Avoiding Compilation
Jul 20, 2005
Using small stored procs or sp_executesql dramatically reduces the number of
recompiles and increases the reuse of execution plans. This is evident from
both the usecount in syscacheobjects, perfmon, and profiler. However I'm at
a loss to determine what causes a compilation. Under rare circumstances the
usecount for Compiled Plan does not increase as statements are run. Seems
to correspond to when there is no execution plan. It would seem to me that
compilation is a resource intensive task that if possible (data and schema
are not changing) should be held to a minimum.
How does one encourage the reuse of compile plans?
Is this the same as minimizing compilation?
Looks like some of this behavior is changing in SQL 2005....
Thanks,
Danny
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Sep 30, 2004
I'm trying to connect to an SQL database through my asp.net page and I'm getting an Compiler Error Message: BC30188: Declaration expected for the following codes:
DBConn= New OledbConnection("Provider=sqloledb;" _
DBInsert.Commandtext = "Insert Into GuestInfo" _
DBInsert.Connection =DBConn
DBInsert.Connection.Open
DBInsert ExecuteNonQuery()
What I'm trying to do is connect to the SQL database and input new information to the database.
This is the entire code for connecting and entering info into the database. The SQL Database's name is HMS. I'm stuck and I can't figure it out.
Dim DBConn as oledbConnection
Dim DBInsert As New oledbCommand
DBConn= New OledbConnection("Provider=sqloledb;" _
& "server=localhost;" _
& "Initial Catalog=HMS;" _
& "User id=sa;" _
& "Password=yourpassword;")
DBInsert.Commandtext = "Insert Into GuestInfo" _
& "(FirstName,Lastname,Address,City,State,Zipcode) values ('" _
&"'" & txtFirstName.Text & "', " _
&"'" & txtLastName.Text & "', " _
&"'" & txtAddress.Text & "', " _
&"'" & txtCity.Text &"', " _
&"'" & txtState.Text &"', " _
&"'" & txtZipCode.Text &"', ")"
DBInsert.Connection =DBConn
DBInsert.Connection.Open
DBInsert ExecuteNonQuery()
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Jan 28, 2014
SP is taking more time for compilation.SP has 30 update statement all are using indexed column in where clause.how can i force SP to take less compilation time.
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Jul 20, 2005
Hi,I'm using SQL Server 2000 MSDE on a laptop running Windows XP.I have a couple of SP's that that quite some time to compile. So I waswondering: is there any way to have the database *not* recompile them everytime after a reboot?BOL says: "As a database is changed by such actions as adding indexes orchanging data in indexed columns, the original query plans used to accessits tables should be optimized again by recompiling them. This optimizationhappens automatically the first time a stored procedure is run afterMicrosoft® SQL ServerT 2000 is restarted."Now the SQL Server is restarted a lot, because laptops don't have endlessbatteries <g>Cheers,Bas
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May 5, 2008
Hi,
We are using .Net 2.0 for developing our application, All the file in this application are source safed, Whenever we do modification in the code it take longer time to build approax it takes around 2 min to display the default page (login page).
Please do send out your suggestions to reduce the time take for the build, is there any setting need to be done in IDE to make the build process much faster.
Regards
K.Karthik Doss
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Aug 10, 2006
Hi,
I would like to know if the execution plans of stored procs also get migrated when we do migration to 2005 from 2000 using attachdetach method or we will need to re-run the stored procs?
The thing is when I am running the Stored procs in 2005, its performing really slow in first run.
Any help in his regard is highly appreciated.
Thanks,
Ritesh
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Nov 13, 2006
How can we say whether the SP is successfully compiled or not if we are compiling it on the server as a part of the TSQL script since it does not throw any message like ORACLE does.
In oracle, system will let you know whether the the procedure is successfully complied or not?
