QUERY PLAN
GroupAggregate (cost=720.67..906.33 rows=2 width=44)
Group Key: c.project_id
-> Hash Right Join (cost=720.67..906.29 rows=2 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=310.12..310.12 rows=2 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..310.12 rows=2 width=8)
Filter: ((case_type = 2) AND (project_id = 4024))