RDBL

Kevin Feasel

2016-08-31

R

David Kun introduces the R Database Layer:

It is important to note that the SQL statements generated in the background are not executed unless explicitly requested by the command as.data.frame. Hence, you can merge, filter and aggregate your dataset on the database side and load only the result set into memory for R.

In general the design principle behind RDBL is to keep the models as close as possible to the usual data.frame logic, including (as shown later in detail) commands like aggregate, referencing columns by the \($\) operator and features like logical indexing using the \([]\) operator.

Check it out.  I’m not particularly excited about this for one simple reason:  SQL is a better data retrieval and connection DSL than an R-based mapper.  I get the value of sticking to one language as much as possible.  I also get that not all queries need to be well-optimized—for example, you might be running queries on a local machine or against a slice of data which is not connected to an operational production environment.  But I’m a big fan of using the right tool for the job, and the right tool for working with relational databases (and the “relational” part there is perhaps optional) is SQL.

Related Posts

Using The Map Function In R

Nicolas Attalides on using purrr: The best place to start when exploring the purrr package is the map function. The reader will notice that these functions are utilised in a very similar way to the apply family of functions. The subtle difference is that the purrr functions are consistent and the user can be assured of the output – as opposed to some […]

Read More

Tuning xgboost Models In R

Gabriel Vasconcelos has a new series on tuning xgboost models: My favourite Boosting package is the xgboost, which will be used in all examples below. Before going to the data let’s talk about some of the parameters I believe to be the most important. These parameters mostly are used to control how much the model […]

Read More

Categories

August 2016
MTWTFSS
« Jul Sep »
1234567
891011121314
15161718192021
22232425262728
293031