- #Sql server deadlock error how to#
- #Sql server deadlock error update#
- #Sql server deadlock error full#
For example, if your application knows it needs 20 new IDs, do not make 20 round trips. Since our code never adds a record to this table with 0 in LastID we can make the assumption that if is 1 then the intention is append a new ID to the list, else we are updating an existing row in the list.įirst, I would avoid making a round trip to the database for every value. The code below replaces the code above from BEGIN TRANSACTION to END TRANSACTION: BEGIN TRANSACTION The general idea here is to refine the statement to eliminate unnecessary locking, and overall to make the SP more efficient. I've taken the advice that gave and modified it slightly. Anyway, this index IS used by the actual execution plan: CREATE NONCLUSTERED INDEX IX_tblIDs_IDName_LastID I've added a new index, since the existing index IX_tblIDs_Name is not being used by the SP I assume the query processor is using the clustered index since it needs the value stored in LastID.
Sample executions of the stored proc: EXEC GetNextID 'SomeTestID' SET = -2 /* no need to retry since the operation completed */ SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
#Sql server deadlock error update#
The stored procedure used to update the values stored in the table, and return the next ID: CREATE PROCEDURE nvarchar(255)ĭescription: Increments and returns the LastID value from tblIDs Some sample data: INSERT INTO tblIDs (IDName, LastID) (Īnd the nonclustered index on the IDName field: CREATE NONCLUSTERED INDEX The database itself is configured with READ_COMMITTED_SNAPSHOT = 1.įirst, here is the table: CREATE TABLE. I'm fairly certain there should be a way to access this table without any deadlocks at all.
Occasionally the stored proc gets a deadlock - I believe I've built an appropriate error handler however I'm interested to see if this methodology works as I think it does, or if I'm barking up the wrong tree here. Slides Entity Framework WCF ASP.NET Web Services Dot Net Basics C# SQL Server ADO.NET ASP.NET GridView ASP.I have a table that is used by a legacy application as a substitute for IDENTITY fields in various other tables.Įach row in the table stores the last used ID LastID for the field named in IDName. NET developer Resources available to help youĭot Net Video Tutorials Blazor tutorial C tutorial ASP.NET Core Tutorial ASP.NET Core Razor Pages Tutorial Angular 6 Tutorial Angular CRUD Tutorial Angular CLI Tutorial Angular 2 Tutorial Design Patterns SOLID Principles ASP.NET Web API Bootstrap AngularJS Tutorial jQuery Tutorial JavaScript with ASP.NET Tutorial JavaScript Tutorial Charts Tutorial LINQ LINQ to SQL LINQ to XML Entity Framework WCF ASP.NET Web Services Dot Net Basics C# SQL Server ADO.NET ASP.NET GridView ASP.NET MVC Visual Studio Tips and Tricks Dot Net Interview Questions
#Sql server deadlock error how to#
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#Sql server deadlock error full#
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