Calling Functions Within An Exec() Block
Feb 27, 2007
I have an exec() statement in a stored procedure:
Code:
exec('insert into foo
select a, b, c, dbo.bar(d, e)
from baz')
dbo.bar() is a function defined elsewhere. It works OK
by itself.
Getting this error when running the stored procedure:
Code:
Could not locate entry in sysdatabases for database 'bar'. No entry found with that name.
How do I force SQL Server to recognize the function's name?
Thanks.
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Sep 1, 2006
Hi,
I need to pass a table name and id to a function and return a row count
I need to use EXEC or SP_EXECUTESQL to run dynamic SQL
It wont work in functions. Following is my function
alter FUNCTION [dbo].[GetRowCount] (@TblName NVARCHAR(25) , @Itemid INT)
RETURNS INT
AS BEGIN
DECLARE @RowCnt INT
set @RowCnt = 0
DECLARE @Sqlstring nvarchar(2000)
set @Sqlstring = 'SELECT @RowCnt = COUNT(*) FROM ['+ @TblName +'] WHERE Itemid = '+ convert(varchar(10),@Itemid)
EXEC @Sqlstring
RETURN @RowCnt
END
while executing this I get the following error ....
"Only functions and extended stored procedures can be executed from within a function." and "Incorrect syntax near the keyword 'EXEC' "
does anyone have any ideas of this ?
Thanks.
vidhya
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Dec 18, 2007
Hi
This is the code which I have written in code window.
Public Shared Function CalcLocalFactor(ByVal CalcLifeCode As Integer, ByVal CalcFiscalAge As Integer, ByVal CalcLifeYearsUsed As Double, ByVal CalcLocConvention As String, ByVal CalcSRate As Integer) As Double
Dim locCalcFiscalAge As Integer = 0
Dim locFactor As Double= 1.0
Dim locFactor1 As Double = 1.0
Dim REM1 As Integer = 1
Dim DEP As Double = 0
Dim YR As Integer
Dim HALF_YEAR As Double
Dim LINEAR As Double
Dim MACR As Double
If CalcFiscalAge > CalcLifeCode + 1 Then
locCalcFiscalAge = 0
locFactor = 1.0
End If
If (CalcLocConvention <> "HALF-YEAR" And CalcLifeYearsUsed < CalcLifeCode) Then
locFactor = Math.Round((CalcLifeYearsUsed / CalcLifeCode), 4)
End If
If (CalcLocConvention = "HALF-YEAR") Then
for YR = 1 to CalcFiscalAge step 1
If YR = CalcLifeCode + 1 Then
locFactor1 = 1
Exit For
End If
If (YR = 1 Or YR = CalcFiscalAge) Then
HALF_YEAR = 2
Else
HALF_YEAR = 1
End If
LINEAR = Math.Round(REM1 / (CalcLifeCode - YR + 1.5) / HALF_YEAR, 4)
MACR = Math.Round(REM1 / CalcLifeCode * CalcSRate / HALF_YEAR, 4)
If MACR >= LINEAR Then
DEP = MACR
Else
DEP = LINEAR
End If
locFactor1 = locFactor1 + DEP
REM1 = 1 - locFactor1
locFactor = locFactor1
Next
End If
Return locFactor
End Function
I'm calling this code in a Report Parameter like below:
=Code.CalcLocalFactor(Parameters!CalcLifeCode.Value,Parameters!CalcFiscalAge.Value,Parameters!CalcLifeYearsUsed.Value,Parameters!CalcLifeYearsUsed.Value, Parameters!CalcSRate.Value )
It is working fine for the first record where as for other records, the value is not getting changed. i.e. the first records value is coming repeatedly for all other records also.
How can I dynamically change the parameter values of the function?
Parameter is not accepting directly the field names, hence I used other parameter to initialize the field and used that parameter for this.