Thanks/
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Jul 5, 2007
Hi all,
I€™m having a test regarding to the image data type. The test program is written with sql native api and just update the image data type column, but I looked the SQL Compilations/sec and Batch Requests/sec counters in SQLServer:QL Statistics using Perfmon, both values are almost the same. It seemed whenever the stored procedure is called, SQLServer compiles it and makes execution plan again. But when I had a test without image data type, SQL Compilation/sec was 0. SQL version is Microsoft SQL Server 2005 - 9.00.3054.00 (Intel X86) (Build 2600: Service Pack 2).
Is SQL server working the way expected or am I missing something?
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Oct 24, 2005
Hi all,Here is my error: Server: Msg 245, Level 16, State 1, Procedure NewAcctTypeSP, Line 10Syntax error converting the varchar value 'The account type is already exist' to a column of data type int.Here is my procedure:ALTER PROC NewAcctTypeSP(@acctType VARCHAR(20), @message VARCHAR (40) OUT)ASBEGIN --checks if the new account type is already exist IF EXISTS (SELECT * FROM AcctTypeCatalog WHERE acctType = @acctType) BEGIN SET @message = 'The account type is already exist' RETURN @message END
BEGIN TRANSACTION INSERT INTO AcctTypeCatalog (acctType) VALUES (@acctType) --if there is an error on the insertion, rolls back the transaction; otherwise, commits the transaction IF @@error <> 0 OR @@rowcount <> 1 BEGIN ROLLBACK TRANSACTION SET @message = 'Insertion failure on AcctTypeCatalog table.' RETURN @message END ELSE BEGIN COMMIT TRANSACTION END
RETURN @@ROWCOUNTENDGO
--execute the procedureDECLARE @message VARCHAR (40);EXEC NewAcctTypeSP 'CDs', @message;I am not quite sure where I got a type converting error in my code and anyone can help me solve it???(p.s. I want to return the @message value to my .aspx page)Thanks.
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Feb 12, 2004
Hi ,
I am creating a function which is going to return a table. The Code ofr the function is as follows...
===============================
Create function udf_qcard (@cg1 varchar(25)) returns @rec_card table (t_cusip varchar(10),t_data varchar(70))
AS
begin
declare @t1_sys char(10),@t1_all varchar(11)
declare @temp_qcard table (tdata varchar(11) collate SQL_Latin1_General_CP1_CS_AS)
if (substring(@cg1,1,2)='Q$')
set @cg1 = (select substring(@cg1,3,len(@cg1)) where substring(@cg1,1,2)='Q$')
DECLARE c1 SCROLL CURSOR FOR select groups_system, substring(groups_alldata,3,10) from tbl_groups
where groups_system = @cg1 and groups_alldata like 'Q$%' and groups_seq>=1 FOR READ ONLY
insert into @temp_qcard values(@cg1)
OPEN C1
FETCH NEXT FROM c1 INTO @t1_sys,@t1_all
WHILE @@FETCH_STATUS = 0
BEGIN
insert into @temp_qcard values(@t1_all)
declare @t2_sys char(10),@t2_all varchar(10)
DECLARE c2 SCROLL CURSOR FOR select groups_system, substring(groups_alldata,3,10) from tbl_groups
where groups_system = @t1_all and groups_alldata like 'Q$%' and groups_seq>=1 FOR READ ONLY
begin
OPEN C2
FETCH NEXT FROM c2 INTO @t2_sys,@t2_all
WHILE @@FETCH_STATUS = 0
BEGIN
insert into @temp_qcard values(@t2_all)
declare @t3_sys char(10),@t3_all varchar(10)
DECLARE c3 SCROLL CURSOR FOR select groups_system, substring(groups_alldata,3,10) from tbl_groups
where groups_system = @t2_all and groups_alldata like 'Q$%' and groups_seq>=1 FOR READ ONLY
begin
OPEN C3
FETCH NEXT FROM c3 INTO @t3_sys,@t3_all
WHILE @@FETCH_STATUS = 0
BEGIN
insert into @temp_qcard values(@t3_all)
FETCH NEXT FROM c3 INTO @t3_sys,@t3_all
end
end
close c3
deallocate c3
FETCH NEXT FROM c2 INTO @t2_sys,@t2_all
end
end
close c2
DEALLOCATE c2
FETCH NEXT FROM c1 INTO @t1_sys,@t1_all
END
CLOSE c1
DEALLOCATE c1
Insert @rec_card select groups_q+groups_cusip,groups_data from tbl_groups
where groups_system in (select tdata from @temp_qcard) and groups_seq>=1 and groups_alldata not like 'Q$%' order by groups_alldata
RETURN
END
==========================
While compiling this I am getting the Below error ....
