QUERY PLAN
GroupAggregate (cost=928.76..929.47 rows=31 width=44)
Group Key: c.project_id
-> Sort (cost=928.76..928.84 rows=32 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=754.13..927.96 rows=32 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=381.98..476.36 rows=6292 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..316.00 rows=6598 width=24)
Filter: (NOT is_draft)
-> Hash (cost=371.75..371.75 rows=32 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..371.75 rows=32 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{3955,3716,3932,3944,3778,3387,3743,3906,3648,3032}'::integer[])))