Ex. Parameter Name ; FieldPurchDate (internal) FieldName : PURCHDATE
Other parameter: FieldInDate (internal) FieldName : InDate
While initializing the new parameter CalcPurchDate,, I used an expression for this: Parameters!CalcFiscalAge.Value
=iif(Parameters!FieldPurchDate.Value is nothing, Parameters!FieldInDate.Value,Parameters!FieldPurchDate.Value)
and using this CalcPurchDate for processing of the parameter:
These are some of the things , I am doing ....
Please let me know how to fix this issue...
Thanks in advance
Regards,
Radhika
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Mar 5, 2008
I'm using MS SQL Server 2005.
I want to simulate a table, using a Multi-statement Table-Value User-Defined Function, but I need the function build the SQL statement from scratch each time so I can dynamically define values like the table it references. The only way I know how to run the query after it has been defined in this manner is to run an EXEC command. However I'm getting an error basically saying that the EXEC command is off limits in a User Defined Function.
The Exsact Error is:
>[Error] Script lines: 1-108 ------------------------
Invalid use of side-effecting or time-dependent operator in 'EXECUTE STRING' within a function.
Is there some way to get around this limitation of User Defined Functions. Or perhaps a way to simulate the functionality of Multi-statement Table-Value User-Defined Functions in a Store Procedure, specifically the ability to run where statements, or transform the data on the fly without re-writing the Stored Procedure every time.
The code I’m trying to run is below.
(Note: The code works as a stored procedure, so I'm sure that the core of the statment is correct)
CREATE FUNCTION [dbo].[TrendLine]
(
@Summary as smallint,
@Start as datetime,
@End as datetime,
@Table as varchar(100),
@X as varchar(100),
@Count as varchar(100),
@Duration as varchar(100)
)
RETURNS
@TrendLineTable table (
DATE_DAY datetime
, EQ_REGION varchar(25)
, EQ_MARKET_CLUSTER varchar(30)
, Y float
, X int
, DURATION float
, FORMULA varchar(100)
, a float
, b float
, EX int
, EY float
, EX2 int
, EXY float
, N int
)
AS
BEGIN
DECLARE @SQL as varchar(3000)
, @CountText as varchar(150)
, @StartText as varchar(50)
, @EndText as varchar(50)
SET @StartText = 'cast( ' + char(39) + cast( @Start as varchar(20) ) + char(39) + ' as datetime ) '
SET @EndText ='cast( ' + char(39) + cast( @End as varchar(20) ) + char(39) + ' as datetime ) '
IF @Summary = 1
BEGIN
SET @CountText = 'sum'
END
ELSE
BEGIN
SET @CountText = 'count'
END
SET @SQL = 'INSERT INTO @TrendLineTable
DECLARE TrendlineC cursor for
SELECT a.DATE_DAY
, s2.EQ_REGION
, s2.EQ_MARKET_CLUSTER
, ( ( EY - ( b * EX ) ) / N ) + ( b * X ) AS Y
, X
, Y AS DURATION
, cast( b as varchar(100) ) + ' + char(39) + 'x + ' + char(39) + ' + cast( ( EY - ( b * EX ) ) / N as varchar(100) ) AS FORMULA
, ( EY - ( b * EX ) ) / N AS a
, b
, EX
, EY
, EX2
, EXY
, N
FROM (
SELECT EQ_REGION
, EQ_MARKET_CLUSTER
, sum( X ) AS EX
, sum( Y ) AS EY
, sum( X2 ) AS EX2
, sum( XY ) AS EXY
, count( X ) AS N
, ( ( count( X ) * sum( XY ) ) - ( sum( X ) * sum( Y ) ) ) / ( ( count( X ) * sum( X2 ) ) - POWER( sum( X ), 2 ) ) AS b
FROM (
SELECT ' + @X + ' AS DATE_DAY
, EQ_REGION
, EQ_MARKET_CLUSTER
, row_number() over (partition by EQ_MARKET_CLUSTER order by ' + @X + ' ) AS X
, cast( sum( ' + @Duration + ' ) as float ) / ' + @CountText + '( ' + @Count + ' ) AS Y
, POWER( row_number() over (partition by EQ_MARKET_CLUSTER order by ' + @X + ' ), 2) X2
