnname
END
CLOSE c1
DEALLOCATE c1
SELECT @query = 'SELECT ' + @strsql + ' FROM ' + @tablename
EXEC @query
SET NOCOUNT OFF
GO
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Aug 1, 2006
Okay, I have sort of a peculiar permissions question I am wondering if someone can help me with. I'm suspect there's a simple answer, but I'm unaware of it. Basically, here's the scenario...
I have a CLR stored procedure which does some dynamic SQL building based on values sent in via XML. It's a CLR stored procedure using XML because I want to build a parameterized statement (to guard against SQL Injection) based on a flexible number of parameters which are basically passed in the XML.
The dynamic SQL ends up reading from a table I'll call TableX and I actually discovered an (understandable) quirk with security.
Basically, the connection context is impersonating a low-privilaged Windows account ("UserX") coming from a .NET application. UserX has no permission to the table referenced in the dynamic SQL and because of the dyanmic nature of the query, the stored procedure apparently adopts the security context of UserX. Naturally, this throws a security exception saying UserX has no SELECT permission on TableX.
Now, I can give UserX read permission to the table in question to get things running, but one of the points of using stored procedures is to defer security to the procedure level vs. configuration for tables or columns.
So in striving toward my ideal of security at the procedure level, my question is what is the best way to allow minimum privilege in this case?
I thought about having the internals of the CLR stored procedure run under a different (low-privalaged) security context, but I am wondering if there's an alternate configuration that may use the same connection, and be as secure, but simpler.
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Oct 7, 2006
Hi there,
I would like to know how to create Dynamic stored procedure which defines TableName as a Variable and return all fields from this Table.
And also how to Dynamicly create a sp_GetNameByID (for instance)
using vars only.
Thanks
It would be very helpfull to me if you could give links of Dynamic SQL tutorials from which i can learn.
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Feb 13, 2008
Hi!
I have an integration code write in T-SQL. It´s a TRIGGER that when some data is INSERTED on a specific table, verify the first caracter of a nvarchar on the column named "idCli", and depending on their value, call one specific stored procedure that will execute some data modifications to fit on other table on a diferent database.
Each client of mine can have only one table that start the trigger on APP1, but can have many instances of SQL for different codes.
Until now, what we do is:
Find how many different databases (and their names) a specific client have to APP2 and write a specific stored procedure for each database, using the names (that are always different...). We use a template of course, but this don't change the fact the we must correct many times the database name on the different stored procedures.
This increse the time and chance of errors on installing the system.
The first way we think for solve this question is using dinamic sql, like this code:
Code Snippet
CREATE TRIGGER T01
ON [dbo].[table1]
FOR INSERT, UPDATE
AS
-- some code that put values in @v1 and @V2...
IF @v1 = 1
EXEC fct ('DB1..Tabela1', @V2)
ELSE
EXEC fct ('DB2..Tabela1', @V2)
GO
CREATE PROCEDURE fct (@table_name nvarchar(50), @valor int)
AS
EXEC ('INSERT INTO '+@table_name+' (valor) VALUES ('+@valor+')')
GO
This type of code has the advantege (we think) to permit us change only the TRIGGER, and use always the same number of procedures on install.
Is there any security problem to do this type of code?
Even if the @table_name and @valor are determined by the program?
In case of yes, how can I do something like this, or, if this is not possible, how can I "automate" the creation of the procedures with a variable number of choices (like 2 different tables for client A, 5 for client B, etc)?
Thanks in advance
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Mar 23, 2006
I want to use parameters within a stored procedure to generate dynamic columns using SUSER_SNAME as the name for the column that I want to dynaically select (e.g. Select @SUSER_SNAME, First, Last, City FROM MyTable). I have been able to successfully use parameters in the WHERE clause within a stored procedure but haven't been able to find a way to use parameters for column names let alone to tie the parameter value back to SUSER_SNAME.
Any insight would be greatly appreciated!
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May 7, 2004
Hi, all:
Kind of new to reporting services. I've been playing around with SQL Reporting Services and was wondering if anyone knows how to populate the fields from a dataset in the Report Designer from a stored procedure that uses dynamic SQL. I've had success with non-dynamic stored procedures and inline queries, but am unable to generate fields when the sp contains dynamic SQL. I've tried defining the fields manually, but when I execute the report I receive errors that the fields are undefined.