==================
Server: Msg 1049, Level 15, State 1, Procedure udf_qcard, Line 10
Mixing old and new syntax to specify cursor options is not allowed.
Server: Msg 1049, Level 15, State 1, Procedure udf_qcard, Line 23
Mixing old and new syntax to specify cursor options is not allowed.
Server: Msg 1049, Level 15, State 1, Procedure udf_qcard, Line 35
Mixing old and new syntax to specify cursor options is not allowed.
=================
Can Anyone please help me how to resolve this issue...
Thanks with Regards.
-Mohit.
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Jul 20, 2005
hi,when i execute :CCommand<CManualAccessor, CBulkRowset, CNoMultipleResults> rs;rs.SetRows(100);HRESULT code_resultat = rs.Open(session, requete, &propset, NULL,DBGUID_DBSQL, FALSE);with a requete with length = 13000, it works perfectlybut when my requete length is 200000 (example : SELECT * FROM myTABLEWHERE id_table IN("lot of number : more then 30000 number"))i have code_resultat = DB_E_ERRORSINCOMMAND (= 0x80040e14)and when i explore the IErrorInfo message, i have :minor = 565 and the message issource :Microsoft OLE DB Provider for SQL Serverserveur has made a stack overflow during compilation...Is there a solution to extract to data ?in a fast way ...thanks in advance ...Mike
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Mar 6, 2007
I am wondering something, once we've created a job that executes a package at a given time interval, does that package get recompiled each time the job spins up and executes the package? Or is the package compiled once and then that compiled code is executed each run after the first run?
What I'm seein is this; I have a package that reads data from flat text files and then dumps that data into the database. The package will take 3 minutes to execute when executing on a single file, but when it's looping through ~50 files, it will take ~30 minutes to execute, that is less than a minute per file. Why is this?
Hopefully I'm just forgetting something and not setting a checkbox or radio button somewhere. The job is set up as an SSIS job, not as a command line job.
Thanks in advance for any help you can give me.
Wayne E. Pfeffer
Sr. Systems Analyst
Hutchinson Technolgy Inc.
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Nov 29, 2006
Hi,
I would like to find out about SSIS compilation. Can you mention anything regarding this issue or can you point me out to a website for this topic please?
Thanks
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Dec 30, 2003
I've been looking over this and can't see anything wrong. Can anyone shed some light on this for me?
------------------
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS0117: 'System.Data.SqlClient.SqlConnection' does not contain a definition for 'ExecuteReader'
Source Error:
Line 16: SqlCommand myComm = new SqlCommand("SELECT users, password FROM users WHERE username='" + username + "' AND password='" + password + "'", myConn);
Line 17: myConn.Open();
Line 18: SqlDataReader myReader = myConn.ExecuteReader();
Line 19: do
Line 20: {
Source File: D:Inetpubhoteladvisor estLogin.aspx Line: 18
void Login(string username, string password)
{
SqlConnection myConn = new SqlConnection ("server = client1; uid = dbadmin; pwd = dbadmin; database = hotels");
SqlCommand myComm = new SqlCommand("SELECT users, password FROM users WHERE username='" + username + "' AND password='" + password + "'", myConn);
myConn.Open();
SqlDataReader myReader = myConn.ExecuteReader();
do
{
while (reader.Read())
{
if (username == myReader.GetString(1) && password == myReader.GetString(2))
{
messages.Text = "Your login was successful!";
}
else
{
messages.Text = " Your login was unsuccessful!";
}
}
}
while (reader.NextResult());
myReader.Close();
myConn.Close();
}
void Submit_Click(Object sender, EventArgs e)
{
Login(username.Text, password.Text);
}
Edit by moderator - NetProfit: Added < code>< /code> tags.
