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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.
library(dplyr, warn.conflicts = FALSE)
skip_if_not_available("acero")
test_that("ExecPlanReader does not start evaluating a query", {
skip_if_not(CanRunWithCapturedR())
rbr <- as_record_batch_reader(
function(x) stop("This query will error if started"),
schema = schema(a = int32())
)
reader <- as_record_batch_reader(as_adq(rbr))
expect_identical(reader$PlanStatus(), "PLAN_NOT_STARTED")
expect_error(reader$read_table(), "This query will error if started")
expect_identical(reader$PlanStatus(), "PLAN_FINISHED")
})
test_that("ExecPlanReader evaluates nested exec plans lazily", {
reader <- as_record_batch_reader(as_adq(arrow_table(a = 1:10)))
expect_identical(reader$PlanStatus(), "PLAN_NOT_STARTED")
head_reader <- head(reader, 4)
expect_identical(reader$PlanStatus(), "PLAN_NOT_STARTED")
expect_equal(
head_reader$read_table(),
arrow_table(a = 1:4)
)
expect_identical(reader$PlanStatus(), "PLAN_FINISHED")
})
test_that("ExecPlanReader evaluates head() lazily", {
reader <- as_record_batch_reader(as_adq(arrow_table(a = 1:10)))
expect_identical(reader$PlanStatus(), "PLAN_NOT_STARTED")
head_reader <- head(reader, 4)
expect_identical(reader$PlanStatus(), "PLAN_NOT_STARTED")
expect_equal(
head_reader$read_table(),
arrow_table(a = 1:4)
)
expect_identical(reader$PlanStatus(), "PLAN_FINISHED")
})
test_that("ExecPlanReader evaluates head() lazily", {
# Make a rather long RecordBatchReader
reader <- RecordBatchReader$create(
batches = rep(
list(record_batch(line = letters)),
100L
)
)
# ...But only get 10 rows from it
query <- head(as_adq(reader), 10)
expect_identical(as_arrow_table(query)$num_rows, 10L)
# Depending on exactly how quickly background threads respond to the
# request to cancel, reader$read_table()$num_rows > 0 may or may not
# evaluate to TRUE (i.e., the reader may or may not be completely drained).
})
test_that("head() of an ExecPlanReader is an ExecPlanReader", {
reader <- as_record_batch_reader(as_adq(arrow_table(x = 1:10)))
expect_r6_class(reader, "ExecPlanReader")
reader_head <- head(reader, 6)
expect_r6_class(reader_head, "ExecPlanReader")
expect_equal(
as_arrow_table(reader_head),
arrow_table(x = 1:6)
)
})
test_that("do_exec_plan_substrait can evaluate a simple plan", {
skip_if_not_available("substrait")
df <- data.frame(i = 1:5, b = rep_len(c(TRUE, FALSE), 5))
table <- arrow_table(df, schema = schema(i = int64(), b = bool()))
tf <- tempfile()
on.exit(unlink(tf))
write_parquet(table, tf)
substrait_json <- sprintf(
'{
"relations": [
{"rel": {
"read": {
"base_schema": {
"struct": {
"types": [ {"i64": {}}, {"bool": {}} ]
},
"names": ["i", "b"]
},
"local_files": {
"items": [
{
"uri_file": "file://%s",
"parquet": {}
}
]
}
}
}}
]
}',
tf
)
substrait_buffer <- substrait__internal__SubstraitFromJSON(substrait_json)
expect_r6_class(substrait_buffer, "Buffer")
substrait_raw <- as.raw(substrait_buffer)
substrait_json_roundtrip <- substrait__internal__SubstraitToJSON(substrait_buffer)
expect_match(substrait_json_roundtrip, tf, fixed = TRUE)
result <- do_exec_plan_substrait(substrait_json)
expect_identical(
# TODO(ARROW-15585) The "select(i, b)" should not be needed
tibble::as_tibble(result) |> select(i, b),
tibble::as_tibble(df)
)
})
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