'Internal connection fatal error' when calling `sys.*` queries.

[Nicholas Preston]

'Internal connection fatal error' when calling sys.* queries.

When trying to run QueryAsync or any repo stored procedure, I get an exception that says:

System.InvalidOperationException: Internal connection fatal error.
   at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__126_0(Task`1 result)
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location ---
   at Insight.Database.DBConnectionExtensions.GetReaderAsync(IDbCommand command, CommandBehavior commandBehavior, CancellationToken cancellationToken)
   at Insight.Database.DBConnectionExtensions.ExecuteAsyncAndAutoClose[T](IDbConnection connection, Object parameters, Func`2 getCommand, Boolean callGetReader, Func`3 translate, Comma
ndBehavior commandBehavior, CancellationToken cancellationToken, Object outputParameters)
   at vespin_insights.Pages.Sandbox.IndexModel.OnGetSprocs()
   at vespin_insights.Pages.Sandbox.IndexModel.OnGetSprocs()

Steps to reproduce

 string sproc_search_query = """
    --- This originally searched stored procedures, but I'm shortening this to show that it's `sys.objects` with an issue
          SELECT
         *
      FROM
          sys.objects
  """;

  var procs_found = await connection.QuerySqlAsync<SprocMetadata>(sproc_search_query);
  procs_found.Dump("found");

Expected behavior

The standard sys.object columns and row to be returned.

This also happens with sys.parameters, sys.comments, sql_expression_dependencies and perhaps a few others. Even stuffing this code in a stored procedure doesn't solve the issue.

On the other hand, sys.sql_modules works just fine! Can't imagine why only a couple of sys.* work while most do not.

• Dotnet version: [net7]
• Database: [SQL Server]
• Library version: [6.3.11]

[Nicholas Preston]

Ok, so.... running

    SELECT name as procedure_name FROM sys.objects

Instead of

SELECT * FROM sys.objects

makes it work.

Why? Idk. But I'm using it for now.

Thanks for reading.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Jon Wagner]

I added this test case for .net8/Microsoft.Data.SqlClient. Seems to be working:

		[Test]
		public void TestSysProcs()
		{
			// Issue #498
			var results = Connection().QuerySql<SprocMetadata>("SELECT * FROM sys.objects");
			ClassicAssert.Greater(results.Count, 0);
		}

Please reopen if v8 doesn't fix it.