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Oct 12, 2015
I am re-writing old DTS packages(from sql 2005) to convert them to SSIS packages(sql 2014) and in one of the script task, the old activex script does not run.
The script is :
'************************
' Visual Basic ActiveX Script
'************************
Function Main()
mydate = now()
yrs = ""
mth = ""
mth = Month(mydate) - 1
yrs = Right(Year(mydate), 4)
If Month(mydate) = 1 Then mth = "12"
[code].....
Not sure how to proceed forward? I am quite new to package migration
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Apr 2, 2008
I have an application that is moving from an home made full text search engine to using the full text indexing engine of SQL 2005. I have a stored procedure that I want to behave as:
check documents table to determine whether a full text index for SQL's full text engine has been created.
If it has not, query the documentText table (which is the table for my in-house full text search)
If it has, use the full text indexing engine
My problem is that compilation of the TSQL to create the stored procedure fails when the full text index has not already been created with the followign error:
Msg 7601, Level 16, State 2, Procedure My_FullTextSearch, Line 0
Cannot use a CONTAINS or FREETEXT predicate on table or indexed view 'Documents' because it is not full-text indexed.
In my test lab, I tried:
1. creating the full text index
2. creating the stored procedure
3. deleting the ful text index
which gets me to the desired end result of having a stored procedure that can determine whether or not the full text index has been created yet (the procedure works in this state). But I creating this index as part of this stored procedure creation in production is not an option.
My question - Can I somehow tell SQL to ignore the compilation errors it encounters while creating this stored procedure? If not, is there some other way to create this "smart" stored procedure?
Here's a code snippet stripped down to the bare minimum to generate the error:
CREATE PROCEDURE [My_FullTextSearch]
@Term VarChar(1000)
AS
BEGIN
SET NOCOUNT ON;
IF NOT OBJECTPROPERTY(OBJECT_ID('Documents'), 'TableHasActiveFulltextIndex')=1
BEGIN
Select [DocumentID]
from [DocumentText]
where [Term] like '%' + LTRIM(@Term) + '%'
END
ELSE
BEGIN
Select [key] from FREETEXTTABLE(Documents, Contents, @Term)
END
END
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Apr 17, 2007
Hello
I am running an script and the following sentence throws and error because the DTC service is not running in the Remote Server:
insert into MyLocalTable
execute synonym_MyRemoteProcedure @SomeParameter
Since a transaction is not declared within the script, why is the DTC required?
How can I avoid the usage of the DTC? Is there a way to say "this code is not within a distributed transaction"?
Thanks a lot.
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Apr 8, 2008
Here is a simplified example of a problem I am facing.
I have 2 tables: Tasks and Employees.
Tasks:
(Task_ID, Task_Name, Task_Type, Task_Requirement, Employee_ID)
Employees:
Emp_ID, Emp_Name, Emp_Specialty, Emp_Task_Cnt, Max_Task_Cnt
Requirements: Write a MS SQLServer 2000 Storeed Procedure to:
1. Update the Tasks table by assigning the task to an Employee.
2. Incrememnt the employee's Emp_Task_Cnt for each Task assigned.
3. Match the Employee to the Task by matching the Task_Requirement to the Emp_Specialty.
4. Do not exceed the employee's Max_Task_Cnt.
I have a working solution to the requirements, but it involves using cursor logic. For all the obvious reasons, I wanted to avoid using a cursor (or cursor-like looping structure) but could not figure out any other way to avoid processing the Task table one record at a time because of the: "4. Do not allow an Employee's Task_Cnt to exeed the Max_Task_Cnt."
Q: Is there a way to do this without using a cursor and still meet all of the requirements?
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May 9, 2007
I'm trying to performance tune a procedure and am sort of being thwarted by caching.
When I first run the procedure, it takes a few seconds which is too long in this case. Subsequent executions in Management Studio are nearly instantaneous, though, which I imagine is due to caching and does not reflect the behavior of the procedure in production.
