Creating a Snapshot of the Database Table
To create a consistent snapshot of the database table, PostgreSQL uses a combination of transaction IDs and visibility information. When a transaction begins, PostgreSQL records the transaction ID and uses it to determine which rows are visible to the transaction.
Example:
-- Example of creating a snapshot in PostgreSQL
BEGIN;
SELECT * FROM your_table;
COMMIT;
Multiversion Concurrency Control (MVCC) in PostgreSQL
PostgreSQL is a powerful open-source relational database management system known for its robustness and reliability. One of its key features that sets it apart from other databases is Multiversion Concurrency Control (MVCC). MVCC allows multiple transactions to occur concurrently while ensuring data consistency and integrity.
In this article, We will learn about Getting Started with Multiversion Concurrency Control (MVCC) in PostgreSQL in detail.