, row_number() over (partition by EQ_MARKET_CLUSTER order by ' + @X + ' ) * cast( sum( ' + @Duration + ' ) as float ) / ' + @CountText + ' ( ' + @Count + ' ) AS XY
FROM ' + @Table + '
WHERE ' + @X + ' >= ' + @StartText + '
AND ' + @X + ' < ' + @EndText + '
GROUP BY ' + @X + '
, EQ_REGION
, EQ_MARKET_CLUSTER
) s1
GROUP BY EQ_REGION
, EQ_MARKET_CLUSTER
) s2
INNER JOIN (
SELECT ' + @X + ' AS DATE_DAY
, EQ_MARKET_CLUSTER
, row_number() over (partition by EQ_MARKET_CLUSTER order by ' + @X + ' ) AS X
, cast( sum( ' + @Duration + ' ) as float ) / ' + @CountText + '( ' + @Count + ' ) AS Y
FROM ' + @Table + '
WHERE ' + @X + ' >= ' + @StartText + '
AND ' + @X + ' < ' + @EndText + '
GROUP BY ' + @X + '
, EQ_REGION
, EQ_MARKET_CLUSTER
) a ON s2.EQ_MARKET_CLUSTER=a.EQ_MARKET_CLUSTER'
EXEC ( @SQL )
RETURN
END
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Nov 12, 2007
I have seen a couple of references to "EXEC AT" in relation to linked servers, that can be used to call Oracle Stored Procedures, in the TechNet postings. Based on the postings, this is new functionality in SQL Server 2005, but I am unable to find any reference to this in the Online Documentation for SQL Server 2005.
Could someone point me in the right direction for documentation of the feature?
TIA
Paul Watje
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Nov 23, 2004
Dear Everybody,
Hi again!
Supposing I have an SQL Server Function named Fxn1 which returns a VARCHAR(6) value. I want to use this returned value in another function named Fxn2 but Fxn2 accepts a parameter of type INT. Fxn2 itself returns an INT value. This has to be achieved in a single line.
The following line of code will not work in SQL Server. How should I achieve this?
declare @Res INT
EXEC @Res = Fxn2 (CONVERT( INT, Fxn1 ))
Thanx in advance!
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Mar 16, 2006
I have a rather complex function (part of a production planning engine) that is written in VBA, and is part of my front end app. I'd like to be able to somehow call this function from either a sproc or DTS package in SQL. Is this possible, or am I going to have to convert the function to a SQL sproc (ugh)?
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May 22, 2008
Hello,
I need to find out what functions and stored proceudres call a specific function in my database. Does anyone know how to accomplish this?
Thanks!
Dave
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Jul 14, 2015
here's an example of what I am trying to do.
--Exec Database.Employees
--Use Database
--Go
--Create PROCEDURE AEM.TempTable
--AS
--BEGIN
--Select * into #emptemp From Database.Employees
--End
--Select * From #emptemp
Is something like this possible? I can get the EXEC to run the "Select * into #emptemp From Database.Employees" statement, but when I try to use the temp table it doesnt see it.
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Apr 11, 2004
Hey guys, I recently found out u can actaully JOIN tables that are on different dbs as long as they are on the same SQL Server by specifying [DATABASE].[DATABASEOWNER].[TABLE]. I now have a question tho. Can you access functions the same way? i have tried using the same syntax, but I get an error saying 'Invalid object name'
Any help would be great.
Thanks!
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Apr 11, 2007
Hi, I am writing a stored proc that will so a very simple search for users in the database. In my database I am storing a birthday as a datetime column called 'bday'. Users can search for people between a certain age range; say 23 - 30.
