Transact SQL :: STATIC Defines A Cursor That Makes Temporary Copy Of Data To Be Used By Cursor
Aug 12, 2015
In MSDN file I read about static cursor
STATIC
Defines a cursor that makes a temporary copy of the data to be used by the cursor. All requests to the cursor are answered from this temporary table in
tempdb; therefore, modifications made to base tables are not reflected in the data returned by fetches made to this cursor, and this cursor does not allow modifications
It say's that modifications is not allowed in the static cursor. I have a questions regarding that
Static Cursor
declare ll cursor global static
for select name, salary from ag
open ll
fetch from ll
while @@FETCH_STATUS=0
fetch from ll
update ag set salary=200 where 1=1
close ll
deallocate ll
In "AG" table, "SALARY" was 100 for all the entries. When I run the Cursor, it showed the salary value as "100" correctly.After the cursor was closed, I run the query select * from AG.But the result had updated to salary 200 as given in the cursor. file says modifications is not allowed in the static cursor.But I am able to update the data using static cursor.
can someone tell me how to use static cursor to read the rows applying it in procedure. i have input and output tables i will have to use input table to read data and then in procedure update/insert into output table ) insert values from input and dditioanl calulate charges. ok, there is my problem: An Internet service provider has three different subscription packages for its customers:
Package A: For $15 per month with 50 hours of access provided. Additional hours are $2.00 per hour over 50 hours. Assume usage is recorded in one-hour increments, i.e., a 25-minute session is recorded as one hour.
Package B: For $20 per month with 100 hours of access provided. Additional hours are $1.50 per hour over 100 hours.
Package C: For $25 per month with 150 hours access is provided. Additional hours are $1.00 per hour over 150 hours
Assume a 30-day billing cycle.
1) Create a table to hold customer input billing data.
2) Populate input table with follwing records:
CustomerID Pkg Hours ---------- --- ------ 1000 A 49 1010 A 50 1020 a 90 1030 a 130
1090 B 40 1100 B 99 1110 b 100 1120 b 145
1140 C 45 1150 c 85 1160 c 149 1170 c 150 1180 c 200
3) Create a table to hold customer data used to generate the statement to be sent to the customer. It should include CustomerID, Package, HoursUsed, and Charges.
Write an SQL script that reads customer billing data, calculates a customer’s monthly charges, and populates the customer statement table. Use Cursor to process records and Stored Procedures for ProcessBill and calcCharges.
insert into custinput values (1000,'A',49); insert into custinput values (1010,'A',50); insert into custinput values (1020,'a',90); insert into custinput values (1030,'a',130); insert into custinput values (1090,'B',40); insert into custinput values (1100,'B',99); insert into custinput values (1110,'b',100); insert into custinput values (1120,'b',145);
insert into custinput values (1140,'C',45); insert into custinput values (1150,'c',85);
insert into custinput values (1160,'c',149); insert into custinput values (1170,'c',150); insert into custinput values (1180,'c',200);
then there is conditions:
if upper (@pkg)= 'A' begin if @hrs<= 50 set @charges =15 else set @charges =15 + (@hrs-50)*2
end;
else if upper(@pkg)= 'B' begin if @hrs <= 100 set @charges = 20 else set @charges = 20 + (@hrs - 100)*1.5
end; else
if @hrs <=150 set @charges = 25 else set @charges =25+(@hrs-150)
insert into custoutput values(@cust_id,@pkg,@hrs,@charges)
an example for the pb 1)First i have created a dynamic cursor :
DECLARE authors_cursor CURSOR DYNAMIC FOR Select DISTINCT LOCATION_EN AS "0Location" from am_location WHERE LOCATION_ID = 7 OPEN authors_cursor FETCH first FROM authors_cursor
2)The result for this cursor is for expamle 'USA'.
3) If now i do an update on that location with a new value 'USA1'
update am_location set location_en = 'USA1' WHERE LOCATION_ID = 7
4)now if i fetch the cursor , i''ll get the old value (USA) not (USA1).
If i remove DISTINCT from the cursor declaration , the process works fine .
