JingsongLi commented on code in PR #540: URL: https://github.com/apache/flink-table-store/pull/540#discussion_r1108235271
########## flink-table-store-connector/src/main/java/org/apache/flink/table/store/connector/action/InsertChangesAction.java: ########## @@ -0,0 +1,192 @@ +/* + * 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.flink.table.store.connector.action; + +import org.apache.flink.api.java.tuple.Tuple3; +import org.apache.flink.api.java.utils.MultipleParameterTool; +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.table.api.EnvironmentSettings; +import org.apache.flink.table.api.Table; +import org.apache.flink.table.api.bridge.java.StreamTableEnvironment; +import org.apache.flink.table.data.GenericRowData; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.data.conversion.DataStructureConverter; +import org.apache.flink.table.data.conversion.DataStructureConverters; +import org.apache.flink.table.store.connector.sink.FlinkSinkBuilder; +import org.apache.flink.table.store.table.FileStoreTable; +import org.apache.flink.types.RowKind; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.List; +import java.util.Optional; +import java.util.stream.Collectors; + +import static org.apache.flink.table.store.connector.action.Action.getTablePath; + +/** + * Insert changes from given query to a table. The run() method works in following steps: + * + * <ul> + * <li>Get {@link Table} queriedTable from given query. + * <li>Transform the queriedTable to changelog {@link DataStream} with internal {@link RowData}. + * The row kind is extracted from the first column, and the fields is from left fields of the + * original row. + * <li>Build a sink from the data stream and the target table then execute. + * </ul> + */ +public class InsertChangesAction extends ActionBase { + + private static final Logger LOG = LoggerFactory.getLogger(InsertChangesAction.class); + + private final String query; + + InsertChangesAction(String warehouse, String database, String tableName, String query) { + super(warehouse, database, tableName); + if (((FileStoreTable) table).schema().primaryKeys().isEmpty()) { + throw new UnsupportedOperationException( + "insert-changes action doesn't support table with no primary keys defined."); + } + this.query = query; + } + + public static Optional<Action> create(String[] args) { + LOG.info("insert-changes job args: {}", String.join(" ", args)); + + MultipleParameterTool params = MultipleParameterTool.fromArgs(args); + + if (params.has("help")) { + printHelp(); + return Optional.empty(); + } + + Tuple3<String, String, String> tablePath = getTablePath(params); + if (tablePath == null) { + return Optional.empty(); + } + + String query = params.get("query"); + if (query == null) { + return Optional.empty(); + } + + InsertChangesAction action = + new InsertChangesAction(tablePath.f0, tablePath.f1, tablePath.f2, query); + + return Optional.of(action); + } + + private static void printHelp() { + System.out.println("Action \"insert-changes\" apply changes from given query to a table."); + System.out.println(); + + System.out.println("Syntax:"); + System.out.println( + " insert-changes --warehouse <warehouse-path> --database <database-name> " + + "--table <table-name> --query <query-statement>"); + System.out.println(" insert-changes --path <table-path> --query <query-statement>"); + System.out.println(); + + System.out.println("Note: "); + System.out.println( + " 1. the result's first column of the <query-statement> must be RowKind:"); + System.out.println(" +I: newly added row"); + System.out.println(" +U: updated row with new content"); + System.out.println(" -D: deleted row"); + System.out.println( + " 2. make sure the schema of query result after discarding the first column is the same as the <table-name>"); + + System.out.println(); + + System.out.println("Examples:"); + System.out.println( + " insert-changes --warehouse hdfs:///path/to/warehouse --database test_db --table test_table --query SELECT '-D', k, v FROM test_table"); + System.out.println( + " It will insert all records from test_table with RowKind '-D' to test_table"); + } + + @Override + public void run() throws Exception { + StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); + StreamTableEnvironment tEnv = + StreamTableEnvironment.create(env, EnvironmentSettings.inBatchMode()); + + registerAndUseCatalog(tEnv); + + Table queriedTable = tEnv.sqlQuery(query); + + List<DataStructureConverter<Object, Object>> converters = + queriedTable.getResolvedSchema().getColumnDataTypes().stream() + .map(DataStructureConverters::getConverter) + .collect(Collectors.toList()); + + DataStream<RowData> dataStream = + tEnv.toChangelogStream(queriedTable) + .map( + row -> { + RowKind kind; + try { + String shortString = row.getFieldAs(0); + switch (shortString) { + case "+I": + kind = RowKind.INSERT; + break; + case "+U": + kind = RowKind.UPDATE_AFTER; + break; + case "-D": + kind = RowKind.DELETE; + break; + default: + throw new UnsupportedOperationException( + String.format( + "Row kind '%s' of row '%s' is not supported in insert-changes action.", + shortString, row)); + } + } catch (Throwable t) { + LOG.error( + String.format( + "Wrong schema of row '%s' in insert-changes action.", + row), + t); + throw new RuntimeException( + String.format( + "Wrong schema of row '%s' in insert-changes action.", + row), + t); + } + + int arity = row.getArity(); + GenericRowData rowData = new GenericRowData(kind, arity); + for (int i = 1; i < arity; i++) { + rowData.setField( + i - 1, + converters + .get(i) + .toInternalOrNull(row.getField(i))); + } + return rowData; + }); + + new FlinkSinkBuilder((FileStoreTable) table).withInput(dataStream).build(); Review Comment: `withLockFactory()` from catalog lock. -- This is an automated message from the Apache Git Service. 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