Here is my search query:
alter procedure sp_wm_quickSearch
@lookingFor int,
@mySex int,
@country varchar(500),
@ageTo int,
@ageFrom int,
@state varchar(10),
@userid int
as
select * from
wm_user a
inner join
wm_user_details b
on
a.userid=b.userid
where
a.lookingfor = 0 and
a.sex = 1 and
a.country = 'United States of America' and
a.state = 'Washington'
I found a simple function that looks like it can do what i need it to do:
CREATE FUNCTION dbo.fnYearsApart
(
@FromDate DATETIME,
@ToDate DATETIME
)
RETURNS INT
AS
BEGIN
RETURN CASE
WHEN @FromDate > @ToDate THEN NULL
WHEN DATEPART(day, @FromDate) > DATEPART(day, @ToDate) THEN DATEDIFF(month, @FromDate, @ToDate) - 1
ELSE DATEDIFF(month, @FromDate, @ToDate)
END / 12
END
MY QUESTIONS IS THIS:
How do I call this function in my query and pass it the age, and use the age as a search param. I imagine it woudl look something like this:
select * from
wm_user a
inner join
wm_user_details b
on
a.userid=b.userid
where
a.lookingfor = 0 and
a.sex = 1 and
a.country = 'United States of America' and
a.state = 'Washington' and
fnYearsApart(a.bday, Some DateTime.Now function) < 24 and > 30
but this line doesn't work: (obviously i need to replace datetime.now
fnYearsApart(a.bday, Some DateTime.Now function) < 24 and > 30
Thanks!
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Apr 23, 2008
Hi ,
I have a question about calling functions in SQl Server 2005.
Let's say that I have created as a dbo a function called Calculations.
If I want to call it from T-SQL I will write Select dbo.Calculations (arguments if any) etc.
My question is If I can skip the "dbo" part. Call the function without using the dbo .
Can I do that ?
Should I create the function as supervisor ? Does Sql Server has a property or something which will allow me to call the function without using the "dbo." ?
Thank you
zkar
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Jun 28, 2006
I have a number of databases that require a set of common functions. I'd like to place all those functions in a central DB. I'm having trouble calling them using the syntax FunctionDB.GetParamLength() for example, which works within the FunctionDB database.
Any ideas/suggestions? I really don't want to maintain seperate copies of the functions across 5+ databases.
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Jul 20, 2005
Hi,I alredy tried to search this problem in last posts, but I couldn'tfind the answer.I try to access via Extended SP the method in a dll.I registered the dll as a ExSP, with a name of method. But aftercalling it in T-SQL, I became such a error message:[Microsoft][ODBC SQL Server Driver][SQL Server]Cannot find thefunction SendGeneralNotify_FromA in the library [LibraryName.dll].Reason: 127(error not found).In this dll I have only one class an it has events, properities andmethods.I will to call one of these methods.aha ... very importand. Please don't say that this dll should bewritten in c++ because it is made like that (no VB).Maybe somebody of you have an example how I should call it, to becamean access on this dll?Sorry for my not well english.With best regards, looking forward for reply-----------------------------MatikJoin Bytes!
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Nov 9, 2006
Hi
We have a user-defined function that can be called directly via SQL (in SQL Server Management Studio) without error. We would like to use this function to populate a column, whist data is being processed within Integration Services. Using an OLE DB Command transformation to achieve this would seem the most appropriate.
The following was inserted for the SQLCommand property:
EXEC ? = dbo.GetOrderlineStatus(@dt_required = ?, @dt_invoice = ?, @dt_despatch = ?, @ch_status = ?, @si_suffix = ?, @re_quantity = ?, @vc_invoice_id = ?, @vc_order_id = ?)
However, when the Refresh button is pressed we are presented with the error below:
Error at Load Orderline [OLE DB Command [15171]]: An OLE DB error has occurred. Error code: 0x8004E14. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x8004E14 Description: "Invalid parameter number".
If we use SET instead of EXEC (e.g. SET ? = dbo.GetOrderlineStatus(@dt_required = ?, @dt_invoice = ?, @dt_despatch = ?, @ch_status = ?, @si_suffix = ?, @re_quantity = ?, @vc_invoice_id = ?, @vc_order_id = ?)) the following error is produced:
Error at Load Orderline [OLE DB Command [15171]]: An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Syntax error, permission violation, or other nonspecific error".
Any assistance would be greatly appreciated.
