advanced patterns with MySQL JSON_ARRAY in GROUP BY Clause
I'm confused about I'm not sure how to approach I'm prototyping a solution and I've looked through the documentation and I'm still confused about I'm working on a personal project and I am working with an scenario with MySQL 8.0 where I am trying to use the `JSON_ARRAY` function within a `GROUP BY` clause..... My goal is to aggregate user data and create a JSON array of their associated tags. However, I am getting unexpected results. When I run the following query: ```sql SELECT user_id, JSON_ARRAYAGG(tag_name) AS tags FROM user_tags GROUP BY user_id; ``` I expect to see one row for each `user_id` with a JSON array of their tags. Instead, I am consistently getting the following behavior: ``` behavior 3100 (22003): Result of JSON_ARRAYAGG() is too large ``` I have checked the `max_allowed_packet` setting, and it is set to 16MB, which I believe should be sufficient. I attempted to limit the number of tags included by adding a `WHERE` clause to filter tags based on a specific condition: ```sql SELECT user_id, JSON_ARRAYAGG(tag_name) AS tags FROM user_tags WHERE tag_status = 'active' GROUP BY user_id; ``` However, I still encounter the same behavior. I have also tried breaking down the query into smaller parts and aggregating tags for each user in a subquery, but that approach resulted in slower performance and did not solve the scenario. Is there a recommended way to aggregate large JSON arrays in MySQL, or is there an alternate strategy to avoid hitting the size limit? Any insights on optimizing this query would be greatly appreciated! I'm working on a web app that needs to handle this. How would you solve this? For context: I'm using Sql on Linux. Has anyone else encountered this? Thanks in advance! What's the best practice here? I'm coming from a different tech stack and learning Sql.