An example for my pb 1) Created a dynamic cursor : DECLARE cursor_teste CURSOR DYNAMIC FOR Select DISTINCT name from table WHERE ID = 1 OPEN cursor_teste FETCH first FROM cursor_teste 2)The result for this cursor is for example 'teste'. 3) If now i do an update on that name with a new value 'teste1' than if i fetch the cursor , i''ll get the old value (teste) .
any idea how to make a select distinct result in a dynamic Cursor?
I want to put the fetch results of a cursor to a temporary DB for manipulation, Im selecting all columns from the table in the cursor and the number of total columns is unknow.
ALTER function [Event].[DetermineTrackTime](@TrialID varchar(max)) returns int as begin Declare @ret int; Declare @EnterVolumeTime int; Declare @ExitVolumeTime int; Declare @StartTrackTime int;
[code]....
I am getting the following error on line 75:
Select statements included within a function cannot return data to a client.
This is happening when declaring TrackUpdateCursor
The compiler has no problem with the VolumeTimesCursor. What is causing this and what can I do about it?
Hello,I have a test database with table A containing 10,000 rows and a tableB containing 100,000 rows. Rows in B are "children" of rows in A -each row in A has 10 related rows in B (ie. B has a foreign key to A).Using ODBC I am executing the following loop 10,000 times, expressedbelow in pseudo-code:"select * from A order by a_pk option (fast 1)""fetch from A result set""select * from B where where fk_to_a = 'xxx' order by b_pk option(fast 1)""fetch from B result set" repeated 10 timesIn the above psueod-code 'xxx' is the primary key of the current Arow. NOTE: it is not a mistake that we are repeatedly doing the Aquery and retrieving only the first row.When the queries use fast-forward-only cursors this takes about 2.5minutes. When the queries use dynamic cursors this takes about 1 hour.Does anyone know why the dynamic cursor is killing performance?Because of the SQL Server ODBC driver it is not possible to havenested/multiple fast-forward-only cursors, hence I need to exploreother alternatives.I can only assume that a different query plan is getting constructedfor the dynamic cursor case versus the fast forward only cursor, but Ihave no way of finding out what that query plan is.All help appreciated.Kevin
I'm trying to implement a sp_MSforeachsp howvever when I call sp_MSforeach_worker I get the following error can you please explain this problem to me so I can over come the issue.
Msg 16958, Level 16, State 3, Procedure sp_MSforeach_worker, Line 31
Could not complete cursor operation because the set options have changed since the cursor was declared.
Msg 16958, Level 16, State 3, Procedure sp_MSforeach_worker, Line 32
Could not complete cursor operation because the set options have changed since the cursor was declared.
Msg 16917, Level 16, State 1, Procedure sp_MSforeach_worker, Line 153
Cursor is not open.
here is the stored procedure:
Alter PROCEDURE [dbo].[sp_MSforeachsp]
@command1 nvarchar(2000)
, @replacechar nchar(1) = N'?'
, @command2 nvarchar(2000) = null
, @command3 nvarchar(2000) = null
, @whereand nvarchar(2000) = null
, @precommand nvarchar(2000) = null
, @postcommand nvarchar(2000) = null
AS
/* This procedure belongs in the "master" database so it is acessible to all databases */
/* This proc returns one or more rows for each stored procedure */
/* @precommand and @postcommand may be used to force a single result set via a temp table. */
declare @retval int
if (@precommand is not null) EXECUTE(@precommand)
/* Create the select */
EXECUTE(N'declare hCForEachTable cursor global for
I have a Stored Procedure. In that SP, I am calling 10 table-valued user defined function to calculate different pricing charges (lets say delivery charge, fuel surcharge, etc). In that SP, there is one Temporary table to store the data required for calculating charges and some columns will hold the calculated data in the same temp table.
1. First step is loading the columns in Temporary table in the SP which are required for calculating charges (will be having 1000 records for example) 2. Second step is to calculate charges ( delivery charge, fuel surcharge, etc). for each rows(1000 rows) from the temporary table using table-valued user defined functions one by one*Call function to calculate DeliveryCharge in the SP and calculate DeliveryCharge for all 1000rows. For this step i am using cursor to loop through 1000records and find DeliveryCharge for each row and update it in the DeliveryCharge column in the same temporary table. I am using 10 cursors for 10 different price calculations in the SP 3. Finally, the SP will return that 1000 records with calculated prices. The question is how to avoid Cursor for these operations. How to pass all 1000 records to a function and get table valued results from that function and update those results in the Temporary table without using cursors?
