JSON_CONTAINS() in postgresql - mysql

Question

Using MySQL 5.7, I want to know the PostgreSQL equivalent of
SELECT * FROM user_conversations WHERE JSON_CONTAINS(users, JSON_ARRAY(1))
How do you write JSON_CONTAINS(users, JSON_ARRAY(1)) in PostgreSQL
EDIT 1
there is my json it's just an array without son object :
[
"john",
"doe",
"does"
]
i want to get "doe" for exemple
EDIT 2
My table :
Column | Type | Modifiers | Storage | Statistics Target | Description
------------+--------------------------------+-------------------------------------------------------+----------+-----------------------+-------------
id | uuid | non NULL | plain | |
name | character varying(255) | non NULL | extended | |
image | character varying(255) | non NULL Par défaut, 'default.png'::character varying | extended | |
users | json | non NULL | extended | |
type | integer | non NULL | plain | |
emoji_id | integer | non NULL Par défaut, 0 | plain | |
created_at | timestamp(0) without time zone | | plain | |
updated_at | timestamp(0) without time zone |
EDIT 3:
I use laravel to execute queries :
DB::table('user_conversations')->whereRaw('JSON_CONTAINS(users, JSON_ARRAY(1))')->orderBy('created_at', 'desc')->paginate(5);
and it's work with mysql.

Answer 1

The two argument form of MySQL's JSON_CONTAINS() you cite has a signature of JSON_CONTAINS(json_doc, val) That sounds similar to the PostgreSQL JSON operator #> operator
-- returns true
SELECT '["john","bob","doe","dylan","mike","does"]'::jsonb #>
'["john","doe","does"]';
-- returns false
SELECT '["john","bob","doe","dylan","mike","does"]'::jsonb #>
'["john","mary"]';
If your type is json, that's fine just cast it to jsonb;
SELECT *
FROM user_conversations
WHERE users::jsonb #> json_text;