Note: does not treat map NaN or +-Infinity. This function is only for timings and demonstration, not for production use.
rqdatatable_prepare(
rqplan,
data_source,
...,
partition_column = NULL,
parallelCluster = NULL,
use_parallel = use_parallel,
extracols = NULL,
non_join_mapping = FALSE,
print_rquery = FALSE,
env = parent.frame()
)
an query plan produced by as_rquery_plan().
a data.frame.
force later arguments to bind by name.
character name of column to partition work by.
a cluster object, created by package parallel or by package snow. If NULL, use the registered default cluster.
logical, if TRUE use parallel cluster (when available).
extra columns to copy.
logical, if TRUE use non-join based column mapping.
logical, if TRUE print the rquery ops.
environment to work in.
treated data.