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Visit this link https://tapoueh.org/blog/2018/07/postgresql-concurrency-isolation-and-locking/

Look at locking in PostgreSQL found all locking option here https://www.postgresql.org/docs/current/explicit-locking.html

PostgresSql follows a MVCC model. So the database itself will take care of locking/updating resources.

https://www.postgresql.org/docs/current/mvcc-intro.html

https://www.postgresql.org/message-id/CALL-XePNn4cfD_80aaXZg%3DHb1zWo1VpcZCH3K%2BUdaD9gWcZQ5A%40mail.gmail.com

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