Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p><em>Note: the following advice holds for all O/RM tools that implement the unit of work pattern such as Entity Framework's <code>ObjectContext</code>, <code>DbContext</code>, NHibernate's <code>Session</code>, and LINQ to SQL's <code>DataContext</code>.</em></p> <p>The LINQ to SQL DataContext is NOT thread-safe. You should create (at least) 1 context per web request. Reusing the same instance over multiple threads means that one thread can call <code>SubmitChanges</code> while another thread is still inserting new objects. If you're lucky the <code>DataContext</code> will throw an exception, because it cannot persist the changes. If you're unlucky, the <code>DataContext</code> succeeds and you break the atomicy of a single request, which can cause you to have inconsistent data in your database. In other words: You'll have a database full of shit!</p> <p>Besides that, the <code>DataContext</code> keeps all objects in its cache, which mean that the memory consumption of your application will keep growing, which can lead to an <code>OutOfMemoryException</code> (OOM). And even if you won’t get an OOM, the objects in the cache get stale and especially if other applications or processes are updating your database, you will never see those changes when an entity is already in memory. And last thing to note is that there is no way for you to rollback changes made in the <code>DataContext</code> so when you (at one point) invalidated the <code>DataContext</code> (because of errors) there is no way to restore this (except from creating a totally new <code>DataContext</code>). In that case your AppDomain is doomed.</p>
    singulars
    1. This table or related slice is empty.
    1. POIs maintain the transaction with a static LINQ to SQL DataContext in asp.net possible?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USSteven
    1. USSteven
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POIs maintain the transaction with a static LINQ to SQL DataContext in asp.net possible?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COSuper Like: "You'll have a database full of shit!" :)
      singulars
      1. PO
      1. USthis. __curious_geek
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload