Check if a hash index exists for a .vtr column

Check if a hash index exists for a .vtr column

Usage

has_index(path, column)

Arguments

path

Path to a .vtr file.

column

Character vector. Name(s) of column(s).

Value

Logical scalar: TRUE if a .vtri index file exists.

Examples

f <- tempfile(fileext = ".vtr")
write_vtr(data.frame(id = letters, val = 1:26, stringsAsFactors = FALSE), f)
has_index(f, "id")   # FALSE
create_index(f, "id")
has_index(f, "id")   # TRUE
unlink(c(f, paste0(f, ".id.vtri")))