QUERY PLAN
GroupAggregate (cost=827.91..828.18 rows=12 width=44)
Group Key: c.project_id
-> Sort (cost=827.91..827.94 rows=12 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=665.53..827.70 rows=12 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=310.84..310.84 rows=12 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..310.84 rows=12 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{3739,3692,3493,3297,3375,110}'::integer[])))