公开(公告)号：US11860835B1

公开(公告)日：2024-01-02

申请号：US16915879

申请日：2020-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Akshat Vig ,  Almero Gouws ,  Steven A Mayszak ,  Olaf Anders Grette ,  Arturo Hinojosa ,  Lakshmi Narasimha Guptha Munuhur Rajagopal ,  Nicholas Gordon ,  Somasundaram Perianayagam

IPC: G06F16/215 ,  G06F16/22 ,  G06F16/23

CPC classification number: G06F16/215 ,  G06F16/221 ,  G06F16/2365

Abstract: 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.