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Posted to github@arrow.apache.org by "kou (via GitHub)" <gi...@apache.org> on 2023/06/10 19:55:45 UTC
[GitHub] [arrow] kou commented on a diff in pull request #36022: GH-36008: [Ruby] [Parquet] Add Parquet::ArrowFileReader#each_row_group
kou commented on code in PR #36022:
URL: https://github.com/apache/arrow/pull/36022#discussion_r1225548093
##########
ruby/red-parquet/test/test-arrow-file-reader.rb:
##########
@@ -0,0 +1,56 @@
+# 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.
+
+class TestArrowFileReader < Test::Unit::TestCase
+ def setup
+ visible_field = Arrow::Field.new("visible", :boolean)
+ @schema = Arrow::Schema.new([visible_field])
+ visible_arrays = [Arrow::BooleanArray.new([true, false])]
+ visible_array = Arrow::ChunkedArray.new(visible_arrays)
+ table = Arrow::Table.new(@schema, [visible_array])
+ @file = Tempfile.open(["red-parquet", ".parquet"])
+ chunk_size = 1
+ writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
+ writer.write_table(table, chunk_size)
+ writer.close
Review Comment:
Could you use `Tempfile.create {...}` and `yield` in `setup` to remove a temporary file as soon as possible?
```suggestion
Tempfile.create(["red-parquet", ".parquet"]) do |file|
@file = file
chunk_size = 1
writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
writer.write_table(table, chunk_size)
writer.close
yield
end
```
##########
ruby/red-parquet/test/test-arrow-file-reader.rb:
##########
@@ -0,0 +1,56 @@
+# 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.
+
+class TestArrowFileReader < Test::Unit::TestCase
+ def setup
+ visible_field = Arrow::Field.new("visible", :boolean)
+ @schema = Arrow::Schema.new([visible_field])
+ visible_arrays = [Arrow::BooleanArray.new([true, false])]
+ visible_array = Arrow::ChunkedArray.new(visible_arrays)
+ table = Arrow::Table.new(@schema, [visible_array])
+ @file = Tempfile.open(["red-parquet", ".parquet"])
+ chunk_size = 1
+ writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
+ writer.write_table(table, chunk_size)
+ writer.close
+ end
+
+ sub_test_case("#each_row_group") do
+ test("without block") do
+ first_visible_arrays = [Arrow::BooleanArray.new([true])]
+ first_visible_array = Arrow::ChunkedArray.new(first_visible_arrays)
+ second_visible_arrays = [Arrow::BooleanArray.new([false])]
+ second_visible_array = Arrow::ChunkedArray.new(second_visible_arrays)
+
+ Arrow::FileInputStream.open(@file.path) do |input|
+ reader = Parquet::ArrowFileReader.new(input)
+ each_row_group = reader.each_row_group
+ assert_equal({
+ size: 2,
+ to_a: [
+ Arrow::Table.new(@schema, [first_visible_array]),
+ Arrow::Table.new(@schema, [second_visible_array])
Review Comment:
We can simplify this:
```suggestion
Arrow::FileInputStream.open(@file.path) do |input|
reader = Parquet::ArrowFileReader.new(input)
each_row_group = reader.each_row_group
assert_equal({
size: 2,
to_a: [
Arrow::Table.new(@schema, [[true]]),
Arrow::Table.new(@schema, [[false]])
```
##########
ruby/red-parquet/test/test-arrow-file-reader.rb:
##########
@@ -0,0 +1,56 @@
+# 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.
+
+class TestArrowFileReader < Test::Unit::TestCase
+ def setup
+ visible_field = Arrow::Field.new("visible", :boolean)
+ @schema = Arrow::Schema.new([visible_field])
Review Comment:
We can simplify this:
```suggestion
@schema = Arrow::Schema.new(visible: :boolean)
```
##########
ruby/red-parquet/test/test-arrow-file-reader.rb:
##########
@@ -0,0 +1,56 @@
+# 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.
+
+class TestArrowFileReader < Test::Unit::TestCase
+ def setup
+ visible_field = Arrow::Field.new("visible", :boolean)
+ @schema = Arrow::Schema.new([visible_field])
+ visible_arrays = [Arrow::BooleanArray.new([true, false])]
+ visible_array = Arrow::ChunkedArray.new(visible_arrays)
+ table = Arrow::Table.new(@schema, [visible_array])
Review Comment:
we can simplify this:
```suggestion
table = Arrow::Table.new(@schema, [[true], [false]])
```
##########
ruby/red-parquet/test/test-arrow-file-reader.rb:
##########
@@ -0,0 +1,56 @@
+# 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.
+
+class TestArrowFileReader < Test::Unit::TestCase
+ def setup
+ visible_field = Arrow::Field.new("visible", :boolean)
+ @schema = Arrow::Schema.new([visible_field])
+ visible_arrays = [Arrow::BooleanArray.new([true, false])]
+ visible_array = Arrow::ChunkedArray.new(visible_arrays)
+ table = Arrow::Table.new(@schema, [visible_array])
+ @file = Tempfile.open(["red-parquet", ".parquet"])
+ chunk_size = 1
+ writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
+ writer.write_table(table, chunk_size)
+ writer.close
Review Comment:
Could you use more Ruby-ish `ArrowFileWriter.open {...}` API?
```suggestion
Parquet::ArrowFileWriter.open(table.schema, @file.path) do |writer|
chunk_size = 1
writer.write_table(table, chunk_size)
end
```
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