| # 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. |
| |
| compute_by <- function(by, data, ..., by_arg = "by", data_arg = "data", error_call = caller_env()) { |
| check_dots_empty0(...) |
| |
| by <- enquo(by) |
| check_by(by, data, by_arg = by_arg, data_arg = data_arg, error_call = error_call) |
| |
| if (is_grouped_adq(data)) { |
| names <- data$group_by_vars |
| from_by <- FALSE |
| } else { |
| names <- eval_select_by(by, data, error_call = error_call) |
| from_by <- TRUE |
| } |
| |
| new_by(from_by = from_by, names = names) |
| } |
| |
| is_grouped_adq <- function(data) { |
| !is_empty(data$group_by_vars) |
| } |
| |
| check_by <- function(by, |
| data, |
| ..., |
| by_arg = "by", |
| data_arg = "data", |
| error_call = caller_env()) { |
| check_dots_empty0(...) |
| |
| if (quo_is_null(by)) { |
| return(invisible(NULL)) |
| } |
| |
| if (is_grouped_adq(data)) { |
| message <- paste0( |
| "Can't supply `", by_arg, "` when `", |
| data_arg, "` is grouped data." |
| ) |
| abort(message) |
| } |
| |
| invisible(NULL) |
| } |
| |
| eval_select_by <- function(by, |
| data, |
| error_call = caller_env()) { |
| sim_df <- as.data.frame(implicit_schema(data)) |
| out <- eval_select( |
| expr = by, |
| data = sim_df, |
| allow_rename = FALSE, |
| error_call = error_call |
| ) |
| names(out) |
| } |
| |
| new_by <- function(from_by, names) { |
| structure(list(from_by = from_by, names = names), class = "arrow_dplyr_query_by") |
| } |