Am I using the cursor feature properly here? -- of course there would be actual processing (replacing a while loop) going on and not simple print statements.
Declare @BadgeNumber varchar(20), @name varchar(100), @phone int, @status varchar(25) Declare cursor Cursor For Select jt.BadgeNumber, tj.Name, jt.Phone, zt.status From employees jt join employeestatus zt On jt.id = zt.id
I have a parent-child table, and i want to copy subtrees of it, so for instance this would be the starting point: (id, parentId, label) 0, null, World 1, 0, US 2, 1, NY 3, 0, UK 4, 3, London
now i want to copy object 3 (UK) and it's children, so i would get 0, null, World 1, 0, US 2, 1, NY 3, 0, UK 4, 3, London 5, 0, UK_copy 6, 5, London_copy
I have this sproc:
Code Snippet
alter proc CopyObject
(@ObjectId int,
@NewParentId int)
as
declare @NewId int,
@NewName varchar
select @NewId = max(Id) + 1 from Object
select @NewName = [Name] + 'copy' from [Object] where Id = @ObjectId
-- copy object
INSERT INTO [Object]
([Id]
,[Name]
,[ParentId]
select @NewId,
@NewName,
@NewParentId
from [Object]
where Id = @ObjectId
-- copy children and set their parent to the newly created object
declare c cursor fast_forward for
select Id
from [Object]
where ParentId = @ObjectId
declare @ChildId int
open c
fetch next from c into @ChildId
while @@fetch_status = 0
begin
exec CopyObject
@ObjectID = @ChildId,
@NewParentId = @NewId
fetch next from c into @ChildId
end
close c
deallocate c
But htis throws an error that the cursor already exists:
Msg 16915, Level 16, State 1, Procedure CopyObject, Line 66
A cursor with the name 'c' already exists.
Msg 16905, Level 16, State 1, Procedure CopyObject, Line 72
The cursor is already open.
I've tried to think of an approach without cursors, but i can't figure it out. Because on the first pass, the new parentId will be the same as the parentId of the object to be copied. But the copies of the children of this first original object should have the parentid set to id of the copied object, and so all the way down the tree.
DECLARE DBCur CURSOR FOR SELECT U_OB_DB FROM [@OB_TB04_COMPDATA]
OPEN DBCur FETCH NEXT FROM DBCur INTO @DBNAME
WHILE @@FETCH_STATUS = 0 BEGIN
SELECT @SQLCMD = 'SELECT T0.CARDCODE, T0.U_OB_TID AS TRANSID, T0.DOCNUM AS INV_NO, ' + + 'T0.DOCDATE AS INV_DATE, T0.DOCTOTAL AS INV_AMT, T0.U_OB_DONO AS DONO ' + + 'FROM ' + @DBNAME + '.dbo.OINV T0 WHERE T0.U_OB_TID IS NOT NULL' EXEC(@SQLCMD) PRINT @SQLCMD FETCH NEXT FROM DBCur INTO @DBNAME
END
CLOSE DBCur DEALLOCATE DBCur
Part 2
SELECT T4.U_OB_PCOMP AS PARENTCOMP, T0.CARDCODE, T0.CARDNAME, ISNULL(T0.U_OB_TID,'') AS TRANSID, T0.DOCNUM AS SONO, T0.DOCDATE AS SODATE, SUM(T1.QUANTITY) AS SOQTY, T0.DOCTOTAL - T0.TOTALEXPNS AS SO_AMT, T3.DOCNUM AS DONO, T3.DOCDATE AS DO_DATE, SUM(T2.QUANTITY) AS DOQTY, T3.DOCTOTAL - T3.TOTALEXPNS AS DO_AMT INTO #MAIN FROM ORDR T0 JOIN RDR1 T1 ON T0.DOCENTRY = T1.DOCENTRY LEFT JOIN DLN1 T2 ON T1.DOCENTRY = T2.BASEENTRY AND T1.LINENUM = T2.BASELINE AND T2.BASETYPE = T0.OBJTYPE LEFT JOIN ODLN T3 ON T2.DOCENTRY = T3.DOCENTRY LEFT JOIN OCRD T4 ON T0.CARDCODE = T4.CARDCODE WHERE ISNULL(T0.U_OB_TID,0) <> 0 GROUP BY T4.U_OB_PCOMP, T0.CARDCODE,T0.CARDNAME, T0.U_OB_TID, T0.DOCNUM, T0.DOCDATE, T3.DOCNUM, T3.DOCDATE, T0.DOCTOTAL, T3.DOCTOTAL, T3.TOTALEXPNS, T0.TOTALEXPNS
my question is, how to join the part 1 n part 2? is there posibility?