Is there a way to disable caching so that each execution of the procedure in Management Studio will be consistent and reflect the "first run" performance?
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Sep 7, 2007
This query uses a cursor to fetch a parameter and pass it to another Stored proc. Is there a straightforward way to do this without using a cursor?
declare @deleteunassigned int
declare cur_unassigned cursor for select distinct a.cust_cont_pk
from cust_cont a, cont_fold_ass b (NOLOCK)
where a.cust_cont_pk != b.CUST_CONT_PK
open cur_unassigned
fetch next from cur_unassigned into @deleteunassigned
while @@fetch_status = 0
begin
exec spDeleteCustContbypk @deleteunassigned
fetch next from cur_unassigned into @deleteunassigned
end
close cur_unassigned
deallocate cur_unassigned
GO
declare @deleteunassigned int
declare cur_unassigned
cursor for
SELECT DISTINCT a.cust_cont_pk
FROM cust_cont a,
cont_fold_ass b (NOLOCK)
WHERE a.cust_cont_pk != b.CUST_CONT_PK
open cur_unassigned
FETCH NEXT FROM cur_unassigned INTO @deleteunassigned
while @@fetch_status = 0
begin
exec spDeleteCustContbypk @deleteunassigned
FETCH NEXT FROM cur_unassigned INTO @deleteunassigned
end
close cur_unassigned
deallocate cur_unassigned
GO
Future guru in the making.
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May 4, 2006
I have a stored procedure spUpdateClient, which takes as params a number of properties of a client application that wants to register its existence with the database. The sp just needs to add a new row or update an existing row with this data.
I tried to accomplish this with code somethign like this. (The table I'm updating is called Client, and its primary key is ClientId, which is a value passed into the sp from the client.)
IF (SELECT COUNT(ClientId) FROM Clients WHERE ClientId=@ClientId) = 0
BEGIN
-- client not found, create it
INSERT INTO Clients (ClientId, Hostname, Etc)
VALUES (@ClientId, @Hostname, @Etc)
END
ELSE
BEGIN
-- client was found, update it
UPDATE Clients
SET Hostname=@Hostname, Etc=@Etc
WHERE ClientId=@ClientId
END
But the client apps call this every second or so, so soon enough I started getting primary key violations. It looks like one client would make two calls nearly at the same time, both would get a 0 value on the SELECT line, so both would try to insert a new row with the same ClientId. No good.
So then I added
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
BEGIN TRANSACTION
at the top, and a COMMIT at the bottom. I thought the first one in would get to run the whole sp, and the next one in would have to wait for the first to be done.
Instead I'm now getting deadlock errors.
If I understand the docs right, that's because the exclusive lock is not placed on the Clients table until the INSERT happens, not at the SELECT. So when two calls to the sp happen at nearly the same time (call them A and B), A does the SELECT and that locks Clients so nobody else can update it. Then B does the SELECT, locking Clients so nobody else (including A) can update it. Now A needs to exclusively lock Clients to do its INSERT, but B still has that read lock on it, and they're deadlocked.
I could catch the deadlock in my client app after SQL Server kills one of the transactions, but it seems to me there should be some way to set a lock at the top of the sp that says "nobody else can enter this sp until I exit it". Any such thing?
Thanks.
Nate Hekman
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Dec 8, 2007
To minimize the very large number of stored procedures typicallyassociated with an application, I have gotten in the habit ofcombining a select, insert, update, and delete all in one procedure,and passing an argument to indicate which to use. (I use defaultvalues for all input params to avoid having to declare them forselects and deletes.) So I'll have just one PersonAdmin proc insteadof PersonGet, PersonInsert, PersonUpdate, and PersonDelete procsWhile this is nice for housekeeping, I wonder what the compiler doeswith such an architecture,and I fear the worst. The select returns arecordset; the others don't.Is this a bad idea?If it is, I really wish SQL would permit some sort of user folderstructure in the proc list.
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Sep 7, 2007
Hello.