Thanks
Neil
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Dec 3, 2014
I have the following stored procedure to test scope of variables
alter proc updatePrereq
@pcntr int,
@pmax int
as
begin
[Code] ....
In the above script @i is declare in the if block only when the @pcntr value is 1. Assume the above stored procedure is called 5 times from this script
declare @z int
set @z = 1
declare @max int
set @max = 5
while @z <= @max
begin
exec dbo.updatePrereq @z, @max
set @z = @z + 1
end
go
As i said earlier `@i` variable exists only when `@pcntr` is `1`. Therefore when i call the stored procedure for the second time and so forth the control cannot enter the if block therefore @i variable wouldn't even exist. But the script prints the value in `@i` in each iteration, How comes this is possible should it throw an error saying `@i` variable does not exist when `@pcntr` values is greater than `1`?
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May 26, 2006
I was playing around with the new SQL 2005 CLR functionality andremembered this discussion that I had with Erland Sommarskog concerningperformance of scalar UDFs some time ago (See "Calling sp_oa* infunction" in this newsgroup). In that discussion, Erland made thefollowing comment about UDFs in SQL 2005:[color=blue][color=green]>>The good news is that in SQL 2005, Microsoft has addressed several of[/color][/color]these issues, and the cost of a UDF is not as severe there. In fact fora complex expression, a UDF in written a CLR language may be fasterthanthe corresponding expression using built-in T-SQL functions.<<I thought the I would put this to the test using some of the same SQLas before, but adding a simple scalar CLR UDF into the mix. The testinvolved querying a simple table with about 300,000 rows. Thescenarios are as follows:(A) Use a simple CASE function to calculate a column(B) Use a simple CASE function to calculate a column and as a criterionin the WHERE clause(C) Use a scalar UDF to calculate a column(D) Use a scalar UDF to calculate a column and as a criterion in theWHERE clause(E) Use a scalar CLR UDF to calculate a column(F) Use a scalar CLR UDF to calculate a column and as a criterion inthe WHERE clauseA sample of the results is as follows (time in milliseconds):(295310 row(s) affected)A: 1563(150003 row(s) affected)B: 906(295310 row(s) affected)C: 2703(150003 row(s) affected)D: 2533(295310 row(s) affected)E: 2060(150003 row(s) affected)F: 2190The scalar CLR UDF function was significantly faster than the classicscalar UDF, even for this very simple function. Perhaps a more complexfunction would have shown even a greater difference. Based on this, Imust conclude that Erland was right. Of course, it's still faster tostick with basic built-in functions like CASE.In another test, I decided to run some queries to compare built-inaggregates vs. a couple of simple CLR aggregates as follows:(G) Calculate averages by group using the built-in AVG aggregate(H) Calculate averages by group using a CLR aggregate that similatesthe built-in AVG aggregate(I) Calculate a "trimmed" average by group (average excluding highestand lowest values) using built-in aggregates(J) Calculate a "trimmed" average by group using a CLR aggregatespecially designed for this purposeA sample of the results is as follows (time in milliseconds):(59 row(s) affected)G: 313(59 row(s) affected)H: 890(59 row(s) affected)I: 216(59 row(s) affected)J: 846It seems that the CLR aggregates came with a significant performancepenalty over the built-in aggregates. Perhaps they would pay off if Iwere attempting a very complex type of aggregation. However, at thispoint I'm going to shy away from using these unless I can't find a wayto do the calculation with standard SQL.In a way, I'm happy that basic SQL still seems to be the fastest way toget things done. With the addition of the new CLR functionality, Isuspect that MS may be giving us developers enough rope to comfortablyhang ourselves if we're not careful.Bill E.Hollywood, FL------------------------------------------------------------------------- table TestAssignment, about 300,000 rowsCREATE TABLE [dbo].[TestAssignment]([TestAssignmentID] [int] NOT NULL,[ProductID] [int] NULL,[PercentPassed] [int] NULL,CONSTRAINT [PK_TestAssignment] PRIMARY KEY CLUSTERED([TestAssignmentID] ASC)--Scalar UDF in SQLCREATE FUNCTION [dbo].