When I run this update statement, it updates the proper badgenumbers but it only updates them to 1 when I did a count? As the data displays some of the results should be more than 1. Why did this occur?
I write few lines to do a bottom-up calculation, with 'fetch last' and 'fetch prior'.
It seems that the condition 'WHILE @@FETCH_STATUS = 0' does not work when cursor arrives at the first line, as there is an error message:
'(1 row(s) affected) 6255.84 (1 row(s) affected) Msg 16931, Level 16, State 1, Line 18
There are no rows in the current fetch buffer.
The statement has been terminated.'
how to fix the error?
Here is my code:
DECLARE @lastprice real DECLARE @updatedprice real DECLARE @updatedRe real DECLARE @updatedAUX real SET @lastprice = ( SELECT Close_P from #ClosePrice where #ClosePrice.DateTD = (SELECT MAX(#ClosePrice.DateTD) FROM #ClosePrice) )
I have a table which table has :Identity Column (Identity), Schema name and Table_Name.
So I would like to write a cursor For each Table Count(*) from Table--@Cnt Int , Schemaname and Tablename need to store another table.
Implement a USP, using a cursor that scan the table, generate select count statement from configuration table and fire the select count statement and record the result of the query in the log table :
how can I write a cursor and Import Those results into to Another table.
I have a table which is a configuration table, I have declared cursors whereby the cursor doesn't get to all the rows in the configuration table even though there is no where clause in the select statement and the cursor ought to loop/go through every single row. Changed the cursor to the below and it started to go through all rows.
DECLARE XXX CURSOR LOCAL FORWARD_ONLY STATIC READ_ONLY TYPE_WARNING FOR
Now with the definition above, I am now having a situation whereby a column in row 1 which is a bit data type and has a value of 0, then the cursor gets to row 2 the same column but with a value of 1 and an if statement in the cursor saying
IF @row2columnX = 0 set @myval = 99
For some reason within the cursor the IF statement is being implemented even though the value in row2 columnX is = 1
I find it so weird. Is there a database property that affects the way cursors react or is there something that I am doing incorrectly ? Lastly, I would like to have a simple cursor template which simply goes through a configuration table or any table.
i read in the SET ROWCOUNT documentation URL.... that 'The ROWCOUNT option does not affect dynamic cursors', it does affect my dynamic cursor created in a table function which looks like this :
CREATE FUNCTION MyTableFunction() RETURNS @MyTable TABLE (MYFIELD INTEGER) AS BEGIN DECLARE @xxx INTEGER DECLARE My_Cursor CURSOR DYNAMIC FOR
[code]...
I would like the number of rows retruned by MyTableFunction limited to 2, but NOT the inside proc cursor's select !Set Rowcount 0 is forbidden in table function. I cannot use TOP in select * from MyTableFunction instead of setting ROWCOUNT to 2. I'm using SQL Server 2008 or 2012.
After parsing unformatted XML file, we are loading XML in formatted for into a SQL table rows, so that SSIS can read it and load it to DW tables.
We have a flag column in the above table, which gets updated after each row is extracted successfully by the Procedure(cursor inside Proc) used in SSIS, but cursor inside Procedure is taking 16 hours to load 100k xml source files, if we remove cursor and use bulk load then it takes only 1.5 Hrs. but with bulk load we cannot update the flags.
