zhangjun0x01 commented on a change in pull request #2217: URL: https://github.com/apache/iceberg/pull/2217#discussion_r578961818
########## File path: flink/src/main/java/org/apache/iceberg/flink/actions/MigrateAction.java ########## @@ -0,0 +1,423 @@ +/* + * 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.flink.actions; + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.util.Arrays; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import org.apache.flink.api.common.functions.RichFlatMapFunction; +import org.apache.flink.configuration.GlobalConfiguration; +import org.apache.flink.runtime.util.HadoopUtils; +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.table.catalog.CatalogPartitionSpec; +import org.apache.flink.table.catalog.ObjectPath; +import org.apache.flink.table.catalog.exceptions.TableNotExistException; +import org.apache.flink.table.catalog.hive.HiveCatalog; +import org.apache.flink.util.ArrayUtils; +import org.apache.flink.util.Collector; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.FileStatus; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.fs.PathFilter; +import org.apache.hadoop.hive.metastore.api.FieldSchema; +import org.apache.hadoop.hive.metastore.api.Partition; +import org.apache.iceberg.AppendFiles; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DataFiles; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.ManifestFile; +import org.apache.iceberg.ManifestFiles; +import org.apache.iceberg.ManifestWriter; +import org.apache.iceberg.Metrics; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.PartitionField; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.actions.Action; +import org.apache.iceberg.catalog.Catalog; +import org.apache.iceberg.catalog.Namespace; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.flink.FlinkCatalogFactory; +import org.apache.iceberg.hadoop.HadoopCatalog; +import org.apache.iceberg.hadoop.HadoopFileIO; +import org.apache.iceberg.hadoop.HadoopInputFile; +import org.apache.iceberg.hive.HiveSchemaUtil; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.io.OutputFile; +import org.apache.iceberg.mapping.NameMapping; +import org.apache.iceberg.mapping.NameMappingParser; +import org.apache.iceberg.orc.OrcMetrics; +import org.apache.iceberg.parquet.ParquetUtil; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.Tasks; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class MigrateAction implements Action<List<ManifestFile>> { + private static final Logger LOGGER = LoggerFactory.getLogger(MigrateAction.class); + + private static final String PATQUET_INPUT_FORMAT = "org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat"; + private static final String ORC_INPUT_FORMAT = "org.apache.hadoop.hive.ql.io.orc.OrcInputFormat"; + private static final PathFilter HIDDEN_PATH_FILTER = + p -> !p.getName().startsWith("_") && !p.getName().startsWith("."); + private static final String ICEBERG_METADATA_FOLDER = "metadata"; + + private final StreamExecutionEnvironment env; + private final HiveCatalog flinkHiveCatalog; // the HiveCatalog of flink + private final String hiveSourceDatabaseName; + private final String hiveSourceTableName; + private final Catalog icebergCatalog; + private final Namespace baseNamespace; + private final String icebergDatabaseName; + private final String icebergTableName; + private int maxParallelism; + + public MigrateAction(StreamExecutionEnvironment env, HiveCatalog flinkHiveCatalog, String hiveSourceDatabaseName, + String hiveSourceTableName, Catalog icebergCatalog, Namespace baseNamespace, + String icebergDatabaseName, + String icebergTableName) { + this.env = env; + this.flinkHiveCatalog = flinkHiveCatalog; + this.hiveSourceDatabaseName = hiveSourceDatabaseName; + this.hiveSourceTableName = hiveSourceTableName; + this.icebergCatalog = icebergCatalog; + this.baseNamespace = baseNamespace; + this.icebergDatabaseName = icebergDatabaseName; + this.icebergTableName = icebergTableName; + this.maxParallelism = env.getParallelism(); + } + + @Override + public List<ManifestFile> execute() { + flinkHiveCatalog.open(); + // hive source table + ObjectPath tableSource = new ObjectPath(hiveSourceDatabaseName, hiveSourceTableName); + org.apache.hadoop.hive.metastore.api.Table hiveTable; + try { + hiveTable = flinkHiveCatalog.getHiveTable(tableSource); + } catch (TableNotExistException e) { + throw new RuntimeException(String.format("The source table %s not exists ! ", hiveSourceTableName)); + } + + List<FieldSchema> fieldSchemaList = hiveTable.getSd().getCols(); + List<FieldSchema> partitionList = hiveTable.getPartitionKeys(); + fieldSchemaList.addAll(partitionList); + Schema icebergSchema = HiveSchemaUtil.convert(fieldSchemaList); + PartitionSpec spec = toPartitionSpec(partitionList, icebergSchema); + + FileFormat fileFormat = getHiveFileFormat(hiveTable); + + TableIdentifier identifier = TableIdentifier.of(toNamespace(), icebergTableName); + String hiveLocation = hiveTable.getSd().getLocation(); + + Map<String, String> properties = Maps.newHashMap(); + properties.put(TableProperties.DEFAULT_FILE_FORMAT, fileFormat.name()); + if (!baseNamespace.isEmpty()) { + properties.put(FlinkCatalogFactory.BASE_NAMESPACE, baseNamespace.toString()); + } + + Table icebergTable; + if (icebergCatalog instanceof HadoopCatalog) { + icebergTable = icebergCatalog.createTable(identifier, icebergSchema, spec, properties); + } else { + icebergTable = icebergCatalog.createTable(identifier, icebergSchema, spec, hiveLocation, properties); + } + + String metadataLocation = getMetadataLocation(icebergTable); + + String nameMapping = + PropertyUtil.propertyAsString(icebergTable.properties(), TableProperties.DEFAULT_NAME_MAPPING, null); + MetricsConfig metricsConfig = MetricsConfig.fromProperties(icebergTable.properties()); + + List<ManifestFile> manifestFiles = null; + try { + if (spec.isUnpartitioned()) { + manifestFiles = + migrateUnpartitionedTable(spec, fileFormat, hiveLocation, nameMapping, metricsConfig, metadataLocation); + } else { + manifestFiles = + migratePartitionedTable(spec, tableSource, nameMapping, fileFormat, metricsConfig, metadataLocation); + } + + AppendFiles append = icebergTable.newAppend(); + manifestFiles.forEach(append::appendManifest); + append.commit(); + } catch (Exception e) { + LOGGER.error("Migrate hive table to iceberg table failed.", e); Review comment: yes,I add the `drop table` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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