PostgreSQL: Unexpected Behavior with JSONB Field in WHERE Clause on Indexed Table
Hey everyone, I'm running into an issue that's driving me crazy. I've been struggling with this for a few days now and could really use some help. I'm encountering a strange issue while querying a PostgreSQL 13 database where I'm trying to filter records based on a JSONB field in an indexed table. I have a table `users` with a JSONB column `profile` that stores various user attributes. I created a GIN index on this column to optimize queries, but I'm getting unexpected results when using the `@>` operator in the WHERE clause. Here's the SQL query I'm running: ```sql SELECT * FROM users WHERE profile @> '{"age": 30}'; ``` The intention of the query is to return all users whose profile contains an age of 30. However, I noticed that this query is returning no rows, even though I have users in the database whose profiles clearly include this age attribute. To troubleshoot, I checked the structure of the JSONB data and confirmed that the `age` key exists in several user profiles: ```json { "name": "John", "age": 30, "email": "john@example.com" } ``` I also ran the following query to see if any profiles contain the key-value pair: ```sql SELECT * FROM users WHERE profile ? 'age'; ``` This query returns the expected results, confirming that the key exists. I'm also aware that JSONB keys are case-sensitive, so I verified that the key 'age' is exactly as expected. I even tried using a different JSON structure to filter by other attributes, but the issue persists. Could there be an issue with the way the JSONB is indexed or with the query itself? I've ensured that the index was created properly with: ```sql CREATE INDEX idx_users_profile ON users USING gin (profile); ``` I would appreciate any insights into why the `@>` operator doesn't seem to be functioning as expected in this case and how I might resolve it. My development environment is Ubuntu. I'm developing on Windows 10 with Sql.