[fnIsEven](@intValue int)RETURNS bitASBEGINDeclare @bitReturnValue bitIf @intValue % 2 = 0Set @bitReturnValue=1ElseSet @bitReturnValue=0RETURN @bitReturnValueEND--Scalar CLR UDF/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;public partial class UserDefinedFunctions{[Microsoft.SqlServer.Server.SqlFunction(IsDetermini stic=true,IsPrecise=true)]public static SqlBoolean IsEven(SqlInt32 value){if(value % 2 == 0){return true;}else{return false;}}};*/--Test #1--Scenario A - Query with calculated column--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignment--Scenario B - Query with calculated column as criterion--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignmentWHERE CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END=1--Scenario C - Query using scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario D - Query using scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--Scenario E - Query using CLR scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario F - Query using CLR scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--CLR Aggregate functions/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct Avg{public void Init(){this.numValues = 0;this.totalValue = 0;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;}}public void Merge(Avg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;}}public SqlDouble Terminate(){if (numValues == 0){return SqlDouble.Null;}else{return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;}[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct TrimmedAvg{public void Init(){this.numValues = 0;this.totalValue = 0;this.minValue = SqlDouble.MaxValue;this.maxValue = SqlDouble.MinValue;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;if (Value < this.minValue)this.minValue = Value;if (Value > this.maxValue)this.maxValue = Value;}}public void Merge(TrimmedAvg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;if (Group.minValue < this.minValue)this.minValue = Group.minValue;if (Group.maxValue > this.maxValue)this.maxValue = Group.maxValue;}}public SqlDouble Terminate(){if (this.numValues < 3)return SqlDouble.Null;else{this.numValues -= 2;this.totalValue -= this.minValue;this.totalValue -= this.maxValue;return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;private SqlDouble minValue;private SqlDouble maxValue;}*/--Test #2--Scenario G - Average Query using built-in aggregate--SELECT ProductID, Avg(Cast(PercentPassed AS float))FROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario H - Average Query using CLR aggregate--SELECT ProductID, dbo.Avg_CLR(Cast(PercentPassed AS float)) AS AverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario I - Trimmed Average Query using built in aggregates/setoperations--SELECT A.ProductID,CaseWhen B.CountValues<3 Then NullElse Cast(A.Total-B.MaxValue-B.MinValue ASfloat)/Cast(B.CountValues-2 As float)End AS AverageFROM(SELECT ProductID, Sum(PercentPassed) AS TotalFROM TestAssignmentGROUP BY ProductID) ALEFT JOIN(SELECT ProductID,Max(PercentPassed) AS MaxValue,Min(PercentPassed) AS MinValue,Count(*) AS CountValuesFROM TestAssignmentWHERE PercentPassed Is Not NullGROUP BY ProductID) BON A.ProductID=B.ProductIDORDER BY A.ProductID--Scenario J - Trimmed Average Query using CLR aggregate--SELECT ProductID, dbo.TrimmedAvg_CLR(Cast(PercentPassed AS real)) ASAverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID
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Oct 31, 2007
I have two SQL Server 2000 (one is localhost, one is remote with VPN IP 192.168.5.4).
I can select * from [192.168.5.4].db.dbo.test but I can't exec [192.168.5.4].db..spAdd in localhost.
These select and sp is OK for 1 or 2 week without any problem,but it didn't work one day.
Can some one explain why?
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Apr 8, 2008
I've written a couple blocks but I have no idea when it comes to this one.
Create a PL/SQL block to retrieve the last name and department ID if each employee from the EMPLOYEES table
for those employees whose EMPLOYEE_ID is less than 114. From the values retreived from the employees table, populate two PL/SQL tables,
one to store the records of the employee last names and the other to store the records of their department IDs.
Using a loop, retreive the employee name information and salary infromation from the PL/SQL tables and doisplay it in the window,
using DBMS_OUTPUT.PUT_LINE. Display these details for the first 15 employees in the PL/SQL tables.
