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You may receive an error message indicating that SQL Server 2000 transaction errors are being processed. There are several steps you can take to resolve this issue. We will do it shortly.
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Most iterative language compilers have built-in functionality.Error handling routines (such as TRYâ € CATCH instructions), companywhen developing your code. Although the SQL Server 2000 developers are notenjoy the luxury that many iterative language designers have when it comes to conceptbuilt-in tools, you can use these @@ ERROR system variables to create your owneffective troubleshooting tools.
Entering Transactions
To understand error handling, SQL runs on the server.In 2000, you can understand the concept of a transaction on a website for the first time. Conditions inDatabase transaction is a great set of instructions that act like a prettyUnit of work. Suppose a person has three statements that you need to make.execute. A transaction can be designed so that every two or three statementsSuccessfully or none of them show up here.
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When data processing operations are performed using SQLServer, the operation is performed in load memory, not directly onfisic dessert. Later when the SQL Server CHECKPOINT process starts,Confirmed changes are text on disk. Means that during paymentsoccur, no changes are made and are persisted to disk during the transactionnever written to disk before checking. Long-term deals guarantee moreHandling and storage requires the system to hold the locks for an extended period of time.from the moment. Hence, you need to be careful when designing as long-term transactions take place.work environment.
These are all great examples of how using transactions often helps.Withdrawing money from an ATM requires every series of steps, including depositing them.PIN by selecting the account type and entering the desired amountI want to leave. When you try to withdraw $ 50 and the machine breaks downAfter that, users no longer want to receive a $ 50 bill without receiving money.Transactions can be used to provide this consistency.
Variable @@ ERROR
Successful failure to manage SQL Server 2200 is requiredcheck constantlyThe value of the @@ ERROR system variable. Error @@A variable that is updated in the SQL Server Database Engine after two equality operators are executed on the server to establish the specified connection. This variable consists ofif necessary, the corresponding error number. A list of these error numbers can be found in the sysmessages table in the main list. Details of this table are available on the Microsoft website .
PRINT "Displayed as @@ ERROR"
PRINT @@ ERROR
In this tutorial, we are going to make the lineDisplay and print the value of @@ ERROR variable on photos. Because there is no failurereturned by expression – the screen containing the @@ ERROR value turns out to be 0.
PRINT 1/0
PRINT @@ ERROR
In this example, we are dividing by zero,means an error, the fact that the @@ ERROR variable contains 8134, which is the error numberwhich Microsoft attributes to this type of error. For various error handling purposes,You will only be affected if @@ ERROR is nonzero.indicate that an error has occurred. Is software a good idea fortracking errors?The numbers when recording errors, as they are caused byDebugging process.
Managing Errors At Work
Here is a great example of how you can use error handling instored procedures. The purpose of the template script is to execute the stored procedure.A procedure that declares a transaction and inserts a huge record into a table.Since these are only explanations, we will show you the procedure inWhy not tell him whether to commit the transaction or even rollback it.
Perform the following calculations to create a table that we will definitely use, for example:
CREATE TABLE OF TRANSACTIONS
(
TranID SMALLINT IDENTITY (1,1) PRIMARY KEY,
EntryDate SMALLDATETIME DEFAULT (GETDATE ()),
ParamValue CHAR (1), < br> ThrowError BIT
)
Two valuable scripted virtual farms are ParamValue and ThrowError. ThoseThe fields correspond to those, if you want to enter the parameters of the procedure we have created,and we will use them in your transaction validation logic.
After our booth is installed, keep an eye on everything, including ourDeals, we are ready to create manyour procedures. The procedure isA parameter that is simply placed to store a character value and even a parameter thatGive us the freedom to figure out how it works. Follow the instructions inListing A for creating a procedure.
This simple stored procedure demonstrates the properties we haveThe need for effective error management. First, the transaction is declared explicitly.After adding the ledger to the transactions table, let’s check the value@ ThrowError parameter. This parameter specifiesThe RAISERROR function is also used if an error should be raised to call the most important customs.Guilt. The when RAISERROR function is usually the value of the @@ ERROR variable.visited with the most frequently asked error number.
If there is an error in the saved plan, we will returntranslation. Ride before the transaction, that is, we startan attempt to insert into a transaction table is usually dropped as if it never existedhappened. The state of the database will be too good as beforeThe deal has begun.
In this example, you also noticed Go with theGOTOErrorHandler statement and label. GOTO instructionsgenerally considered bad prep programming in iterative programmingLanguages, but they will certainly be very helpful in troubleshooting SQL Server 2000 errors.Feel free to use the current GOTO statement for error handling.
This procedure name will cause an error and firewoodcannot be added to the transaction table:
DECLARE @ReturnCode INT
EXECUTE @ReturnCode = @ParamValue usp_TestTransaction equals 'E', @ThrowError = 1
PRINT @ReturnCode
This communication method will not throw an error with thisThe inserted data record is transferred to the “Transactions” table:
DECLARE @ReturnCode INT
EXECUTE @ReturnCode = @ParamValue usp_TestTransaction matches 'S', @ThrowError = 0
PRINT @ReturnCode
These treatment calls use a return parameter thatindicates the success or failure of a good reliable stored procedure. this is goodProgramming goes through to explicitly set the return parameter in your code toindicate the success or failure of the procedure; This allows you to see when yourThe stored procedure has failed, so you can take the necessary action to resolve the issue.problems.Fail. For example, you can nest process calls and transactions. HerApplication can promise a transaction, call a stored procedureand (depending on the success or failure of each stored procedure) commit or rollbackReturn to work from home on the street.
Looking To The Future
Careful transaction design, but also systematicValidating the value of the @@ ERROR number is the key to effective error monitoring in SQL.Server 2000. In the future I will show you how to exploit our new bug.Processing Functions in SQL Server, August 2005, TRYâ € CATCH. useStatements.
Tim Chapman is definitely a SQL Server DBA who works for a bank in Louisville, Kentucky and has over 7 years of IT experience. If you would like to give Tim a hint, email him at
Обработка ошибок транзакции SQL Server 2000
Sql Server 2000 Transaktionsfehlerbehandlung
SQL Server 2000 Transaktionsfelhantering
Gestione Degli Errori Di Transazione Di SQL Server 2000
Gestion Des Erreurs De Transaction SQL Server 2000
Sql Server 2000 Transactie Foutafhandeling
SQL Server 2000 트랜잭션 오류 처리
Manejo De Errores De Transacción De SQL Server 2000
Tratamento De Erros De Transação Do Sql Server 2000
Obsługa Błędów Transakcji SQL Server 2000