Any help would be greatly appreciated!
Thanks
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Oct 17, 2007
Hello,
I was in a confusion that is Stored Procedures are really fast ? I have a .NET application where I am using Stored Procedures. But recently I cam through this link http://weblogs.asp.net/fbouma/archive/2003/11/18/38178.aspx which describes Stored Procedures are bad and it won't give any performance difference. What is the truth ? Will it give good performance that passing query from the application ?
Please make it clear
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Mar 12, 2008
Im reviewing my stored procedures for a new application and got to thinking about protecting against sql injection. I think im pretty safe since im using stored procedures and none of them use any 'exec' commands within them, but im not sure.
I was reading this article, and again all the examples that list a stored procedure, have an 'exec' command somewhere that is the culprit. So, in my case lets say I was doing something like this:
Im generally using regularexpression validation controls on the client side of the application and limiting the max length of the input there as well.
Am I safe, or do I need further input checking within the procedure ?
Code Snippet
CREATE PROCEDURE [dbo].[get_Uploads]
@app varchar(50)
--Init variables
SET @error_number = 0
BEGIN TRY
SELECT [Logid],[Filename],[Label],[UploadDate],[App]
FROM UploadLog au
WHERE [App]=@app
END TRY
BEGIN CATCH
SET @error_number = -2
END CATCH
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Jul 23, 2005
I want to know the differences between SQL Server 2000 storedprocedures and oracle stored procedures? Do they have differentsyntax? The concept should be the same that the stored proceduresexecute in the database server with better performance?Please advise good references for Oracle stored procedures also.thanks!!
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Sep 30, 2006
Hi,
This Might be a really simple thing, however we have just installed SQL server 2005 on a new server, and are having difficulties with the set up of the Store Procedures. Every time we try to modify an existing stored procedure it attempts to save it as an SQL file, unlike in 2000 where it saved it as part of the database itself.
Thank you in advance for any help on this matter
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Mar 24, 2007
I have a Stored Procedure for processing a Bill of Material.
One column on the Assembly Table is a Function Name that contains some busniess rules.
OK, now I'm doing a Proof of Concept and I'm stumped.
Huuuuh!
I will ultimately have about 100 of these things. My plan was using Dynamic SQL to go execute the function.
Note: The function just returns a bit.
So; here's what I had in mind ...
if isnull(@FnNameYN,'') <> ''
exec spinb_CheckYN @FnNameYN, @InvLineID, @FnBit = @FnBit output
CREATE PROCEDURE dbo.spinb_CheckYN
@FnNameYN varchar(50),
@InvLineID int,
@FnBit bit output
AS
declare @SQL varchar(8000)
set @SQL = '
if dbo.' + @FnNameYN + ' (' + convert(varchar(31),@InvLineID) + ')) = 1
set @FnBit = 1
else
set @FnBit = 0'
exec (@SQL)
GO
Obviously; @FnBit is not defined in @SQL so that execution will not work.
Server: Msg 137, Level 15, State 1, Line 4
Must declare the variable '@FnBit'.
Server: Msg 137, Level 15, State 1, Line 5
Must declare the variable '@FnBit'.
So; is there a way to get a value out of a Dynamic SQL piece of code and get that value INTO my OUTPUT variable?
My many thanks to anyone who can solve this riddle for me.
Thank You!
Sigh: For now, it looks like I'll have a huge string of "IF" statements for each business rule function, as follows:
Hopefully a better solution comes to light.
------ Vertical Build1 - Std Vanes -----------
if @FnNameYN = 'fnb_YN_B1_14'
BEGIN
if dbo.fnb_YN_B1_14 (convert(varchar(31),@InvLineID) ) = 1
set @FnBit = 1
else
set @FnBit = 0
END
------ Vertical Build1 - Scissor Vanes -----------
if @FnNameYN = 'fnb_YN_B1_15'
BEGIN
if dbo.fnb_YN_B1_15 (convert(varchar(31),@InvLineID) ) = 1
set @FnBit = 1
else
set @FnBit = 0
END
.
