Can SELECT and INSERT Statements in a Stored Procedure Cause Race Conditions?

Stored Procedures, SELECT, INSERT, and Race Conditions

The example code shows an INSERT followed by a SELECT within a stored procedure, a common pattern in blog post tag management. This raises the question of race conditions, especially when multiple users might concurrently delete tags and create posts.

Database transactions are crucial for preventing such issues. Transactions group multiple database operations into an atomic unit. This means either all operations within the transaction succeed, or none do, maintaining data integrity.

PostgreSQL's transaction handling ensures that the INSERT and SELECT statements within a single stored procedure invocation execute serially, not concurrently. This serialization eliminates the possibility of race conditions disrupting data consistency.

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