Load方法用于从表中检索单个项,因此需要提供整个主键、哈希和范围键。 在幕后,Load方法实际上从本地AWS DynamoDB API调用GetItem操作。这意味着您不能使用begins_with或任何其他函数。 您需要使用Query,例如: (查看英文版本获取更加准确信息)
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ScyllaDB University: Using the DynamoDB API in Scylla Blogs ScyllaDB Alternator: The Open Source DynamoDB-compatible API Going Head-to-Head: ScyllaDB vs Amazon DynamoDB One-Step Streaming Migration from DynamoDB into Scylla Load Balancing in ScyllaDB Alternator ...
问Dynamodb GetBatchItem vs查询EN目前，我使用table.query通过匹配分区键并按排序键排序来获取项。现在...
CatalogItem item = mapper.load(CatalogItem.class, item.getId(), newDynamoDBMapperConfig(DynamoDBMapperConfig.ConsistentReads.CONSISTENT)); delete Deletes an item from the table. You must pass in an object instance of the mapped class.
It is possible to share this class across threads and it is thread-safe. DynamoDBMapper will start chucking DynamoDBMappingException while using the load, save and delete methods to demonstrate that domain courses are incorrectly marked or otherwise incompatible with this class. ...
Load Table Data It uses rows made of columns. In tables, it uses items made of attributes Read Table Data It uses SELECT statements and filtering statements. It uses GetItem, Query, and Scan. Manage Indexes It uses standard indexes created through SQL statements. Modifications to it occur auto...
Wenn Sie mehrere Linien ohne offensichtliche Ausreißer als Block sehen, zeigt dies eine weitgehend ausgeglichene Workload über die Elemente im gegebenen Zeitfenster an. Wenn Sie isolierte Punkte anstelle verbundener Linien im Diagramm sehen, zeigt dies ein Element, auf das nur für einen...
When using sort keys, be careful not to overload an single database node. For example, it'd be awful to have a model like this:class CustomerData extends db.Model { static KEY = { store: S.str } static SORT_KEY = { customer: S.str } } tx.create(CustomerData, { store: 'Wal...
MongoDB also offerssharding, which is similar to partitioning in DynamoDB. Sharding distributes data across multiple servers based on a shard key. Distributing data enables read and write operations to be spread across multiple servers, preventing a single server from overloading. ...