Github user mn-mikke commented on a diff in the pull request: https://github.com/apache/spark/pull/21774#discussion_r203422909 --- Diff: external/avro/src/main/scala/org/apache/spark/sql/avro/CatalystDataToAvro.scala --- @@ -0,0 +1,62 @@ +/* + * 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 org.apache.spark.sql + +import java.io.ByteArrayOutputStream + +import org.apache.avro.generic.GenericDatumWriter +import org.apache.avro.io.{BinaryEncoder, EncoderFactory} + +import org.apache.spark.sql.avro.{AvroSerializer, SchemaConverters} +import org.apache.spark.sql.catalyst.expressions.{Expression, UnaryExpression} +import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback +import org.apache.spark.sql.types.{BinaryType, DataType} + --- End diff -- ```ExpressionDescription``` and javadoc?
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