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#!/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/file.arrow") do |input|
reader = Arrow::RecordBatchFileReader.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
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