QUERY PLAN
GroupAggregate (cost=917.13..917.29 rows=7 width=44)
Group Key: c.project_id
-> Sort (cost=917.13..917.15 rows=7 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=731.41..917.03 rows=7 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=410.53..511.32 rows=6719 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..340.29 rows=7024 width=24)
Filter: (NOT is_draft)
-> Hash (cost=320.79..320.79 rows=7 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..320.79 rows=7 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4168,3568,3544}'::integer[])))