jackye1995 commented on a change in pull request #2688: URL: https://github.com/apache/iceberg/pull/2688#discussion_r649432820
########## File path: aws/src/main/java/org/apache/iceberg/aws/dynamodb/DynamoDbCatalog.java ########## @@ -0,0 +1,613 @@ +/* + * 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.aws.dynamodb; + +import java.io.Closeable; +import java.io.IOException; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.UUID; +import java.util.stream.Collectors; +import org.apache.hadoop.conf.Configurable; +import org.apache.hadoop.conf.Configuration; +import org.apache.iceberg.BaseMetastoreCatalog; +import org.apache.iceberg.CatalogProperties; +import org.apache.iceberg.CatalogUtil; +import org.apache.iceberg.TableMetadata; +import org.apache.iceberg.TableOperations; +import org.apache.iceberg.aws.AwsClientFactories; +import org.apache.iceberg.aws.AwsProperties; +import org.apache.iceberg.aws.s3.S3FileIO; +import org.apache.iceberg.catalog.Namespace; +import org.apache.iceberg.catalog.SupportsNamespaces; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.exceptions.AlreadyExistsException; +import org.apache.iceberg.exceptions.NamespaceNotEmptyException; +import org.apache.iceberg.exceptions.NoSuchNamespaceException; +import org.apache.iceberg.exceptions.NoSuchTableException; +import org.apache.iceberg.exceptions.ValidationException; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.relocated.com.google.common.annotations.VisibleForTesting; +import org.apache.iceberg.relocated.com.google.common.base.Joiner; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; +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.Tasks; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import software.amazon.awssdk.services.dynamodb.DynamoDbClient; +import software.amazon.awssdk.services.dynamodb.model.AttributeDefinition; +import software.amazon.awssdk.services.dynamodb.model.AttributeValue; +import software.amazon.awssdk.services.dynamodb.model.BillingMode; +import software.amazon.awssdk.services.dynamodb.model.ConditionalCheckFailedException; +import software.amazon.awssdk.services.dynamodb.model.CreateTableRequest; +import software.amazon.awssdk.services.dynamodb.model.Delete; +import software.amazon.awssdk.services.dynamodb.model.DeleteItemRequest; +import software.amazon.awssdk.services.dynamodb.model.DescribeTableRequest; +import software.amazon.awssdk.services.dynamodb.model.DescribeTableResponse; +import software.amazon.awssdk.services.dynamodb.model.GetItemRequest; +import software.amazon.awssdk.services.dynamodb.model.GetItemResponse; +import software.amazon.awssdk.services.dynamodb.model.GlobalSecondaryIndex; +import software.amazon.awssdk.services.dynamodb.model.KeySchemaElement; +import software.amazon.awssdk.services.dynamodb.model.KeyType; +import software.amazon.awssdk.services.dynamodb.model.Projection; +import software.amazon.awssdk.services.dynamodb.model.ProjectionType; +import software.amazon.awssdk.services.dynamodb.model.Put; +import software.amazon.awssdk.services.dynamodb.model.PutItemRequest; +import software.amazon.awssdk.services.dynamodb.model.QueryRequest; +import software.amazon.awssdk.services.dynamodb.model.QueryResponse; +import software.amazon.awssdk.services.dynamodb.model.ResourceNotFoundException; +import software.amazon.awssdk.services.dynamodb.model.ScalarAttributeType; +import software.amazon.awssdk.services.dynamodb.model.TableStatus; +import software.amazon.awssdk.services.dynamodb.model.TransactWriteItem; +import software.amazon.awssdk.services.dynamodb.model.TransactWriteItemsRequest; +import software.amazon.awssdk.services.dynamodb.model.UpdateItemRequest; + +/** + * DynamoDB implementation of Iceberg catalog + */ +public class DynamoDbCatalog extends BaseMetastoreCatalog implements Closeable, SupportsNamespaces, Configurable { + + private static final Logger LOG = LoggerFactory.getLogger(DynamoDbCatalog.class); + private static final int CATALOG_TABLE_CREATION_WAIT_ATTEMPTS_MAX = 5; + static final Joiner COMMA = Joiner.on(','); + + private static final String GSI_NAMESPACE_IDENTIFIER = "namespace-identifier"; + private static final String COL_IDENTIFIER = "identifier"; + private static final String COL_IDENTIFIER_NAMESPACE = "NAMESPACE"; + private static final String COL_NAMESPACE = "namespace"; + private static final String PROPERTY_COL_PREFIX = "p."; Review comment: > is there a reason we wouldn't just use a map in DynamoDB for these properties The biggest consideration was that in case any user would like to build additional custom index on any property, then it would not be possible on a nested type. One example is that people usually store owner information for tables and namespaces as properties and might build index to search on that. > might want to split out some of the well known values to top level properties Currently the approach has the simplicity that namespace and table are stored using the same principle, where namespace properties and the 3 table properties (metadata_location, previous_metadata_location, table_type) are stored in the same mechanism, which allows them to share some util methods. But I don't have strong opinion on this, if we think `location` is important I can move it out. But apart from that I don't see any other similar use cases. -- 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. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
