inst/doc/fallback.R

In duckplyr: A 'DuckDB'-Backed Version of 'dplyr'

## ----include = FALSE----------------------------------------------------------
clean_output <- function(x, options) {
  x <- gsub("0x[0-9a-f]+", "0xdeadbeef", x)
  x <- gsub("dataframe_[0-9]*_[0-9]*", "      dataframe_42_42      ", x)
  x <- gsub("[0-9]*\\.___row_number ASC", "42.___row_number ASC", x)
  x <- gsub("─", "-", x)
  x
}

local({
  hook_source <- knitr::knit_hooks$get("document")
  knitr::knit_hooks$set(document = clean_output)
})

knitr::opts_chunk$set(
  collapse = TRUE,
  eval = identical(Sys.getenv("IN_PKGDOWN"), "true") || (getRversion() >= "4.1" && rlang::is_installed(c("conflicted", "dbplyr", "nycflights13"))),
  comment = "#>"
)

options(conflicts.policy = list(warn = FALSE))

Sys.setenv(DUCKPLYR_FALLBACK_COLLECT = 0)

## ----attach-------------------------------------------------------------------
# library(conflicted)
# library(dplyr)
# conflict_prefer("filter", "dplyr")

## -----------------------------------------------------------------------------
# duckdb <-
#   duckplyr::duckdb_tibble(a = 1:3) |>
#   arrange(desc(a)) |>
#   mutate(b = a + 1) |>
#   select(-a)

## -----------------------------------------------------------------------------
# duckdb |>
#   explain()

## -----------------------------------------------------------------------------
# duckplyr::last_rel()

## -----------------------------------------------------------------------------
# duckdb |> collect()
# duckplyr::last_rel()

## -----------------------------------------------------------------------------
# verbose_plus_one <- function(x) {
#   message("Adding one to ", paste(x, collapse = ", "))
#   x + 1
# }
# 
# fallback <-
#   duckplyr::duckdb_tibble(a = 1:3) |>
#   arrange(desc(a)) |>
#   mutate(b = verbose_plus_one(a)) |>
#   select(-a)

## -----------------------------------------------------------------------------
# duckplyr::last_rel()

## -----------------------------------------------------------------------------
# fallback |>
#   explain()

## -----------------------------------------------------------------------------
# fallback |> collect()
# 
# duckplyr::last_rel()