QUERY PLAN
GroupAggregate (cost=916.64..916.80 rows=7 width=44)
Group Key: c.project_id
-> Sort (cost=916.64..916.66 rows=7 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=730.95..916.55 rows=7 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=410.51..511.28 rows=6718 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..340.28 rows=7023 width=24)
Filter: (NOT is_draft)
-> Hash (cost=320.35..320.35 rows=7 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..320.35 rows=7 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4082,3109,2755}'::integer[])))