QUERY PLAN
GroupAggregate (cost=917.25..917.72 rows=21 width=44)
Group Key: c.project_id
-> Sort (cost=917.25..917.30 rows=21 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=745.20..916.79 rows=21 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=377.36..470.53 rows=6211 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..312.19 rows=6517 width=24)
Filter: (NOT is_draft)
-> Hash (cost=367.58..367.58 rows=21 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..367.58 rows=21 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{3837,3895,3820,3867,3933,3932,3936,3908,3907,3818}'::integer[])))