I appear to be having an issue where the @LetterVal and @Numeric variables aren't resetting for each loop iteration, so if no results are found, it just returns the previous loops values since they aren't overwritten. Below is the stored procedure I've created:
ALTER PROCEDURE [dbo].[ap_CalcGrade] -- Add the parameters for the stored procedure here @studId int, @secId int, @grdTyCd char(2), @grdCdOcc int, @Numeric int output,
[Code] ....
And below is the "test query" I'm using:
-- *** Test Program *** Declare @LetterVal varchar(2), -- Letter Grade @Numeric int, -- Numeric Grade @Result int -- Procedure Status (0 = OK) Execute @Result = dbo.ap_CalcGrade 102, 86, 'QZ', 3,
[Code] ....
This is resulting in an output of:
A+ 97 A+ 97 C- 72
but it should be returning the output below due to the 2nd data set not being valid/found in the sp query:
A+ 97 No Find C- 72
I'm sure this is sloppy and not the most efficient way of doing this, so whats causing the errant results, and if there is any better way I should be writing it. Below is the assignment requirements:
Create a stored procedure using the STUDENT database called ap_CalcGrade that does the following:
1. Accepts as input STUDENT_ID, SECTION_ID, GRADE_TYPE_CODE, and GRADE_CODE_OCCURRENCE 2. Outputs the numeric grade and the letter grade back to the user 3. If the numeric grade is found, return 0, otherwise return 1 4. You must use a cursor to loop through the GRADE_CONVERSION table to find the letter grade
I'm new to cursors, and I'm not sure what's wrong with this code, it run for ever and when I stop it I get cursor open errors
declare Q cursor for select systudentid from satrans
declare @id int
open Q fetch next from Q into @id while @@fetch_status = 0 begin
declare c cursor for
Select b.ssn, SaTrans.SyStudentID, satrans.date, satrans.type, SaTrans.SyCampusID, Amount = Case SaTrans.Type When 'P' Then SaTrans.Amount * -1 When 'C' Then SaTrans.Amount * -1 Else SaTrans.Amount END
From SaTrans , systudent b where satrans.systudentid = b.systudentid
I having a difficult time here trying to figure out what to do here.I need a way to scroll through a recordset and display the resultswith both forward and backward movement on a web page(PHP usingADO/COM)..I know that if I use a client side cursor all the records get shovedto the client everytime that stored procedure is executed..if thisdatabase grows big wont that be an issue?..I know that I can set up a server side cursor that will only send therecord I need to the front end but..Ive been reading around and a lot of people have been saying never touse a server side cursor because of peformance issues.So i guess im weighing network performance needs with the client sidecursor vs server performance with the server side cursor..I am reallyconfused..which one should I use?-Jim
Hi, here is my problem and hopefully somebody has an idea. What i am working on is an order tracking system. i insert the orders into sql then when the orders come in i check for the oldest order and apply the qty we recieved to that order...pretty simple. The problem is that some times we have 5 orders for the week and we then recieve them as one order so there will be 5 orders to fill. I can do this for 2 orders and was thinking about using a cursor to so this instead of a really drawn out procedure but am not sure how that would work if it would at all. Does anybody have any ideas?
