MySQL: implementing JSON_EXTRACT returning NULL for Nested JSON Objects
I've been banging my head against this for hours. I'm working with a scenario while trying to extract data from a nested JSON object in MySQL 8.0. I have a table called `orders` with a column named `order_details` which stores JSON data. Here's a sample structure of what the JSON looks like: ```json { "order_id": 123, "customer": { "name": "John Doe", "address": "123 Main St" }, "items": [ { "product_id": 1, "quantity": 2 }, { "product_id": 2, "quantity": 1 } ] } ``` I'm trying to extract the customer's name and the quantity of the first item in each order using the following query: ```sql SELECT JSON_EXTRACT(order_details, '$.customer.name') AS customer_name, JSON_EXTRACT(order_details, '$.items[0].quantity') AS first_item_quantity FROM orders; ``` However, the query returns NULL for both columns. When I run a simplified version just to test the JSON extraction, like this: ```sql SELECT JSON_EXTRACT('{"customer":{"name":"John Doe"}}', '$.customer.name'); ``` It returns the expected result of "John Doe". I've checked the data type of `order_details` and confirmed it's set to `JSON`. I also verified that there are indeed entries in the `orders` table with valid JSON data. I'm wondering if there's a specific edge case I am missing here regarding nested JSON objects or if there might be an scenario with the way I'm referencing the elements. Any insights or solutions would be greatly appreciated! This is part of a larger CLI tool I'm building. Am I missing something obvious? My development environment is Ubuntu. What am I doing wrong?