.
.
etc.
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Nov 6, 2007
Using SQL 2005, SP2. All of a sudden, whenever I create any stored procedures in the master database, they get created as system stored procedures. Doesn't matter what I name them, and what they do.
For example, even this simple little guy:
CREATE PROCEDURE BOB
AS
PRINT 'BOB'
GO
Gets created as a system stored procedure.
Any ideas what would cause that and/or how to fix it?
Thanks,
Jason
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May 22, 2007
I'm having problems with dynamic sql within a funtion that returns a table. Here's an example, it compiles but on running gives me an error allong the lines that calling sub procedures is not permitted. I'm assuming the problem is inserting into teh return table, can it be done? should I declare @MyTable as a parameter using the sp_executesql call? or have I completely missed something?
Regards,
Andrew
Example routine, not that far from what my actual code looks like.
CREATE FUNCTION GetMyRecords
(
@date DateTime
)
RETURNS
@MyTable TABLE
(
RECORDID BigInt
)
AS
BEGIN
DECLARE @SQL Varchar(1000)
DECLARE @dayOfWeek int
DECLARE @fld varchar(10)
SET @dayOfWeek = DatePart( dw, @date )
if( @dayOfWeek = 1 )
@fld = "SUNDAY"
if( @dayOfWeek = 2 )
@fld = "MONDAY"
etc...
Set @SQL = N'Insert into @MyTable Select MyTestTable.ID from MyTestTable Where MyTestTable.' + @fld + ' > 0 '
Exec( @SQL )
RETURN
END
GO
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Jun 29, 2015
The requirement is create a sql script(1 proc or cursor) which will create multiple procedures dynamically.
Table A
Col1Â
Col2
A
Alpha
For Example: If table A has 3 rows(distinct) so 3 procedures will be created dynamically.
Result:Â
1 PROC_A_ALPHA
2Â PROC_B_BETA
3Â PROC_C_charlie
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Apr 29, 2008
How do I search for and print all stored procedure names in a particular database? I can use the following query to search and print out all table names in a database. I just need to figure out how to modify the code below to search for stored procedure names. Can anyone help me out?
SELECT TABLE_SCHEMA + '.' + TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
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Jun 13, 2007
Seems like I'm stealing all the threads here, : But I need to learn :) I have a StoredProcedure that needs to return values that other StoredProcedures return.Rather than have my DataAccess layer access the DB multiple times, I would like to call One stored Procedure, and have that stored procedure call the others to get the information I need. I think this way would be more efficient than accessing the DB multiple times. One of my SP is:SELECT I.ItemDetailID, I.ItemDetailStatusID, I.ItemDetailTypeID, I.Archived, I.Expired, I.ExpireDate, I.Deleted, S.Name AS 'StatusName', S.ItemDetailStatusID, S.InProgress as 'StatusInProgress', S.Color AS 'StatusColor',T.[Name] AS 'TypeName', T.Prefix, T.Name AS 'ItemDetailTypeName', T.ItemDetailTypeID FROM [Item].ItemDetails I INNER JOIN Item.ItemDetailStatus S ON I.ItemDetailStatusID = S.ItemDetailStatusID INNER JOIN [Item].ItemDetailTypes T ON I.ItemDetailTypeID = T.ItemDetailTypeID However, I already have StoredProcedures that return the exact same data from the ItemDetailStatus table and ItemDetailTypes table.Would it be better to do it above, and have more code to change when a new column/field is added, or more checks, or do something like:(This is not propper SQL) SELECT I.ItemDetailID, I.ItemDetailStatusID, I.ItemDetailTypeID, I.Archived, I.Expired, I.ExpireDate, I.Deleted, EXEC [Item].ItemDetailStatusInfo I.ItemDetailStatusID, EXEC [Item].ItemDetailTypeInfo I.ItemDetailTypeID FROM [Item].ItemDetails IOr something like that... Any thoughts?
