rdblue commented on a change in pull request #1612: URL: https://github.com/apache/iceberg/pull/1612#discussion_r530707498
########## File path: mr/src/main/java/org/apache/iceberg/mr/hive/HiveSchemaConverter.java ########## @@ -0,0 +1,118 @@ +/* + * 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.iceberg.mr.hive; + +import java.util.ArrayList; +import java.util.List; +import org.apache.hadoop.hive.serde2.typeinfo.DecimalTypeInfo; +import org.apache.hadoop.hive.serde2.typeinfo.ListTypeInfo; +import org.apache.hadoop.hive.serde2.typeinfo.MapTypeInfo; +import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo; +import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo; +import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; +import org.apache.iceberg.Schema; +import org.apache.iceberg.types.Type; +import org.apache.iceberg.types.Types; + +class HiveSchemaConverter { + private int id; + + private HiveSchemaConverter() { + id = 0; + } + + static Schema convert(List<String> names, List<TypeInfo> typeInfos) { + HiveSchemaConverter converter = new HiveSchemaConverter(); + return new Schema(converter.convertInternal(names, typeInfos)); + } + + List<Types.NestedField> convertInternal(List<String> names, List<TypeInfo> typeInfos) { + List<Types.NestedField> result = new ArrayList<>(names.size()); + for (int i = 0; i < names.size(); ++i) { + result.add(Types.NestedField.optional(id++, names.get(i), convert(typeInfos.get(i)))); + } + + return result; + } + + Type convert(TypeInfo typeInfo) { + switch (typeInfo.getCategory()) { + case PRIMITIVE: + switch (((PrimitiveTypeInfo) typeInfo).getPrimitiveCategory()) { + case FLOAT: + return Types.FloatType.get(); + case DOUBLE: + return Types.DoubleType.get(); + case BOOLEAN: + return Types.BooleanType.get(); + case BYTE: + case SHORT: + throw new IllegalArgumentException("Unsupported Hive type (" + + ((PrimitiveTypeInfo) typeInfo).getPrimitiveCategory() + + ") for Iceberg tables. Consider using INT/INTEGER type instead."); + case INT: + return Types.IntegerType.get(); + case LONG: + return Types.LongType.get(); + case BINARY: + return Types.BinaryType.get(); + case CHAR: + case VARCHAR: + throw new IllegalArgumentException("Unsupported Hive type (" + + ((PrimitiveTypeInfo) typeInfo).getPrimitiveCategory() + + ") for Iceberg tables. Consider using STRING type instead."); Review comment: I would be fine mapping these to string. ---------------------------------------------------------------- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
