Feedback on whether index was created on materialized views in postgresql

I created a unique index for a materialized view as :

create unique index if not exists matview_key on
      matview (some_group_id, some_description);

I can’t tell if it has been created
How do I see the index?

Thank you!

>Solution :

Two ways to verify index creation:

--In psql
\d matview

--Using SQL

select 
  * 
from 
   pg_indexes 
where 
   indexname = 'matview_key' 
and 
   tablename = 'matview';

More information on pg_indexes.