Amazon Technologies, Inc.

Lakshmi Narasimha Guptha Munuhur Rajagopal

Akshat Vig

Almero Gouws

Somasundaram Perianayagam

Derek William Richard Chen-Becker

Stefano Stefani

Nicholas Gordon

Lewis Bruck

Haifeng He

Arturo Hinojosa

Aishwarya Kamal

Danielle Livneh

Olaf Anders Grette

Zoe Wheeler

Steven A Mayszak

Columns of a non-relational data store may be efficiently dropped. A drop column request for a table stored in a non-relational database may be received. In response to the drop column request, schema information for the table may be updated to filter out the column from subsequent read responses to read requests. A backup of the table is created and evaluated to identify those items in the table that include the column. The column is then deleted from the identified items.

Efficient drop column requests in a non-relational data store

A distributed database system maintains data for a database client by storing data on a plurality of storage nodes. Upon receiving a request from the database client in a first format, the database system translates the request to a second format and sends the translated request to a storage subsystem. The storage subsystem generates an exception if the translated request cannot be successfully completed. The distributed database system resends the translated request on behalf of the database client if the exception corresponds to a request that can be retried, and continues to resend the translated request until a first of an expiration of a predetermined time period or until the request completes successfully. The distributed database system sends a response to the database client based on the resent database request.

Distributed database exception handling

A service implements techniques for modifying a data table stored in a key-value or non-relational database via a table-oriented schema. In some aspects, a request to modify a table-oriented schema of a table of data may be received. In response to the request, an association between a customer identifier of elements of the table and an internal identifier of elements of the table may be stored that updates a prior association between a customer identifier and an internal identifier. The table-oriented schema of the table may be modified using one or more keys that are generated using the internal identifier.

Alter table implementation details with schema versioning

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Seattle, WA, United States of America

Lakshmi Narasimha Guptha Munuhur Rajagopal