I have been developing a small site that has two backend SQL Server databases. One for my application data and one for the ASPNETDB database that is created by the ASP .NET Configuration utility.
Is it possible to configure the ASP .NET Configuration tool to use my custom database instead of creating a second database called ASPNETDB?
Thanks in advance.
Kev
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Aug 5, 2004
I am exclusively using Stored Procedures to access the database, i.e. there are no Ad-Hoc SQL statements anywhere in the C# code. However, one thing I need to be able to do is to allow filtering for data grids on my ASP.NET page. I want to do the filtering in the Stored Procedure using Dynamic SQL to set the WHERE clause. However, one fear of mine is SQL injection from the client. How can I avoid arbitrary SQL injection, yet still allow for a dynamic WHERE clause to be passed into the stored procedure?
Jason Pacheco
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Jun 9, 2008
Hello all,
I currently have an asp script that is generating a 12 month rolling report. From asp I'm running a for loop with 12 iterations, each one sending the following query:
select count(a.aReportDate) as ttl from findings f left outer join audits a on a.aID = f.auditID
where f.findingInvalid <> 1 and month(aReportDate) = " & Mo & " and year(aReportDate) = " & Yr
where the Mo and Yr variables are incremented accordingly.
I actually have 4 sets of data being pulled back to populate a graph, so this results in 48 queries with each page load! Obviously not ideal. So I'm hoping to reduce this to 4 queries. I was playing with the following in enterprise manager:
DECLARE @DT DATETIME
DECLARE @CNT INT
SET @DT = '10/31/07'
SET @CNT = 1
WHILE(@CNT < 12)
BEGIN
select count(a.aReportDate) as ttl from findings f left outer join audits a on a.aID = f.auditID
where f.findingInvalid <> 1 and month(aReportDate) = month(@DT) and year(aReportDate) = year(@DT)
SET @CNT = @CNT + 1
END
I haven't yet added any logic to increment the date, but my concern is that it looks like it is returning 12 separate results. Is there any way to combine this all into one resultset that will be passed back to my asp script? Hopefully this makes sense?
Suggestions on a completely different approach would also be welcome.
Thanks!
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Mar 2, 2007
Hi,
Hope someone could help me in revising a long running query. Here is the query
select *
from table1
where classid is null
and productid not in (
select productid
from table1
where classid = 67)
In here table1 could have several occurance of productid in which productid could have different classid. The possible values of classid are: NULL,1,2,3,67. Basically I am looking for all records whose classid is null but should never had an instance in table1 where its classid is 67.
Do you have something like a "join" statment that will only include all records in the left table that is not in the right table?
Hope someone could help me with this. Thanks in advance.
-Ruel
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Oct 8, 2007
MS SQL Server 2005
I have a table in our system that hold temporary data for doing calculations. It will process several million records in it. each time they forecast our products.....
Is there any way to have the SQL server NOT add these transactions to the transaction log, since I'm going to wipe the data anyway? I'd like to be able to pick and choose the tables that are 'backed up' into the transaction log...
Please advice. Thanks
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Mar 18, 2008
I am trying to figure out an efficient way of comparing two tables of identical structure and primary keys only I want to do a join where one of the tables reveals values for records which have been modified and/or updated.
To illustrate, I have two tables in the generic form:
id-dt-val
For which the 'val' in table 2 could be different from the 'val' in table 1 - for a given id-dt coupling that are identical in both tables.
Does anyone know of an efficient way I could return all id-dt couplings in table 2 which have values that are different from those with the same id-dt couplings in table 1?
NOTE: I am asking this because I am trying to avoid explicit comparisons between the 'val' columns. The tables I am working with in actuality have roughly 900 or so columns, so I don't want this kind of a monster query to do (otherwise, I would simply do something like where a.id = b.id and a.dt = b.dt and a.val <> b.val) - but this won't do in this case.
