cratedb

Connecting R and CrateDB with ADBC

Instructions

Tip

If you already have a CrateDB instance running, skip the steps to set up and clean up CrateDB.

Prerequisites

1. Install R

2. Install dbc

3. Install R packages adbcdrivermanager, arrow, and tibble:

   install.packages(c("adbcdrivermanager", "arrow", "tibble"))

Set up CrateDB

1. Install Docker

2. Start a CrateDB instance:

   docker run -d --rm --name cratedb -p 4200:4200 -p 5432:5432 crate -Cdiscovery.type=single-node

Connect to CrateDB

1. Install the PostgreSQL ADBC driver:

   dbc install postgresql

2. Customize the R script main.R as needed

   • Change the connection arguments in adbc_database_init()
     • Format uri according to the connection URI format used by PostgreSQL, or keep it as is
   • If you changed which database you're connecting to, also change the SQL SELECT statement in read_adbc()

3. Run the R script:

   Rscript main.R

Clean up

Stop the Docker container running CrateDB:

docker stop cratedb