shard (version 0.1.0)

iterate_row_groups: Iterate row groups

Description

Iterate row groups

Usage

iterate_row_groups(x, decode = TRUE)

Value

A zero-argument iterator function that returns the next data.frame on each call, or NULL when exhausted.

Arguments

x

A shard_row_groups handle.

decode

Logical. If TRUE (default), native-encoded partitions are decoded to data.frames. If FALSE, native partitions are returned as their internal representation (advanced).

Examples

# \donttest{
s <- schema(x = float64())
sink <- table_sink(s, mode = "row_groups")
table_write(sink, 1L, data.frame(x = rnorm(5)))
rg <- table_finalize(sink)
it <- iterate_row_groups(rg)
chunk <- it()
# }