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May 13, 2008
Greetings:
I have MSSQL 2005. On earlier versions of MSSQL saving a stored procedure wasn't a confusing action. However, every time I try to save my completed stored procedure (parsed successfully ) I'm prompted to save it as a query on the hard drive.
How do I cause the 'Save' action to add the new stored procedure to my database's list of stored procedures?
Thanks!
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Apr 7, 2006
We recently upgraded to SQL Server 2005. We had several stored procedures in the master database and, rather than completely rewriting a lot of code, we just recreated these stored procedures in the new master database.
For some reason, some of these stored procedures are getting stored as "System Stored Procedures" rather than just as "Stored Procedures". Queries to sys.Objects and sys.Procedures shows that these procs are being saved with the is_ms_shipped field set to 1, even though they obviously were not shipped with the product.
I can't update the sys.Objects or sys.Procedures views in 2005.
What effect will this flag (is_ms_shipped = 1) have on my stored procedures?
Can I move these out of "System Stored Procedures" and into "Stored Procedures"?
Thanks!
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Apr 23, 2008
Hello friends......How are you ? I want to ask you all that how can I do the following ?
I want to now that how many ways are there to do this ?
How can I call one or more stored procedures into perticular one Stored Proc ? in MS SQL Server 2000/05.
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Mar 26, 2008
Hello
I'm start to work with SSIS.
We have a lot (many hundreds) of old (SQL Server2000) procedures on SQL 2005.
Most of the Stored Procedures ends with the following commands:
SET @SQLSTRING = 'SELECT * INTO ' + @OutputTableName + ' FROM #RESULTTABLE'
EXEC @RETVAL = sp_executeSQL @SQLSTRING
How can I use SSIS to move the complete #RESULTTABLE to Excel or to a Flat File? (e.g. as a *.csv -File)
I found a way but I think i'ts only a workaround:
1. Write the #Resulttable to DB (changed Prozedure)
2. create data flow task (ole DB Source - Data Conversion - Excel Destination)
Does anyone know a better way to transfer the #RESULTTABLE to Excel or Flat file?
Thanks for an early Answer
Chaepp
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Jun 16, 2007
Hi,
Do you know how to write stored procedures inside another stored procedure in MS SQL.
Create procedure spMyProc inputData varchar(50)
AS
----- some logical
procedure spMyProc inputInsideData varchar(10)
AS
--- some logical
--- go
-------
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May 8, 2008
I am writing a set of store procedures (around 30), most of them require the same basic logic to get an ID, I was thinking to add this logic into an stored procedure.
The question is: Would calling an stored procedure from within an stored procedure affect performance? I mean, would it need to create a separate db connection? am I better off copying and pasting the logic into all the store procedures (in terms of performance)?
Thanks in advance
John
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Nov 1, 2007
Hi all - I'm trying to optimized my stored procedures to be a bit easier to maintain, and am sure this is possible, not am very unclear on the syntax to doing this correctly. For example, I have a simple stored procedure that takes a string as a parameter, and returns its resolved index that corresponds to a record in my database. ie
exec dbo.DeriveStatusID 'Created'
returns an int value as 1
(performed by "SELECT statusID FROM statusList WHERE statusName= 'Created')
but I also have a second stored procedure that needs to make reference to this procedure first, in order to resolve an id - ie:
exec dbo.AddProduct_Insert 'widget1'
which currently performs:SET @statusID = (SELECT statusID FROM statusList WHERE statusName='Created')INSERT INTO Products (productname, statusID) VALUES (''widget1', @statusID)
I want to simply the insert to perform (in one sproc):
SET @statusID = EXEC deriveStatusID ('Created')INSERT INTO Products (productname, statusID) VALUES (''widget1', @statusID)
This works fine if I call this stored procedure in code first, then pass it to the second stored procedure, but NOT if it is reference in the second stored procedure directly (I end up with an empty value for @statusID in this example).
My actual "Insert" stored procedures are far more complicated, but I am working towards lightening the business logic in my application ( it shouldn't have to pre-vet the data prior to executing a valid insert).
Hopefully this makes some sense - it doesn't seem right to me that this is impossible, and am fairly sure I'm just missing some simple syntax - can anyone assist?
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May 15, 2008
i have created the folowing function but keep geting an error.
