| #!/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 |