Avroparquetreader example

Overrides: getProtocol in class SpecificData I need read parquet data from aws s3. If I use aws sdk for this I can get inputstream like this: S3Object object = s3Client.getObject(new GetObjectRequest(bucketName, bucketKey)); InputStream inputStream = object.getObjectContent(); Read Write Parquet Files using Spark Problem: Using spark read and write Parquet Files , data schema available as Avro.(Solution: JavaSparkContext => SQLContext For example, the name field of our User schema is the primitive type string, whereas the favorite_number and favorite_color fields are both union s, represented by JSON arrays. union s are a complex type that can be any of the types listed in the array; e.g., favorite_number can either be an int or null , essentially making it an optional field. 2016-04-05 To write the java application is easy once you know how to do it. Instead of using the AvroParquetReader or the ParquetReader class that you find frequently when searching for a solution to read parquet files use the class ParquetFileReader instead. The basic setup is to read all row groups and then read all groups recursively. I was surprised because it should just load a GenericRecord view of the data.

generic . { GenericDatumReader, GenericDatumWriter, GenericRecord, GenericRecordBuilder } import org. apache. avro.

The following examples show how to use org.apache.parquet.avro.AvroParquetReader.These examples are extracted from open source projects.

Avro Parquet. The Avro Parquet connector provides an Akka Stream Source, Sink and Flow for push and pull data to and from parquet files. For more information about Apache Parquet please visit the official documentation.

As example to see the content of a Parquet file- $ hadoop jar /parquet-tools-1.10.0.jar cat /test/EmpRecord.parquet . Recommendations for learning.

control. object models, which are in-memory representations of data. avro, thrift, protocol buffers, hive and pig are all examples of object models. parquet does actually supply an example object model I used the data from Stack Overflow in order to see the interest on some of the products I follow (yes, HBase, Spark and others). The interest is calculated for each month on the last 5 years and is based on the number of posts and replies associated for a tag (ex: hdfs, elasticsearch and so on). Original example wrote 2 Avro dummy test data items to a Parquet file.
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Contribute to apache/parquet-mr development by creating an account on GitHub. Java Car.getClassSchema - 1 examples found. These are the top rated real world Java examples of Car.getClassSchema extracted from open source projects. You can rate examples to help us improve the quality of examples.

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I found this one AvroParquetReader accepts an InputFile instance. AvroParquetReader.

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The Ultimate Hands-On Hadoop object ParquetSample { def main(args: Array[String]) { val path = new Path("hdfs://hadoop-cluster/path-to-parquet-file") val reader = AvroParquetReader.builder[GenericRecord]().build(path) .asInstanceOf[ParquetReader[GenericRecord]] val iter = Iterator.continually(reader.read).takeWhile(_ != null) … 2018-02-07 AvroParquetReader< GenericRecord > reader = new AvroParquetReader< GenericRecord > (testConf, file); GenericRecord nextRecord = reader. read(); assertNotNull(nextRecord); assertEquals(map, … 2018-05-22 The builder for org.apache.parquet.avro.AvroParquetWriter accepts an OutputFile instance whereas the builder for org.apache.parquet.avro.AvroParquetReader accepts an InputFile instance. This example illustrates writing Avro format data to Parquet. Avro is a row or record oriented serialization protocol (i.e., not columnar-oriented). 2018-10-17 2016-11-19 Some sample code. val reader = AvroParquetReader.builder[GenericRecord](path).build().asInstanceOf[ParquetReader[GenericRecord]] // iter is of type Iterator[GenericRecord] val iter = Iterator.continually(reader.read).takeWhile(_ != null) // if you want a list then 2018-06-07 AVRO - Reference API - In the previous chapter, we described the input type of Avro, i.e., Avro schemas.