Use upsert this way, the database itself will take care of the race condition. The challenge here is that we need to have the proper unique constraints in place. Use an exclusive lease on the backend so that second threads wait for the first one to finish. Not ideal but could work. Ed...
And then defined a specific one for unique constraints. /// <summary>/// Provides additional Postgres specific information about a/// <see cref="DbUpdateException"/> thrown by EF Core.This describes/// the case where the exception is a unique constraint violation./// </summary>/// <para...
When you do this, you don’t need to necessarily make your writes through a leader database — you could also imagine directly appending your writes to the log. (Going through a leader would still be useful if you want to validate that writes meet certain constraints before writing them ...
Hooks can be used for data integrity, but they will only enforce that integrity when you are modifying the database through model instances, and even then they are often subject to race conditions. It’s best to use database triggers and database constraints to enforce data integrity. ...
the application needs to know about the three constraints of aasn database tier: eventually, not immediately, consistent datastores. potential conflicts due to changes occurring in the same record in both copies. potential corruption of data due to one update coming in late after a conflicting ...
In some cases it is impossible or undesirable to create primary and foreign key constraints that are required for reference partitioning. For such cases, specifying parent-child relationships in a table family requires that all tables are explicitly equi-partitioned and each child table is created ...
and Spanish. We chose these languages to maximise the discovery of findings where amphibian species diversity is the highest43. We did not assess additional languages due to time constraints and excluded languages for which we found limited evidence during pilot searches. For instance, this included...
The DC Universe is composed of a number of different dimensional planes, most notably parallel earths (seeMultiverse), but the latter were eliminated when reality was altered by the Anti-Monitor (although stories featuring parallel earths have continued to crop up with various rationalizations in th...
10.2.0.2 4321610 IMPDP errors on constraints longer then 4000 bytes 10.2.0.2 4629844 Dump / wrong results from query with CHECK constraint 2.1.13 Corrupt/Bad Backup The following table lists the Corrupt/Bad Backup bugs addressed in this patch set: Fixed in Release Bug Number Description ...
Hooks can be used for data integrity, but they will only enforce that integrity when you are modifying the database through model instances, and even then they are often subject to race conditions. It’s best to use database triggers and database constraints to enforce data integrity. ...