yuxiqian commented on code in PR #6358: URL: https://github.com/apache/paimon/pull/6358#discussion_r2492736724
########## paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/pipeline/cdc/schema/PaimonMetadataApplier.java: ########## @@ -0,0 +1,362 @@ +/* + * 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.paimon.flink.pipeline.cdc.schema; + +import org.apache.paimon.catalog.Catalog; +import org.apache.paimon.catalog.Identifier; +import org.apache.paimon.flink.FlinkCatalogFactory; +import org.apache.paimon.flink.LogicalTypeConversion; +import org.apache.paimon.options.Options; +import org.apache.paimon.schema.SchemaChange; +import org.apache.paimon.table.Table; +import org.apache.paimon.table.sink.BatchTableCommit; + +import org.apache.flink.cdc.common.event.AddColumnEvent; +import org.apache.flink.cdc.common.event.AlterColumnTypeEvent; +import org.apache.flink.cdc.common.event.CreateTableEvent; +import org.apache.flink.cdc.common.event.DropColumnEvent; +import org.apache.flink.cdc.common.event.DropTableEvent; +import org.apache.flink.cdc.common.event.RenameColumnEvent; +import org.apache.flink.cdc.common.event.SchemaChangeEvent; +import org.apache.flink.cdc.common.event.SchemaChangeEventType; +import org.apache.flink.cdc.common.event.TableId; +import org.apache.flink.cdc.common.event.TruncateTableEvent; +import org.apache.flink.cdc.common.event.visitor.SchemaChangeEventVisitor; +import org.apache.flink.cdc.common.exceptions.SchemaEvolveException; +import org.apache.flink.cdc.common.exceptions.UnsupportedSchemaChangeEventException; +import org.apache.flink.cdc.common.schema.Schema; +import org.apache.flink.cdc.common.sink.MetadataApplier; +import org.apache.flink.cdc.common.types.utils.DataTypeUtils; +import org.apache.flink.shaded.guava31.com.google.common.collect.Sets; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import static org.apache.flink.cdc.common.utils.Preconditions.checkArgument; +import static org.apache.flink.cdc.common.utils.Preconditions.checkNotNull; + +/** A {@code MetadataApplier} that applies schema changes to Paimon table. */ +public class PaimonMetadataApplier implements MetadataApplier { + + private static final Logger LOG = LoggerFactory.getLogger(PaimonMetadataApplier.class); + + // Catalog is unSerializable. + private transient Catalog catalog; + + // currently, we set table options for all tables using the same options. + private final Map<String, String> tableOptions; + + private final Options catalogOptions; + + private final Map<TableId, List<String>> partitionMaps; + + private Set<SchemaChangeEventType> enabledSchemaEvolutionTypes; + + public PaimonMetadataApplier(Options catalogOptions) { + this.catalogOptions = catalogOptions; + this.tableOptions = new HashMap<>(); + this.partitionMaps = new HashMap<>(); + this.enabledSchemaEvolutionTypes = getSupportedSchemaEvolutionTypes(); + } + + public PaimonMetadataApplier( + Options catalogOptions, + Map<String, String> tableOptions, + Map<TableId, List<String>> partitionMaps) { + this.catalogOptions = catalogOptions; + this.tableOptions = tableOptions; + this.partitionMaps = partitionMaps; + this.enabledSchemaEvolutionTypes = getSupportedSchemaEvolutionTypes(); + } + + @Override + public MetadataApplier setAcceptedSchemaEvolutionTypes( + Set<SchemaChangeEventType> schemaEvolutionTypes) { + this.enabledSchemaEvolutionTypes = schemaEvolutionTypes; + return this; + } + + @Override + public boolean acceptsSchemaEvolutionType(SchemaChangeEventType schemaChangeEventType) { + return enabledSchemaEvolutionTypes.contains(schemaChangeEventType); + } + + @Override + public Set<SchemaChangeEventType> getSupportedSchemaEvolutionTypes() { + return Sets.newHashSet( + SchemaChangeEventType.CREATE_TABLE, + SchemaChangeEventType.ADD_COLUMN, + SchemaChangeEventType.DROP_COLUMN, + SchemaChangeEventType.RENAME_COLUMN, + SchemaChangeEventType.ALTER_COLUMN_TYPE); + } + + @Override + public void applySchemaChange(SchemaChangeEvent schemaChangeEvent) + throws SchemaEvolveException { + if (catalog == null) { + catalog = FlinkCatalogFactory.createPaimonCatalog(catalogOptions); + } + SchemaChangeEventVisitor.visit( + schemaChangeEvent, + addColumnEvent -> { + applyAddColumn(addColumnEvent); + return null; + }, + alterColumnTypeEvent -> { + applyAlterColumnType(alterColumnTypeEvent); + return null; + }, + createTableEvent -> { + applyCreateTable(createTableEvent); + return null; + }, + dropColumnEvent -> { + applyDropColumn(dropColumnEvent); + return null; + }, + dropTableEvent -> { + applyDropTable(dropTableEvent); + return null; + }, + renameColumnEvent -> { + applyRenameColumn(renameColumnEvent); + return null; + }, + truncateTableEvent -> { + applyTruncateTable(truncateTableEvent); + return null; + }); + } + + @Override + public void close() throws Exception { + if (catalog != null) { + catalog.close(); + } + } + + private void applyCreateTable(CreateTableEvent event) throws SchemaEvolveException { + try { + if (!catalog.listDatabases().contains(event.tableId().getSchemaName())) { + catalog.createDatabase(event.tableId().getSchemaName(), true); + } + Schema schema = event.getSchema(); + org.apache.paimon.schema.Schema.Builder builder = + new org.apache.paimon.schema.Schema.Builder(); + schema.getColumns() + .forEach( + (column) -> + builder.column( + column.getName(), + LogicalTypeConversion.toDataType( + DataTypeUtils.toFlinkDataType(column.getType()) + .getLogicalType()), + column.getComment())); + List<String> partitionKeys = new ArrayList<>(); + List<String> primaryKeys = schema.primaryKeys(); + if (partitionMaps.containsKey(event.tableId())) { + partitionKeys.addAll(partitionMaps.get(event.tableId())); + } else if (schema.partitionKeys() != null && !schema.partitionKeys().isEmpty()) { + partitionKeys.addAll(schema.partitionKeys()); + } + builder.primaryKey(primaryKeys) Review Comment: Added it back for consistency. -- This is an automated message from the Apache Git Service. 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