snuyanzin commented on code in PR #28287: URL: https://github.com/apache/flink/pull/28287#discussion_r3396537505
########## flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/operations/materializedtable/ConvertTableToMaterializedTableOperation.java: ########## @@ -0,0 +1,102 @@ +/* + * 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.materializedtable; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.table.api.internal.TableResultImpl; +import org.apache.flink.table.api.internal.TableResultInternal; +import org.apache.flink.table.catalog.ObjectIdentifier; +import org.apache.flink.table.catalog.ResolvedCatalogMaterializedTable; +import org.apache.flink.table.catalog.ResolvedCatalogTable; +import org.apache.flink.table.catalog.TableChange; +import org.apache.flink.table.operations.ExecutableOperation; +import org.apache.flink.table.operations.Operation; +import org.apache.flink.table.operations.OperationUtils; + +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.function.Function; + +/** + * Operation to describe an in-place conversion of an existing regular table to a materialized table + * via CREATE OR ALTER MATERIALIZED TABLE. + */ +@Internal +public class ConvertTableToMaterializedTableOperation + implements MaterializedTableOperation, ExecutableOperation { + + private final ObjectIdentifier tableIdentifier; + private final ResolvedCatalogTable originalTable; + private final ResolvedCatalogMaterializedTable materializedTable; + private final Function<ResolvedCatalogMaterializedTable, List<TableChange>> + tableChangesForTable; + private List<TableChange> tableChanges; + + public ConvertTableToMaterializedTableOperation( + ObjectIdentifier tableIdentifier, + ResolvedCatalogTable originalTable, + ResolvedCatalogMaterializedTable materializedTable, + Function<ResolvedCatalogMaterializedTable, List<TableChange>> tableChangesBuilder) { + this.tableIdentifier = tableIdentifier; + this.originalTable = originalTable; + this.materializedTable = materializedTable; + this.tableChangesForTable = tableChangesBuilder; + } + + @Override + public TableResultInternal execute(Context ctx) { + ctx.getCatalogManager() + .convertTableToMaterializedTable( + originalTable, materializedTable, getTableChanges(), tableIdentifier); + return TableResultImpl.TABLE_RESULT_OK; + } + + public ObjectIdentifier getTableIdentifier() { + return tableIdentifier; + } + + public ResolvedCatalogTable getOriginalTable() { + return originalTable; + } + + public ResolvedCatalogMaterializedTable getMaterializedTable() { + return materializedTable; + } + + public List<TableChange> getTableChanges() { + if (tableChanges == null) { + tableChanges = tableChangesForTable.apply(materializedTable); + } + return tableChanges; + } + + @Override + public String asSummaryString() { + final Map<String, Object> params = new LinkedHashMap<>(); Review Comment: why do we need `LinkedHashMap`? -- 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]
