👀 Views: 109 💬 Answers: 1 📅 Created: 2025-06-12

sqlite json dynamic-sql SQL

I've been banging my head against this for hours. I'm learning this framework and I keep running into I'm working on a SQLite 3.38.0 project where I'm trying to use the JSON1 extension to extract values from a JSON object stored in a text column... The scenario arises when I attempt to dynamically access a column name that is passed as a variable in my query. I’m using the following query: ```sql SELECT json_extract(data, '$.' || column_name) AS value FROM my_table WHERE id = ?; ``` In this case, `column_name` is a variable that holds the name of the JSON key I want to extract. However, I keep getting an behavior: `behavior: no such column: column_name`. I've verified that `data` contains valid JSON and that the `column_name` variable holds the actual key I expect. I've tried various methods to ensure the correct formatting, such as concatenating strings and using parameter binding, but nothing seems to work. When I hard-code a specific JSON key in place of `column_name`, the query executes perfectly. Here's the snippet where I set the `column_name` variable: ```python a = 'example_key' c.execute("SELECT json_extract(data, '$.' || ?) AS value", (a,)) ``` I've also checked that the SQLite version I'm using supports the JSON1 extension, and it does. Does anyone have insights into why this dynamic approach fails while hard-coding works? Am I missing something in the syntax or the execution of the query? For context: I'm using Sql on Linux. Any help would be greatly appreciated! I'm coming from a different tech stack and learning Sql. Hoping someone can shed some light on this. Thanks for any help you can provide! For context: I'm using Sql on macOS. Any ideas what could be causing this?