QUERY PLAN
GroupAggregate (cost=928.28..928.75 rows=21 width=44)
Group Key: c.project_id
-> Sort (cost=928.28..928.33 rows=21 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=753.99..927.82 rows=21 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=381.98..476.36 rows=6292 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..316.00 rows=6598 width=24)
Filter: (NOT is_draft)
-> Hash (cost=371.75..371.75 rows=21 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..371.75 rows=21 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{1791,3958,3577,3955,3927,3957,3947,3874,3934,3950}'::integer[])))