giamo commented on a change in pull request #24405: [SPARK-27506][SQL] Allow deserialization of Avro data using compatible schemas URL: https://github.com/apache/spark/pull/24405#discussion_r314223378
########## File path: external/avro/src/main/scala/org/apache/spark/sql/avro/AvroDataToCatalyst.scala ########## @@ -53,7 +54,9 @@ case class AvroDataToCatalyst( @transient private lazy val avroSchema = new Schema.Parser().parse(jsonFormatSchema) - @transient private lazy val reader = new GenericDatumReader[Any](avroSchema) Review comment: Exactly, to read data you can use a compatible evolved schema, but you also need to pass the schema with which the data was originally serialized. Using this GenericDatumReader API https://avro.apache.org/docs/1.8.2/api/java/org/apache/avro/generic/GenericDatumReader.html#GenericDatumReader(org.apache.avro.Schema,%20org.apache.avro.Schema) ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