As a sample query, I have the following script below. When I attempt the where not exists, as you might expect, I only get the one record in which the id-dt coupling is different from those in table 1, but I'm not sure how to return the other records where the id-dt coupling is the same in table 1 but for where modified values exist:
create table #tab1
(
id varchar(3),
dt datetime,
val float
)
go
create table #tab2
(
id varchar(3),
dt datetime,
val float
)
go
insert into #tab1
values
('ABC','01/31/1990',5.436)
go
insert into #tab1
values
('DEF','01/31/1990',4.427)
go
insert into #tab1
values
('GHI','01/31/1990',7.724)
go
insert into #tab2
values
('XYZ','01/31/1990',3.333)
go
insert into #tab2
values
('DEF','01/31/1990',11.111)
go
insert into #tab2
values
('GHI','01/31/1990',12.112)
go
select a.* from #tab2 a --Trouble is, this only returns the XYZ record
where not exists
(select b.* from #tab1 b where a.id = b.id and a.dt = b.dt)
go
drop table #tab1
drop table #tab2
go
I really dont' want to have to code up a loop to do the value by value comparison for inequality, so if anyone knows of an efficient set-based way of doing this, I would really appreciate it.
Any advice appreciated!
-KS
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Jul 20, 2005
The C++ application calls the database to look up property data. Onetroublesome query is a function that returns a table, finding data whichis assembled from four or five tables through a view that has a join,and then updating the resulting @table from some other tables. Thereare several queries inside the function, which are selected accordingto which parameters are supplied (house #, street, zip, or perhaps parcelnumber, or house #, street, town, city,...etc.). If a lot of parametersare provided, and the property is not in the database, then several queriesmay be attempted -- it keeps going until it runs out of queries or findssomething. Usually it takes ~1-2 sec for a hit, but maybe a minute insome failure cases, depending on the distribution of data. (~100 milproperties in the DB) Some queires operate on the assumption the input datais slightly faulty, and take relatively a long time, e.g., if WHEREZIP=@Zip fails, we try WHERE ZIP LIKE substring(@Zip,1,3)+'%'. Whileall this is going on the application may decide the DB is never going toreturn, and time out; it also seems more likely to throw an exception thelonger it has to wait. Is there a way to cause the DB function to fail ifit takes more than a certain amount of time? I could also recast it asa procedure, and check the time consumed after every query, and abandonthe search if a certain amount of time has elapsed.Thanks in advance,Jim Geissman
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Jun 8, 2007
What is the experession to evaluate if the result of a computation would be a divide by zero error for a text box in report?
IIF(divide by zero, display nothing, else display computed result)...??
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Dec 4, 2007
I have a Master/Detail table setup - let's call the master "Account" and the detail "Amount". I also have a "black box" stored procedure (BlackBox_sp) which carries out a lot of complex processing.
What I need to do is, for each Account, I need to iterate thtough it's Amount records and call the black box each time. Once I've finished going through all the Amount records, I need to call the black box again once for the Account. This must be done with the Account & Amount rows in a specific order.
So I have something along the lines of
Code Block
DECLARE Total int
DECLARE Account_cur
OPEN Account_cur
FETCH NEXT FROM Account_cur
WHILE FETCH_STATUS = 0
BEGIN
SET Total = 0
DECLARE Amount_cur
OPEN Amount_cur
FETCH NEXT FROM Amount_cur
WHILE FETCH_STATUS = 0
BEGIN
SET Total = Total + Amount
EXEC BlackBox_sp (Amount)
END
CLOSE Amount_cur
EXEC BlackBox_sp (Total)
END
CLOSE Account_cur
Any tips on another approach would be appreciated given the contraints I have.
Greg.
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Mar 27, 2008
I have web site when people orders through website at same time, a problem can be arrive when allocating next primary key value to new record, using maximum number of records +1
how to avoid this problem and insert to sql server
please give me your ideas
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Mar 7, 2001
Hi there,
I'm using a query to fetch data from a table where one of the criteria is IN(...) clause for the key column of the table.Now the data being retrieved is ordered by the key column of the table even though I haven't specified any order by clause.
I want to know if there a way in which the data being fetched is in the order of my IN(...) clause.
Thanx
Aby
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