Xue Qin Zhang

US Patent:

20230081900, Mar 16, 2023

Filed:

Sep 15, 2021

Appl. No.:

17/476403

Inventors:

- New York NY, US
Xue Zhang - Astoria NY, US

International Classification:

G06F 16/23
G06F 16/21
G06F 16/22

Abstract:

Methods and systems for executing transactional schema changes at a database are provided. The method includes receiving, at a gateway node of a cluster of database nodes, a statement corresponding to a schema of a database stored by the cluster, wherein a parent transaction comprises the statement, the statement comprises a schema change operation to modify the schema, and a first version of one or more versions of a descriptor comprises the schema. The method includes generating, by the parent transaction and using one or more child transactions, a version of a synthetic descriptor comprising an updated schema with an added schema element configured to be available for the parent transaction. The method includes writing the synthetic descriptor as an updated version of the descriptor, wherein the updated version comprises the updated schema with the added schema element in a publicly available state. The method includes committing the parent transaction.