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Provides common functionality for database access to MS SQL Server.

License: MIT License

C# 99.86% Batchfile 0.14%
mssql database-access database helpers-library

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synnotech.mssqlserver's Issues

Sometimes I get an exception in ExecuteNonQueryAndDisposeAsync

We run our tests nightly and sometimes one test fails because of a System.Data.SqlClient.SqlException in the method DropAndCreateDatabaseAsync.

System.Data.SqlClient.SqlException : Only user processes can be killed.
Stack Trace:
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQueryInternal(IAsyncResult asyncResult)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQuery(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location ---
   at Synnotech.MsSqlServer.Database.ExecuteNonQueryAndDisposeAsync(SqlCommand command, CancellationToken cancellationToken)
   at Synnotech.MsSqlServer.Database.ExecuteNonQueryAndDisposeAsync(SqlCommand command, CancellationToken cancellationToken)
   at Synnotech.MsSqlServer.Database.DropAndCreateDatabaseAsync(String connectionString, CancellationToken cancellationToken)
   at Synnotech.MsSqlServer.Database.DropAndCreateDatabaseAsync(String connectionString, CancellationToken cancellationToken)

Use SetSingleUser when dropping databases

Currently, we kill all database connections (more specifically, the user sessions) when we try to drop a database. While we do not need to check if a database exists, we might end up with non-user sessions that are still connected to the database after the kill command that prevent the drop of the database. We should switch to using SET SINGLE USER WITH ROLLBACK IMMEDIATE instead.

Implement Synnotech.DatabaseAbstractions

Synnotech.MsSqlServer currently does not implement Synnotech.DatabaseAbstractions. We should change this and at least implement IAsyncSession and IAsyncReadOnlySession.

Killing connections is not enough to detach the database

One of our users reported that while trying to detach, he encountered a SqlException that the object is currently in use.

I will try to go to single-user mode instead of killing all connections to fix this issue. This never occurred in my tests.

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