I wrote a stored procedure for SqlServer 2000 and i am using it for paging purpose. The procedure is as follows :
set ANSI_NULLS ON set QUOTED_IDENTIFIER ON go ALTER PROCEDURE [dbo].[OLAP_PagedRows] ( @SelectFields nVarchar(2000) =NULL,
@GroupByFields nvarchar(1000) =NULL,
@BaseTable varchar(100),
@KeyColumn nvarchar(200)=NULL ,
@JoinTables varchar(500) =NULL,
@ConditionalClause varchar(1000) =NULL,
@Pagesize int = 10,
@PageNumber int =1,
@SortExpression nvarchar(200)=NULL,
@SearchText nvarchar(200)=NULL
)
AS
BEGIN
DECLARE @SQLSTMT NVarchar(4000)
DECLARE @SQLSTMT1 NVarchar(4000)
SET @SQLSTMT1 = ''
--check whether page size is given null or not, if so set to default value
IF @Pagesize IS NULL OR @Pagesize = ''
BEGIN
SET @Pagesize =10
END
--check whether page number is given null or not, if so set to default value
IF @PageNumber IS NULL OR @PageNumber = ''
BEGIN
SET @PageNumber =1
END
--Start constructing the query --
SET @SQLSTMT = 'SELECT '
SET @SQLSTMT1 = 'DECLARE @CountValue INT SELECT @CountValue = count(*) From '+@BaseTable
SET @SQLSTMT = @SQLSTMT + @SelectFields + ' FROM '+@BaseTable
If @JoinTables Is Not Null
BEGIN
SET @SQLSTMT = @SQLSTMT + ' ' +@JoinTables
SET @SQLSTMT1 = @SQLSTMT1 + ' ' +@JoinTables
END
DECLARE @StmtWhereClause nvarchar(500)
SET @StmtWhereClause =''
--------------------- Get where conditional clause
If (@SearchText Is Not Null AND RTRIM(LTRIM(@SearchText))<>'')
BEGIN
SET @StmtWhereClause = @StmtWhereClause + ' WHERE ' + @SearchText
END
If @ConditionalClause Is Not Null AND RTRIM(LTRIM(@ConditionalClause))<>''
BEGIN
IF (@StmtWhereClause <> '')
BEGIN
SET @StmtWhereClause= @StmtWhereClause + 'AND ' +@ConditionalClause
END
ELSE
BEGIN
SET @StmtWhereClause = @StmtWhereClause + ' WHERE ' + @ConditionalClause
END
END
SET @SQLSTMT = @SQLSTMT + @StmtWhereClause
SET @SQLSTMT1 = @SQLSTMT1 + @StmtWhereClause
If @GroupByFields Is Not Null And RTRIM(LTRIM(@GroupByFields))<>''
BEGIN
SET @SQLSTMT = @SQLSTMT + ' Group By ' +@GroupByFields
SET @SQLSTMT1 = @SQLSTMT1 + ' Group By ' +@GroupByFields
END
IF @SortExpression Is Not Null AND RTRIM(LTRIM(@SortExpression))<>''
BEGIN
SET @SortExpression = LTRIM(RTRIM(' Order By '+ @SortExpression))
SET @SQLSTMT = @SQLSTMT +' '+ @SortExpression
SET @SQLSTMT1 = @SQLSTMT1 +' '+ @SortExpression
END
SET @SQLSTMT1= @SQLSTMT1+' SELECT @CountValue As MyRows '
--SELECT @SQLSTMT1
--SELECT @SQLSTMT
DECLARE @StartRow INT
SET @SQLSTMT = ' DECLARE temp_Cursor CURSOR SCROLL FOR '+@SQLSTMT
EXECUTE SP_EXECUTESQL @SQLSTMT
Open temp_Cursor
DECLARE @RowCount INT
SET @RowCount = 1
SET @startRow = (@PageSize * (@PageNumber-1))+@RowCount
--SELECT @startRow as 'Current Row'
WHILE @RowCount <= @PageSize
BEGIN
--Select @StartRow 'as @StartRow'
FETCH ABSOLUTE @startRow From temp_Cursor
SET @RowCount= @RowCount+1
SET @StartRow = @startRow + 1
END
deallocate temp_Cursor
EXECUTE SP_EXECUTESQL @SQLSTMT1
END
It is working fine but I have problem with this kind of paging. I need to load the whole data into the cursor and i have to fetch records. The problem is that my table's contains more than Half a million records in it. If I have to load each time this cursor it will be a very big problem on the server side.
Probably it may not be a best solution, but sqlserver 2000 cannot provide more help than this. If I use sub-query for this like using Top <Number> it adversly effecting the nature of the data retrieval.
One solution that I am thinking is Load cursor once and whenever some updations performed on those tables from which cursor is getting data should be automatically reflect the changes.
I defined a stored procedure with a cursor inside for updating data. When I call it from an MSAccess client, it fails. When I execute it directly in a ISQL/w windows, it doesn`t fail but it displays me the data (wich is the reason for failing from MSAccess). Do somebody know if I could do it without displaying data in the screen ??
