The goal of demoadbcplyr is to be a proof-of-concept for the hardest possible use of dbplyr generating SQL to send to an ADBC driver. This example uses the ADBC FlightSQL driver, which itself wraps a connection to DuckDB. The proof-of-concept here uses dbplyr with a DBI connection that is pretending to be Postgres for just long enough to generate Postgres-flavoured SQL.
You can install the development version of demoadbcplyr from GitHub with:
# install.packages("pak")
pak::pak("paleolimbot/demoadbcplyr")This is a basic example which shows you how to solve a common problem:
# Start the FlightSQL test server with `docker compose up`
library(demoadbcplyr)
library(dplyr, warn.conflicts = FALSE)
Sys.setenv(R_WRAPPER_FLIGHTSQL_TEST_URI = "grpc+tls://localhost:31337")
con <- wrapper_test_con()
tbl(con, "NATION") |>
arrange(n_nationkey)
#> # Source: SQL [?? x 4]
#> # Database: WrapperConnection
#> # Ordered by: n_nationkey
#> n_nationkey n_name n_regionkey n_comment
#> <int> <chr> <int> <chr>
#> 1 0 ALGERIA 0 "furiously regular requests. platelets aff…
#> 2 1 ARGENTINA 1 "instructions wake quickly. final deposits…
#> 3 2 BRAZIL 1 "asymptotes use fluffily quickly bold inst…
#> 4 3 CANADA 1 "ss deposits wake across the pending foxes…
#> 5 4 EGYPT 4 "usly ironic, pending foxes. even, special…
#> 6 5 ETHIOPIA 0 "regular requests sleep carefull"
#> 7 6 FRANCE 3 "oggedly. regular packages solve across"
#> 8 7 GERMANY 3 "ong the regular requests: blithely silent…
#> 9 8 INDIA 2 "uriously unusual deposits about the slyly…
#> 10 9 INDONESIA 2 "d deposits sleep quickly according to the…
#> # ℹ more rows