/* * 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.hadoop.hive.ql.io.parquet.convert; import java.util.List; import org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe; import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category; import org.apache.hadoop.hive.serde2.typeinfo.ListTypeInfo; import org.apache.hadoop.hive.serde2.typeinfo.MapTypeInfo; import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo; import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory; import org.apache.parquet.schema.ConversionPatterns; import org.apache.parquet.schema.GroupType; import org.apache.parquet.schema.LogicalTypeAnnotation; import org.apache.parquet.schema.MessageType; import org.apache.parquet.schema.PrimitiveType; import org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName; import org.apache.parquet.schema.Type; import org.apache.parquet.schema.Type.Repetition; import org.apache.parquet.schema.Types; import static org.apache.parquet.schema.LogicalTypeAnnotation.listType; public class HiveSchemaConverter { public static MessageType convert(final List<String> columnNames, final List<TypeInfo> columnTypes) { final MessageType schema = new MessageType("hive_schema", convertTypes(columnNames, columnTypes)); return schema; } private static Type[] convertTypes(final List<String> columnNames, final List<TypeInfo> columnTypes) { if (columnNames.size() != columnTypes.size()) { throw new IllegalStateException("Mismatched Hive columns and types. Hive columns names" + " found : " + columnNames + " . And Hive types found : " + columnTypes); } final Type[] types = new Type[columnNames.size()]; for (int i = 0; i < columnNames.size(); ++i) { types[i] = convertType(columnNames.get(i), columnTypes.get(i)); } return types; } private static Type convertType(final String name, final TypeInfo typeInfo) { return convertType(name, typeInfo, Repetition.OPTIONAL); } private static Type convertType(final String name, final TypeInfo typeInfo, final Repetition repetition) { if (typeInfo.getCategory().equals(Category.PRIMITIVE)) { if (typeInfo.equals(TypeInfoFactory.stringTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.BINARY, name); } else if (typeInfo.equals(TypeInfoFactory.intTypeInfo) || typeInfo.equals(TypeInfoFactory.shortTypeInfo) || typeInfo.equals(TypeInfoFactory.byteTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.INT32, name); } else if (typeInfo.equals(TypeInfoFactory.longTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.INT64, name); } else if (typeInfo.equals(TypeInfoFactory.doubleTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.DOUBLE, name); } else if (typeInfo.equals(TypeInfoFactory.floatTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.FLOAT, name); } else if (typeInfo.equals(TypeInfoFactory.booleanTypeInfo)) { return new PrimitiveType(repetition, PrimitiveTypeName.BOOLEAN, name); } else if (typeInfo.equals(TypeInfoFactory.binaryTypeInfo)) { // TODO : binaryTypeInfo is a byte array. Need to map it throw new UnsupportedOperationException("Binary type not implemented"); } else if (typeInfo.equals(TypeInfoFactory.timestampTypeInfo)) { throw new UnsupportedOperationException("Timestamp type not implemented"); } else if (typeInfo.equals(TypeInfoFactory.voidTypeInfo)) { throw new UnsupportedOperationException("Void type not implemented"); } else if (typeInfo.equals(TypeInfoFactory.unknownTypeInfo)) { throw new UnsupportedOperationException("Unknown type not implemented"); } else { throw new IllegalArgumentException("Unknown type: " + typeInfo); } } else if (typeInfo.getCategory().equals(Category.LIST)) { return convertArrayType(name, (ListTypeInfo) typeInfo); } else if (typeInfo.getCategory().equals(Category.STRUCT)) { return convertStructType(name, (StructTypeInfo) typeInfo); } else if (typeInfo.getCategory().equals(Category.MAP)) { return convertMapType(name, (MapTypeInfo) typeInfo); } else if (typeInfo.getCategory().equals(Category.UNION)) { throw new UnsupportedOperationException("Union type not implemented"); } else { throw new IllegalArgumentException("Unknown type: " + typeInfo); } } // An optional group containing a repeated anonymous group "bag", containing // 1 anonymous element "array_element" private static GroupType convertArrayType(final String name, final ListTypeInfo typeInfo) { final TypeInfo subType = typeInfo.getListElementTypeInfo(); return listWrapper(name, listType(), new GroupType(Repetition.REPEATED, ParquetHiveSerDe.ARRAY.toString(), convertType("array_element", subType))); } // An optional group containing multiple elements private static GroupType convertStructType(final String name, final StructTypeInfo typeInfo) { final List<String> columnNames = typeInfo.getAllStructFieldNames(); final List<TypeInfo> columnTypes = typeInfo.getAllStructFieldTypeInfos(); return new GroupType(Repetition.OPTIONAL, name, convertTypes(columnNames, columnTypes)); } // An optional group containing a repeated anonymous group "map", containing // 2 elements: "key", "value" private static GroupType convertMapType(final String name, final MapTypeInfo typeInfo) { final Type keyType = convertType(ParquetHiveSerDe.MAP_KEY.toString(), typeInfo.getMapKeyTypeInfo(), Repetition.REQUIRED); final Type valueType = convertType(ParquetHiveSerDe.MAP_VALUE.toString(), typeInfo.getMapValueTypeInfo()); return ConversionPatterns.mapType(Repetition.OPTIONAL, name, keyType, valueType); } private static GroupType listWrapper(final String name, final LogicalTypeAnnotation logicalTypeAnnotation, final GroupType groupType) { return Types.optionalGroup().addField(groupType).as(logicalTypeAnnotation).named(name); } }