PostgreSQL: Unexpected Behavior with JSONB Array Operations in 15.1
I'm encountering an issue when trying to manipulate a JSONB array in PostgreSQL 15.1. I have a table called `users` with a column `preferences` that stores JSONB data. The goal is to update the `preferences` by removing an item from an array based on a condition. When I run my update statement, I expect the item to be removed, but it seems that the original array remains unchanged. Here’s a simplified version of my `preferences` structure: ```json { "notifications": ["email", "sms", "push"], "theme": "dark" } ``` I tried using the following query to remove "sms" from the `notifications` array: ```sql UPDATE users SET preferences = preferences - 'notifications' || jsonb_build_object('notifications', preferences->'notifications' - 'sms') WHERE id = 1; ``` However, after executing this query, when I check the `preferences` again, the `notifications` array still includes "sms". The expected result should be: ```json { "notifications": ["email", "push"], "theme": "dark" } ``` I’ve also tried using the `jsonb_set` function and the `jsonb_array_remove` function without success. Here’s one of the attempts: ```sql UPDATE users SET preferences = jsonb_set(preferences, '{notifications}', (preferences->'notifications' - 'sms')) WHERE id = 1; ``` But this also doesn’t change the array as expected. I am looking for insights or solutions on how to successfully remove an item from a JSONB array. Are there specific nuances in the operations that I'm missing? Any help would be greatly appreciated!