Returns a tibble of `(tax_year, form, n_rows, url)` for every
published partition of a tier. Row counts are read from each
parquet's footer metadata (no full file scan), but one HTTP request
per partition is still issued, so this typically takes 10-60s
depending on tier.
Usage
nccs_core_coverage(tier = c("merged", "soi", "legacy"))
Arguments
- tier
One of `"merged"` (default), `"soi"`, or `"legacy"`.
Value
A tibble with columns `tax_year` (integer), `form`
(character), `n_rows` (double), and `url` (character HTTPS URL of
the parquet).
Details
Missing partitions (e.g. SOI-current `990pf` for 2017-2019) are
omitted from the result rather than reported as zero rows. The
canonical coverage tables are described in [nccs_core_url()].
See also
[nccs_core_url()], [nccs_read_core()].
Examples
if (FALSE) { # \dontrun{
# Coverage of the canonical merged tier
cov <- nccs_core_coverage("merged")
dplyr::summarise(cov, total = sum(n_rows), .by = form)
} # }