Only functions and extended stored procedures can be executed from within a function.
Why am i getting this error!
Create Function myDateAdd
(@buildd nvarchar(4), @avdate as nvarchar(25))
Returns nvarchar(25)
as
Begin
declare @ret nvarchar(25)
declare @sqlval as nvarchar(3000)
set @sqlval = 'select ''@ret'' = max(realday) from (
select top '+ @buildd +' realday from v_caltable where realday >= '''+ @avdate +''' and prod = 1 )a'
execute sp_executesql @sqlval
return @ret
end
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Jun 17, 2006
hi
i need to use only one stored procedure and access many tablesso how write a stored procedure for that dohelp me looking forward for a reply to the earliest i am developing web page using asp.net using c# and sqlserver as backend
looking forward for a replygayathri
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Dec 15, 2006
I am interested to know about stored procedures in Mssql .Can anyone please help me out.
Thanx in advance.
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Feb 24, 2007
Hello I have two stored procedures
@ID INT
AS
SELECT (CASE WHEN NUM >= 10 THEN CAST(PAID AS FLOAT) / CAST(NUM AS FLOAT) * 100 WHEN NUM < 10 THEN 0 END) AS PER
FROM (SELECT (SELECT COUNT(*) AS Expr1
FROM Event_data AS D LEFT OUTER JOIN
Events AS E ON E.id = D.Event_id
WHERE (D.Transaction_type = 1) AND (D.Player_id = @ID)) AS NUM,
(SELECT COUNT(*) AS Expr1
FROM Event_data AS D LEFT OUTER JOIN
Events AS E ON E.id = D.Event_id
WHERE (D.Transaction_type = 1) AND (D.Transaction_value > 0) AND (D.Player_id = @ID)) AS PAID) AS X
and
@ID INT
AS
SELECT P.*,'/' + DBO.GETCHIPFOLDER(@ID) + '/' + ISNULL(P.PHOTO,'BLANK.GIF') AS PIC,ISNULL(
(SELECT SUM(TRANSACTION_VALUE)
FROM EVENT_DATA WHERE PLAYER_ID=@ID AND TRANSACTION_TYPE=1
GROUP BY PLAYER_ID),0) AS WINNINGS FROM PLAYERS P
undefined P
The first returns a percentage for player wins, the second gives me a photo and sums the player winnings
I would like to combine the results so I can get the percentage and wininngs in one query, in another matter all together I would like create a procedure like the first but instead of returning only one player, I would like to return the percentage for each player
Thanks in advance for any light you can shine on this.
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Feb 25, 2007
I have a question about stored procedures, Is it better to use stored procedures even if I only use it once at my site? Or is it better to write the sql-part directly in the sqldatasource?
And am I forced to create two different stored procedures even if they are exactly the same except the "Where-part"?
Now I have around 40 stored procedures, and quite many of them looks the same except the where-part...
(Iam just a beginner with SQL)
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May 2, 2007
Hello every one,
I m working in aspx 2.0 with sql server 2005, please tell me how can I create Stored Procedures for two or more tables not a single table(select,insert,update,delete please send me the queries which can help me in easy way I will very thankful to you
Thank you
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Jun 19, 2007
I am learning to make a ASP web site and feel that if i can do it the harder way using some stored procedures instead of using multiple datasources on each page requiring that it might be better. So i am wondering what are these used for:DECLARE vs just entering "@param1 varchar(30)"When i use "DECLARE @rc int" i get the error "Incorrect syntax near DECLARE"How to return values to ASP page in Visual Studio 2005 How to use @@rowcount - doesn't seem to work for me?i tried using DECLARE @rc intSET @rc = @@rowcountWhen to use GO, BEGIN etcIf i want to use the variable only in the procedure, and not needed to be inputed, do i need to put it in the CREATE PROCEDURE (section)?Should i use my own stored procedures or VS2005 created ones using datasources? not really procedures but SQL, in SQL can i do like IF ELSE? if i use my own i cant use the Optimistic Concurrency right? and whats that?
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Jul 5, 2007
Is there a website or somewhere i can go to read up on stored procedures??
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