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main.go
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main.go
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// 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.
package main
import (
"fmt"
"os"
"github.com/apache/arrow/go/v16/parquet/file"
"github.com/apache/arrow/go/v16/parquet/schema"
"github.com/docopt/docopt-go"
)
const usage = `Parquet Schema Dumper.
Usage:
parquet_schema -h | --help
parquet_schema <file>
Options:
-h --help Show this screen.`
func main() {
args, _ := docopt.ParseDoc(usage)
rdr, err := file.OpenParquetFile(args["<file>"].(string), false)
if err != nil {
fmt.Fprintln(os.Stderr, "Error opening parquet file: ", err)
os.Exit(1)
}
schema.PrintSchema(rdr.MetaData().Schema.Root(), os.Stdout, 2)
}