Database Recommendations - Status
I am creating an application where objects have a search status. To give some context, let's use the following example.
A help desk application where jobs are created and navigated through the following workflow:
New - Job created but unassigned In
Progress - Job assigned to the worker and in progress
Completed - Job ready for billing
Closed - Invoiced job
So, I create a status table with the following data:
and lookup column in jobs table
int StatusID -> view status
So, in the real world, let's say we have the following requirements.
- Users need to get a report to show all incomplete jobs (jobs that are either new or InProgress).
- Down the line, someone will want to add a new status, which is, for example, in the middle of completed and closed.
So my initial thoughts are to create a new column in the state table named SortOrder or similar and assign numbers to it like
New - 10 In
Progress - 20
Completed - 30
Closed - 40
This would mean that for case # 1 above, I could simply query the database for all jobs whose status is greater than or equal to 30. That would also be great for case # 2, because it means that if I enter a new status between completed and closed, it will not violate this report.
I can see this has cropped up a lot in different applications. Has anyone implemented such a solution or encountered this problem before?
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What we are doing is one state table and a table of associated state groups.
create table status_group ( id integer primary key not null, alias varchar(20) not null, descr varchar(128) ) create table status ( id integer primary key not null, status_group_id integer, alias varchar(20) not null, descr varchar(128) )
Then all statuses live in one place, but are grouped together with the presence of millions of separate ones.
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