Tartarus0zm commented on code in PR #22949: URL: https://github.com/apache/flink/pull/22949#discussion_r1252699371
########## flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/operations/ReplaceTableAsOperation.java: ########## @@ -0,0 +1,188 @@ +/* + * 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.operations; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.api.dag.Transformation; +import org.apache.flink.core.execution.JobClient; +import org.apache.flink.table.api.TableException; +import org.apache.flink.table.api.internal.TableResultInternal; +import org.apache.flink.table.catalog.Catalog; +import org.apache.flink.table.catalog.CatalogManager; +import org.apache.flink.table.catalog.ObjectIdentifier; +import org.apache.flink.table.catalog.ObjectPath; +import org.apache.flink.table.catalog.exceptions.TableNotExistException; +import org.apache.flink.table.operations.ddl.CreateTableOperation; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.concurrent.ExecutionException; +import java.util.stream.Collectors; + +import static org.apache.flink.table.api.config.TableConfigOptions.TABLE_DML_SYNC; + +/** Operation to describe a [CREATE OR] REPLACE TABLE AS statement. */ +@Internal +public class ReplaceTableAsOperation implements ModifyOperation, ExecutableOperation { + + private final CreateTableOperation createTableOperation; + private final QueryOperation sinkModifyQuery; + private final boolean isCreateOrReplace; + + public ReplaceTableAsOperation( + CreateTableOperation createTableOperation, + QueryOperation sinkModifyQuery, + boolean isCreateOrReplace) { + this.createTableOperation = createTableOperation; + this.sinkModifyQuery = sinkModifyQuery; + this.isCreateOrReplace = isCreateOrReplace; + } + + @Override + public QueryOperation getChild() { + return sinkModifyQuery; + } + + @Override + public <T> T accept(ModifyOperationVisitor<T> visitor) { + return visitor.visit(this); + } + + public CreateTableOperation getCreateTableOperation() { + return createTableOperation; + } + + @Override + public String asSummaryString() { + Map<String, Object> params = new LinkedHashMap<>(); + params.put("catalogTable", getCreateTableOperation().getCatalogTable()); + params.put("identifier", getCreateTableOperation().getTableIdentifier()); + + return OperationUtils.formatWithChildren( + isCreateOrReplace ? "CREATE OR REPLACE TABLE AS" : "REPLACE TABLE AS", + params, + Collections.singletonList(sinkModifyQuery), + Operation::asSummaryString); + } + + @Override + public TableResultInternal execute(Context ctx) { + CatalogManager catalogManager = ctx.getCatalogManager(); + ObjectIdentifier tableIdentifier = createTableOperation.getTableIdentifier(); + Optional<Catalog> optionalCatalog = + ctx.getCatalogManager().getCatalog(tableIdentifier.getCatalogName()); + ObjectPath objectPath = tableIdentifier.toObjectPath(); + + Catalog catalog = optionalCatalog.get(); + // rtas drop table first, then create + try { + // if is create or replace statement will ignore table not exist + catalog.dropTable(objectPath, isCreateOrReplace); + } catch (TableNotExistException e) { + throw new TableException( + String.format( + "The table %s to be replaced doesn't exist. You may want to use CREATE TABLE AS statement or CREATE OR REPLACE TABLE AS statement.", + tableIdentifier)); + } + + // first create table + CreateTableOperation executableCreateTableOperation = + new CreateTableOperation( + createTableOperation.getTableIdentifier(), + createTableOperation.getCatalogTable(), + false, + false); + executableCreateTableOperation.execute(ctx); + + // then insert into sink + SinkModifyOperation sinkModifyOperation = + new SinkModifyOperation( + catalogManager.getTableOrError(createTableOperation.getTableIdentifier()), + sinkModifyQuery, + Collections.emptyMap(), + null, // targetColumns + false, + Collections.emptyMap()); + + List<ModifyOperation> modifyOperations = Collections.singletonList(sinkModifyOperation); + List<Transformation<?>> transformations = ctx.translate(modifyOperations); + List<String> sinkIdentifierNames = extractSinkIdentifierNames(modifyOperations); + TableResultInternal result = ctx.executeInternal(transformations, sinkIdentifierNames); + if (ctx.getTableConfig().get(TABLE_DML_SYNC)) { + try { + result.await(); + } catch (InterruptedException | ExecutionException e) { + result.getJobClient().ifPresent(JobClient::cancel); + throw new TableException("Fail to wait execution finish.", e); + } + } + return result; + } + + /** + * extract sink identifier names from {@link ModifyOperation}s and deduplicate them with {@link + * #deduplicateSinkIdentifierNames(List)}. + */ + private List<String> extractSinkIdentifierNames(List<ModifyOperation> operations) { + List<String> tableNames = new ArrayList<>(operations.size()); + for (ModifyOperation operation : operations) { + if (operation instanceof SinkModifyOperation) { + String fullName = + ((SinkModifyOperation) operation) + .getContextResolvedTable() + .getIdentifier() + .asSummaryString(); + tableNames.add(fullName); + } else { + throw new UnsupportedOperationException("Unsupported operation: " + operation); + } + } + return deduplicateSinkIdentifierNames(tableNames); + } + + /** + * Deduplicate sink identifier names. If there are multiple tables with the same name, an index + * suffix will be added at the end of the name to ensure each name is unique. + */ + private List<String> deduplicateSinkIdentifierNames(List<String> tableNames) { Review Comment: ok -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
