QUERY PLAN
GroupAggregate (cost=927.36..927.56 rows=9 width=44)
Group Key: c.project_id
-> Sort (cost=927.36..927.38 rows=9 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=741.62..927.21 rows=9 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=331.00..331.00 rows=9 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..331.00 rows=9 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4172,4169,4168,4157}'::integer[])))