Any help helps
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May 18, 2006
If I've got a 64-bit OS such as Windows XP Professional x64 Edition running and I have the SQL Server 2005 Express Edition, is AES permittable or does TRIPLEDES still need to be used?
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Apr 10, 2008
Hello,
I have been experiencing a lot of blocking activity in my database. My trace results show that the following extended stored procedures sp_prepexec and sp_cursorfetch are executed by both the user causing the block and the user tha is blocked. Any ideas as to how to rectify this situation will be appreciated.
Regards,
Albert
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Dec 11, 2006
HI,
i'm trying to execute some sql using the Try.. Catch blocks.
Following code does not execute in Catch Block
Begin
begin try
insert into dbo.Test values (1,'aaa')
-- here we are inserting int value in identity field...
END TRY
Begin catch
PRINT 'TEST'
SELECT
ERROR_NUMBER() AS ErrorNumber,
ERROR_SEVERITY() AS ErrorSeverity,
ERROR_STATE() as ErrorState,
ERROR_PROCEDURE() as ErrorProcedure,
ERROR_LINE() as ErrorLine,
ERROR_MESSAGE() as ErrorMessage;
END Catch
End
GO
Whereas the following block works fine and the Catch block executes.
Begin
begin try
Select 1/0
--This causes an error.
END TRY
Begin catch
PRINT 'TEST'
SELECT
ERROR_NUMBER() AS ErrorNumber,
ERROR_SEVERITY() AS ErrorSeverity,
ERROR_STATE() as ErrorState,
ERROR_PROCEDURE() as ErrorProcedure,
ERROR_LINE() as ErrorLine,
ERROR_MESSAGE() as ErrorMessage;
END Catch
End
GO
Any idea why is it so?
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Mar 5, 2008
Can anyone guide me to write check block in SQL Server?
I Mean if blocking occurs, just inform people.
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Mar 18, 2008
Hi there! I need such thing: I have a data in Table A. When I get this data, I also increment this data by one, what I want is block Table A in order to other people will not get access to data.. I think about transactions, but are transactions reaaly blocks a table's content?
P.S. For example in MySQL there are Lock table command for blocking table for reading/writing. I need such thing/
Thanks
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Jul 3, 2007
Hi to everybody,
i have this problem.
sometimes a process in my SQL Server 2005 (upd 2) is blocked from itself. If I find in monitor it wait for a lock_M_Sch_M on a temporary table as you can see from
select * from sys.dm_tran_locks where request_session_id=51 and request_status <> 'GRANT'
resorce type : OBJECT
resource id : 218899226
request mode : Sch-M
request status WAIT
request_session id : 51
request life time : 33554432
or from
SELECT * FROM sys.dm_os_waiting_tasks WHERE SESSION_ID=51
waiting task address : 0x0000000000C2F198
session id : 51
wait type : LCK_M_SCH_M
resource address : 0x0000000201C71300
blocking task address : 0x0000000000C2F198
blocking session id = 51
resource description objectlock lockPartition=0 objid=218899226 subresource=FULL dbid=2 id=lock80d04900 mode=Sch-S associatedObjectId=218899226
I resolve this problem only with restart of sql server . that clear tempdb and eliminate this process
I think is not a problem about latch present from sql server 2000 sp4 (I read some document abount this problem)
So I haven't idea how to resolve this problem and how to kill this kind of process without to restart sql server
thanks in advance
Luca
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Oct 25, 2007
hi there,
to retrieve more then one record with a cursor we can use block cursor, so we have to set the cursor attribute SQL_ATTR_ROWSET_SIZE to some number...i am not getting any code example on this.
do anyone know this???
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Apr 12, 2006
Hi:
one of our study group members noticed a strange behavior and has the following question. Any thoughts are appreciated.
I am unable to understand as to why the CATCH block is not executed when an INSERT is made
On table T3 which is dropped after the first transaction.
The severity of Insert into t3 values (3) is Msg 208, Level 16, State 1, Line 2
Invalid object name 't3'.
