read_dv_diff | R Documentation |
Read a version of a versioned dataset into a data frame using just the stored diffs.
read_dv_diff(destination, as_of, key_cols)
destination |
a local directory path or an arrow SubTreeFileSystem |
as_of |
the valid date at which you'd like to read the dv |
key_cols |
a character vector of column names that constitute a unique key |
a data frame
temp_dir <- tempfile() dir.create(temp_dir, recursive = TRUE) df <- data.frame(a = 1:5, b = letters[1:5]) create_dv(df, temp_dir, diffed = TRUE) read_dv_diff(temp_dir, as_of = lubridate::now(), key_cols = get_metadata(temp_dir)$key_cols) unlink(temp_dir)
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