PostgreSQL: Incremental Updates with RETURNING Clause Not Reflecting Latest Changes
I'm not sure how to approach I'm trying to implement I'm a bit lost with Could someone explain I tried several approaches but none seem to work....... I'm encountering an issue when trying to perform incremental updates on a PostgreSQL table using the `RETURNING` clause. I have a `products` table structured as follows: ```sql CREATE TABLE products ( id SERIAL PRIMARY KEY, name VARCHAR(100), stock INT, price DECIMAL(10, 2) ); ``` My goal is to update the stock of certain products while retrieving the updated records for further processing. However, I'm seeing that the `RETURNING` clause does not return the latest values after the updates. Here’s the SQL statement I’m using: ```sql UPDATE products SET stock = stock - 1 WHERE id IN (1, 2, 3) RETURNING *; ``` When I execute the update, the returned records still show the old stock values instead of reflecting the decremented values. This is especially puzzling since I expect that `RETURNING` should provide the updated state right after the operation. I’ve tried running this within a transaction to see if it behaves differently, but the issue persists. Here’s how I attempted it: ```sql BEGIN; UPDATE products SET stock = stock - 1 WHERE id IN (1, 2, 3) RETURNING *; COMMIT; ``` ``` In both cases, the values returned are not updated as expected, and I’m receiving this output: ``` id | name | stock | price ---+--------------+-------+------- 1 | Product A | 10 | 19.99 2 | Product B | 15 | 29.99 3 | Product C | 5 | 15.50 ``` I have also made sure that the IDs I’m referencing exist in the table and that there are no triggers or rules that might be affecting the stock updates. I’m running PostgreSQL version 13.2. Is there something specific I’m missing regarding the use of `RETURNING` or is there a better approach to ensure I get the updated values after the operation? My development environment is Ubuntu. Is there a better approach? For context: I'm using Sql on CentOS. I'm open to any suggestions. The stack includes Sql and several other technologies. Hoping someone can shed some light on this. This is for a desktop app running on Debian. Am I missing something obvious? I'm coming from a different tech stack and learning Sql.