QUERY PLAN
GroupAggregate (cost=846.92..847.28 rows=16 width=44)
Group Key: c.project_id
-> Sort (cost=846.92..846.96 rows=16 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=684.43..846.60 rows=16 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=354.54..442.59 rows=5870 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..292.78 rows=6176 width=24)
Filter: (NOT is_draft)
-> Hash (cost=329.69..329.69 rows=16 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..329.69 rows=16 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{3704,3701,3468,3241,3242,3086,2655,2590}'::integer[])))