网页-网络报错 https://us-east-2.console.aws.amazon.com/api/prod/presign Invalid ConditionExpression: Attribute name is a reserved keyword; reserved keyword: key key不能用关键字key 新建的策略,发现找不到了。看url发现是不同的iam,能搜
DynamoDB 的数据模型非常灵活，可以根据需要对数据进行读取和写入。此外，DynamoDB 还提供了强大的数据查询...
...reservedKeyWordColumn){ ListMapString,String>> list = new ArrayList(); MapString, AttributeValue...MapString,String>> list1 = parseToList(result,columnNames,rColumnNames); list.addAll(list1); while...getValuesByParam(String key, Object keyValue, String param) { Item item = query(...
</param> /// <returns>A Boolean value indicating the success of the operation.</returns> public static async Task<bool> CreateMovieTableAsync(AmazonDynamoDBClient client, string tableName) { var response = await client.CreateTableAsync(new CreateTableRequest { TableName = tableName, At...
Add a new list and a new map. aws dynamodb update-item \ --table-name ProductCatalog \ --key '{"Id":{"N":"789"}}' \ --update-expression "SET RelatedItems = :ri, ProductReviews = :pr" \ --expression-attribute-values file://values.json \ --return-values ALL_NEW ...
想要理解 DynamoDB，首先要理解 Consistent Hashing。Consistent Hashing 的原理如下图所示：
// Return a single song, by primary key { TableName: "Music", KeyConditionExpression: "Artist = :a and SongTitle = :t", ExpressionAttributeValues: { ":a": "No One You Know", ":t": "Call Me Today" } } // Return all of the songs by an artist { TableName: "Music", KeyCon...
In an expression, you use a document path to tell DynamoDB where to find an attribute. For a top-level attribute, the document path is simply the attribute name. For a nested attribute, you construct the document path using dereference operators. The following are some examples of document ...