read_dv: Read dv

In dataversionr: Time Versioned Storage of Data Frames

Read dv

Description

Read a version of a versioned dataset into a data frame

Usage

read_dv(destination, as_of = NA, source = "latest")

Arguments

destination	a local directory path or an arrow SubTreeFileSystem
as_of	the valid date at which you'd like to read the dv
source	the source of the dv. Options are 'latest', 'diffs' or 'backup'

Value

a data frame

Examples

temp_dir <- tempfile()
dir.create(temp_dir, recursive = TRUE)
df <- data.frame(a = 1:5, b = letters[1:5])
create_dv(df, temp_dir, backup_count = 5L)

read_dv(temp_dir)

read_dv(temp_dir, source = "backup")

read_dv(temp_dir, as_of = lubridate::now(), source = "diffs")

unlink(temp_dir)

dataversionr documentation built on Aug. 18, 2022, 9:06 a.m.