MySQL: How to Handle JSON Data Type and Query Nested Values Efficiently?
After trying multiple solutions online, I still can't figure this out. I've been banging my head against this for hours... This might be a silly question, but I'm working with MySQL 8.0 and trying to optimize my queries that involve JSON data types. I have a table `orders` where one of the columns, `order_details`, is of type JSON. It stores an array of items like this: ```json [ {"item_id": 1, "quantity": 2}, {"item_id": 2, "quantity": 1} ] ``` I need to retrieve orders where a specific `item_id` is present in the `order_details`. For example, I want to find all orders that contain `item_id` 1. I've tried using `JSON_CONTAINS` like this: ```sql SELECT * FROM orders WHERE JSON_CONTAINS(order_details, '{"item_id": 1}', '$'); ``` However, it's returning unexpected results. Some orders that clearly contain `item_id` 1 are being omitted. I suspect it might be due to the way the JSON is structured or how I'm querying it. Additionally, I'm concerned about performance, as the `orders` table has over a million records, and I want to avoid full table scans if possible. I've also attempted to index the JSON column with a generated column but faced issues with the syntax and functionality. Could anyone provide insights on how to correctly query nested JSON values and improve performance for such queries in MySQL? Thanks in advance for any help! My development environment is Windows 11. I'm developing on Windows 11 with Sql.