QUERY PLAN
GroupAggregate (cost=665.53..837.16 rows=2 width=44)
Group Key: c.project_id
-> Hash Right Join (cost=665.53..837.12 rows=2 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=288.14..288.14 rows=2 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..288.14 rows=2 width=8)
Filter: ((case_type = 2) AND (project_id = 3935))