Feature request: Routines to get meta data of the data frame without opening the whole data about fst HOT 3 CLOSED

Hi @wei-wu-nyc , thanks for your request. The latest CRAN release of the fst package actually has a method fst.metadata which shows some basic information about a fst file in tibble-style (such as names and types). Future releases will show more information, for example the key columns and dimensions of the stored table. Hope this helps!

from fst.

Thanks @MarcusKlik, this actually is enough for my current need. Did not see the fst.metadata call.

from fst.

Using method fst.metadata from the develop branch of fst:

x = data.table(X = 1:10, B = LETTERS[1:10], key = "X")
write.fst(x, "1.fst")
fst.metadata("1.fst")

will now give you output like:

<fst file>
10 rows, 2 columns (1.fst)

* 'X': integer (key 1)
* 'B': character

from fst.