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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# The following S3 methods are registered on load if dplyr is present
do_join <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE,
na_matches,
join_type) {
# TODO: handle `copy` arg: ignore?
# TODO: handle `suffix` arg: Arrow does prefix
# TODO: handle `keep` arg: "Should the join keys from both ‘x’ and ‘y’ be preserved in the output?"
# TODO: handle `na_matches` arg
x <- as_adq(x)
y <- as_adq(y)
by <- handle_join_by(by, x, y)
x$join <- list(
type = JoinType[[join_type]],
right_data = y,
by = by
)
collapse.arrow_dplyr_query(x)
}
left_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "LEFT_OUTER")
}
left_join.Dataset <- left_join.ArrowTabular <- left_join.arrow_dplyr_query
right_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "RIGHT_OUTER")
}
right_join.Dataset <- right_join.ArrowTabular <- right_join.arrow_dplyr_query
inner_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "INNER")
}
inner_join.Dataset <- inner_join.ArrowTabular <- inner_join.arrow_dplyr_query
full_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "FULL_OUTER")
}
full_join.Dataset <- full_join.ArrowTabular <- full_join.arrow_dplyr_query
semi_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "LEFT_SEMI")
}
semi_join.Dataset <- semi_join.ArrowTabular <- semi_join.arrow_dplyr_query
anti_join.arrow_dplyr_query <- function(x,
y,
by = NULL,
copy = FALSE,
suffix = c(".x", ".y"),
...,
keep = FALSE) {
do_join(x, y, by, copy, suffix, ..., keep = keep, join_type = "LEFT_ANTI")
}
anti_join.Dataset <- anti_join.ArrowTabular <- anti_join.arrow_dplyr_query
handle_join_by <- function(by, x, y) {
if (is.null(by)) {
return(set_names(intersect(names(x), names(y))))
}
stopifnot(is.character(by))
if (is.null(names(by))) {
by <- set_names(by)
}
# TODO: nicer messages?
stopifnot(
all(names(by) %in% names(x)),
all(by %in% names(y))
)
by
}
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