QUERY PLAN
Aggregate (cost=6381.49..6381.50 rows=1 width=8)
-> Gather (cost=1000.00..6381.49 rows=1 width=0)
Workers Planned: 2
-> Parallel Seq Scan on tbl_comments (cost=0.00..5381.39 rows=1 width=0)
Filter: (((object_type)::text = '20012'::text) AND (object_id = 2138))