If you're a user of NHibernate, I hope you enjoy using polymorphic queries. It's one of the most powerful features of this ORM allowing you to write queries spanning against several hierarchies. Finally, you can even query for the derivations of object to get all the objects from db (don't try this at home:P). The … Continue reading Polymorphic count with NHibernate
Month: August 2011
DarkSwitch
Recently I found an article on my RSS InfoQ feed. I do understand that InfoQ presented a new information about some programming product, but it should be posted with a big exclamation "Do not use it for your app". It's nothing more than another 'create app with no programming skills' product. Take a look at … Continue reading DarkSwitch
Deiphobus, no more SELECT n + 1
The previous post contained an information about lazy loading of group of properties, let's call them families as it is called in the Cassandra. What about the following code. How many db hits you'd like to get by default? I'll tell you how many you'll get. The answer is two: first hit will occur, when … Continue reading Deiphobus, no more SELECT n + 1
Deiphobus, mapping properties groups to column families
As i it is stated in the official documentation, the column family can be compared to a table in the relational database and as with table, the main target of creating one is to hold the same type of objects together to create a better model, allow querying, etc. Speaking about Cassandra it has one … Continue reading Deiphobus, mapping properties groups to column families
