Will SQL Deadlocks cause a whole workflow to delete

Question

Here is the deadlock:
Unknown SQL Exception 1205 occurred. Additional error information from SQL Server is included below.  Transaction (Process ID 396) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
At the same time user was trying to start a workflow and it locks up on them. They log out of sharepoint go back in and attempt to restart the workflow.
Its gone. This is the only clue found so far to its disappearance.
My thinking is that a deadlock SQL process cannot remove a process that is coded in sharepoint, and it is more likely that something/someone else is deleting this workflow at the same time this user is attempting to run it.
What do you think?
Paul

Answer 1

Will these SQL statements drop entire workflows out of sharepoint:
WSS_SiteContent_CORPTAXWorkSpace_CSC_ASP9.dbo.proc_DropWorkflow
65
DELETE   FROM
dbo.ScheduledWorkItems
            WHERE
Type = CAST   (N'BDEADF09-C265-11d0-BCED-00A0C90AB50F' as uniqueidentifier) AND
ParentId = @ListId   AND
SiteId = @SiteId   AND
BatchId =   @WorkflowInstanceId     
WSS_SiteContent_CORPTAXWorkSpace_CSC_ASP9.dbo.proc_AutoDropWorkflows
44
EXEC   proc_DropWorkflow
@WorkflowInstanceId,  
@SiteId,
@WebId,
@ListId,
@RequestGuid   OUTPUT     
WSS_SiteContent_CORPTAXWorkSpace_CSC_ASP9.dbo.proc_DropWorkflowAssociation
42
EXEC @AllDeleted =   proc_AutoDropWorkflows
@SiteId,
NULL,
@ListId,
NULL,
@Id,
NULL,
1 ,
200,
@RequestGuid   OUTPUT     
Paul