PostgreSQL scenarios: Uncaught handling When Using CTE with Recursive Queries for Large Data Sets
I'm prototyping a solution and I've been working on this all day and I'm working through a tutorial and Quick question that's been bugging me - I'm currently working on a PostgreSQL 14 application where I'm trying to retrieve a hierarchical structure from a large dataset using a Common Table Expression (CTE) with recursion. The query works fine for smaller datasets, but when I attempt to run it against a dataset with over 10,000 records, it throws an behavior: `behavior: recursion limit exceeded in recursive query`. Here’s the CTE query I’m using: ```sql WITH RECURSIVE org_chart AS ( SELECT id, name, manager_id FROM employees WHERE manager_id IS NULL -- Start with top-level managers UNION ALL SELECT e.id, e.name, e.manager_id FROM employees e INNER JOIN org_chart o ON e.manager_id = o.id ) SELECT * FROM org_chart; ``` I’ve tried increasing the recursion limit by using `SET max_recursion_depth = 100;`, but it doesn't seem to resolve the scenario as the dataset increases. I also noticed that the CTE returns all records correctly for smaller datasets, and it seems to be the depth of recursion that causes the question. What are some best practices for managing recursive queries in PostgreSQL when dealing with large datasets? Do I need to refactor my approach, or is there a specific configuration I should consider to prevent hitting this recursion limit? Thanks in advance for any insights you can provide! This is part of a larger service I'm building. For reference, this is a production CLI tool. How would you solve this? Could someone point me to the right documentation?