The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.
The dbProject package provides connection management for
local DuckDB databases. It uses pins for persistent storage
and enables automatic reconnection.
# Create project in temp directory
project_dir <- tempfile("dbproject_demo")
db_path <- file.path(project_dir, "demo.duckdb")
proj <- dbProject$new(path = project_dir, dbdir = db_path)
#> Creating new version '20260602T145216Z-98e42'
#> Writing to pin 'cachedConnection'
#> Manifest file written to root folder of board, as `_pins.yaml`
proj
#> ─────────────────────────────────── dbProject ──────────────────────────────────
#> ✔ Connected
#> ── Board Content ───────────────────────────────────────────────────────────────
#> Board Path: '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea'
#> # A tibble: 1 × 6
#> name type title created file_size meta
#> <chr> <chr> <chr> <dttm> <fs::byt> <list>
#> 1 cachedConnection rds connConnectio… 2026-06-02 10:52:16 257 <pins_met>
#> ── Database Content ────────────────────────────────────────────────────────────
#> Database Path:
#> '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea/demo.duckdb'# Get the connection and add data
con <- proj$get_conn()
mtcars_tbl <- dplyr::copy_to(con, mtcars, "mtcars", temporary = FALSE, overwrite = TRUE)
mtcars_tbl
#> # Source: table<mtcars> [?? x 11]
#> # Database: DuckDB 1.5.2 [unknown@Linux 4.18.0-553.126.1.el8_10.x86_64:R 4.5.2//scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea/demo.duckdb]
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4
#> 2 21 6 160 110 3.9 2.88 17.0 0 1 4 4
#> 3 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1
#> 4 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1
#> 5 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2
#> 6 18.1 6 225 105 2.76 3.46 20.2 1 0 3 1
#> 7 14.3 8 360 245 3.21 3.57 15.8 0 0 3 4
#> 8 24.4 4 147. 62 3.69 3.19 20 1 0 4 2
#> 9 22.8 4 141. 95 3.92 3.15 22.9 1 0 4 2
#> 10 19.2 6 168. 123 3.92 3.44 18.3 1 0 4 4
#> # ℹ more rowsproj$pin_write(x = mtcars_tbl, name = "mtcars")
#> Creating new version '20260602T145218Z-f87e6'
#> Writing to pin 'mtcars'
#> Manifest file written to root folder of board, as `_pins.yaml`
proj
#> ─────────────────────────────────── dbProject ──────────────────────────────────
#> ✔ Connected
#> ── Board Content ───────────────────────────────────────────────────────────────
#> Board Path: '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea'
#> # A tibble: 2 × 6
#> name type title created file_size meta
#> <chr> <chr> <chr> <dttm> <fs::byt> <list>
#> 1 cachedConnection rds connConnectio… 2026-06-02 10:52:16 257 <pins_met>
#> 2 mtcars rds mtcars: a pin… 2026-06-02 10:52:18 285 <pins_met>
#> ── Database Content ────────────────────────────────────────────────────────────
#> Database Path:
#> '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea/demo.duckdb'
#> ℹ Tables:
#> • mtcars# Disconnect
proj$disconnect()
proj
#> ─────────────────────────────────── dbProject ──────────────────────────────────
#> ✖ Disconnected
#> ── Board Content ───────────────────────────────────────────────────────────────
#> Board Path: '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea'
#> # A tibble: 2 × 6
#> name type title created file_size meta
#> <chr> <chr> <chr> <dttm> <fs::byt> <list>
#> 1 cachedConnection rds connConnectio… 2026-06-02 10:52:16 257 <pins_met>
#> 2 mtcars rds mtcars: a pin… 2026-06-02 10:52:18 285 <pins_met>
#> ── Database Content ────────────────────────────────────────────────────────────
#> ℹ No active connection.
# Reconnect
proj$reconnect()
proj
#> ─────────────────────────────────── dbProject ──────────────────────────────────
#> ✔ Connected
#> ── Board Content ───────────────────────────────────────────────────────────────
#> Board Path: '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea'
#> # A tibble: 2 × 6
#> name type title created file_size meta
#> <chr> <chr> <chr> <dttm> <fs::byt> <list>
#> 1 cachedConnection rds connConnectio… 2026-06-02 10:52:16 257 <pins_met>
#> 2 mtcars rds mtcars: a pin… 2026-06-02 10:52:18 285 <pins_met>
#> ── Database Content ────────────────────────────────────────────────────────────
#> Database Path:
#> '/scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea/demo.duckdb'
#> ℹ Tables:
#> • mtcarsrestored <- proj$pin_read("mtcars")
head(restored, 5)
#> # Source: SQL [?? x 11]
#> # Database: DuckDB 1.5.2 [unknown@Linux 4.18.0-553.126.1.el8_10.x86_64:R 4.5.2//scratch/5919152.1.linga/RtmpMwIBEx/dbproject_demo2a85547df2ea/demo.duckdb]
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4
#> 2 21 6 160 110 3.9 2.88 17.0 0 1 4 4
#> 3 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1
#> 4 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1
#> 5 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.