Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/src/arrow/ruby/red-arrow/example/write-file.rb b/src/arrow/ruby/red-arrow/example/write-file.rb
new file mode 100755
index 000000000..c55ab2ef2
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/example/write-file.rb
@@ -0,0 +1,63 @@
+#!/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"
+
+fields = [
+  Arrow::Field.new("uint8",  :uint8),
+  Arrow::Field.new("uint16", :uint16),
+  Arrow::Field.new("uint32", :uint32),
+  Arrow::Field.new("uint64", :uint64),
+  Arrow::Field.new("int8",   :int8),
+  Arrow::Field.new("int16",  :int16),
+  Arrow::Field.new("int32",  :int32),
+  Arrow::Field.new("int64",  :int64),
+  Arrow::Field.new("float",  :float),
+  Arrow::Field.new("double", :double),
+]
+schema = Arrow::Schema.new(fields)
+
+Arrow::FileOutputStream.open("/tmp/file.arrow", false) do |output|
+  Arrow::RecordBatchFileWriter.open(output, schema) do |writer|
+    uints = [1, 2, 4, 8]
+    ints = [1, -2, 4, -8]
+    floats = [1.1, -2.2, 4.4, -8.8]
+    columns = [
+      Arrow::UInt8Array.new(uints),
+      Arrow::UInt16Array.new(uints),
+      Arrow::UInt32Array.new(uints),
+      Arrow::UInt64Array.new(uints),
+      Arrow::Int8Array.new(ints),
+      Arrow::Int16Array.new(ints),
+      Arrow::Int32Array.new(ints),
+      Arrow::Int64Array.new(ints),
+      Arrow::FloatArray.new(floats),
+      Arrow::DoubleArray.new(floats),
+    ]
+
+    record_batch = Arrow::RecordBatch.new(schema, 4, columns)
+    writer.write_record_batch(record_batch)
+
+    sliced_columns = columns.collect do |column|
+      column.slice(1, 3)
+    end
+    record_batch = Arrow::RecordBatch.new(schema, 3, sliced_columns)
+    writer.write_record_batch(record_batch)
+  end
+end