BOL says TRY€¦CATCH constructs do not trap the following conditions:
Warnings or informational messages with a severity of 10 or lower.
Errors with severity of 20 or higher that terminate the SQL Server Database Engine task processing for the session. If an error occurs with severity of 20 or higher and the database connection is not disrupted, TRY€¦CATCH will handle the error.
Here is the script.
use tempdb
go
create table t1 (a int)
create table t2 (b int)
create table t3 (c int)
Begin tran
Insert into t1 values (1)
Insert into t2 values (2)
Insert into t3 values (3)
IF @@error <> 0
Rollback tran
else
commit tran
-------------------------------------------------------------
Select * from t1
Select * from t2
Select * from t3
-------------------------------------------------------------
Drop table t3
-------------------------------------------------------------
Set xact_abort on
Begin try
Begin tran insertNow
Insert into t1 values (1)
Insert into t2 values (2)
save tran insertNow
Insert into t3 values (3)
commit tran insertNow
End try
Begin Catch
IF (XACT_STATE()) = -1
BEGIN
PRINT 'The transaction is in an uncommittable state.' +
' Rolling back transaction.'
ROLLBACK TRANSACTION insertNow
END;
-- Test if the transaction is active and valid.
IF (XACT_STATE()) = 1
BEGIN
PRINT 'The transaction is committable.' +
' Committing transaction.'
COMMIT TRANSACTION insertNow
END
End Catch
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Oct 2, 2006
Hi all,
here my question :
I have 2 applications.
connection 1.
one does select max(grp) from orv and one does select max(grp) from orh. orh is the historical file from orv. We did this to know which is the greather grp between these 2 files.
After having did this, we add 1 at grp field.
we insert into orv the record max(grp) + 1
connection 2.
an other application could insert at the same time record in this table orv with same parameters.
my problem is the following. I need to block record in orv table either on the select ( connection 1) or Insert ( connection 2) to avoid having select max(grp) + 1 on orv at connection 1 and Insert a record into orv at connection 2.
I believe I need to use HOLDLOCK, UPDLOCK.
but I have not the habitude to use them.
Can I do this ?
connection 1
select max(grp) from orv WITH HOLDLOCK
connection 2
what should I use to avoid lock when I need to insert into orv. ?
thanks for your quick answer
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Feb 11, 2008
Ho do I clear a kill process blocking others to run
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May 18, 2004
Hello, everyone:
There are a lot of Access and Excel tables linked to my SQL Server (SQL2K SP3 on W2K). The end users update those likned tables. I am wondering if there is the block problem. If yes, how to prevent that? Thanks.
ZYT
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Sep 27, 2005
hi,
i've performed a test on 2 machines based on the topic above, but it doesn't seem like blocking each other... This is the context...
I've created a table call TEST_DEL i.e.
quote:CREATE TABLE test_del
(v_id INT,
desc CHAR(3)
)
In machine 1, i'm login as USER 1 and try to insert a set of records into the table
quote:
Machine 1
~~~~
BEGIN
DECLARE @li_num int,
@li_start int
SET @li_num = 100000
SET @li_start = 1
WHILE @li_start < @li_num
BEGIN
INSERT INTO test_del VALUES (@li_start, 'zzz', 'xxx')
IF (@li_start > @li_num)
BREAK
ELSE
SET @li_start = @li_start + 1
CONTINUE
END
END
In machine 2, i login in as USER 2 to retrieve the records at the same time...
quote:
SELECT * FROM test_del
but, the system still allow me to retrieve the records at the same time... May i know when will "Writer block reader, reader block writer" occur and in what situation
Thanks in advance
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Oct 10, 2006
Can anyone give a template for a stored procedure which involves a transaction and has a TRY CATCH block too...
Thanks in advance.
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Jun 14, 2006
I am writing some code generation stuff and I am trying to get a scriptlike this to work:IF (something)BEGINCREATE PROCEDURE WhateverASSELECT 1 as oneENDBut it complains about this, so I am guessing that I can't put thecreate prodcedure in an IF block.Does anyone know of a work around for this?
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