diff options
Diffstat (limited to 'src/arrow/ruby/red-arrow/example/read-stream.rb')
-rwxr-xr-x | src/arrow/ruby/red-arrow/example/read-stream.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/example/read-stream.rb b/src/arrow/ruby/red-arrow/example/read-stream.rb new file mode 100755 index 000000000..c7197120c --- /dev/null +++ b/src/arrow/ruby/red-arrow/example/read-stream.rb @@ -0,0 +1,36 @@ +#!/usr/bin/env ruby +# +# 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. + +require "arrow" + +Arrow::MemoryMappedInputStream.open("/tmp/stream.arrow") do |input| + reader = Arrow::RecordBatchStreamReader.new(input) + fields = reader.schema.fields + reader.each_with_index do |record_batch, i| + puts("=" * 40) + puts("record-batch[#{i}]:") + fields.each do |field| + field_name = field.name + values = record_batch.collect do |record| + record[field_name] + end + puts(" #{field_name}: #{values.inspect}") + end + end +end |