Perform arbitrary computation on remote backend
# S3 method for tbl_sql
do(.data, ..., .chunk_size = 10000L)
a tbl
Expressions to apply to each group. If named, results will be
stored in a new column. If unnamed, must return a data frame. You can
use .
to refer to the current group. You can not mix named and
unnamed arguments.
The size of each chunk to pull into R. If this number is too big, the process will be slow because R has to allocate and free a lot of memory. If it's too small, it will be slow, because of the overhead of talking to the database.