QUERY PLAN
GroupAggregate (cost=88.75..88.77 rows=1 width=48)
Group Key: tt.id
-> Sort (cost=88.75..88.76 rows=1 width=24)
Sort Key: tt.id
-> Nested Loop Left Join (cost=0.73..88.74 rows=1 width=24)
-> Nested Loop Left Join (cost=0.58..88.52 rows=1 width=12)
-> Nested Loop (cost=0.29..80.20 rows=1 width=12)
-> Seq Scan on tbl_documents d (cost=0.00..13.62 rows=8 width=16)
Filter: (department_id = 1)
-> Index Scan using tbl_term_taxonomy_relationships_object_id_term_id_idx on tbl_term_taxonomy_relationships dt (cost=0.29..8.31 rows=1 width=4)
Index Cond: ((object_id = d.id) AND (term_id = 7))
Filter: (taxonomy_id = 116)
-> Index Scan using tbl_term_taxonomy_relationships_object_id_term_id_idx on tbl_term_taxonomy_relationships ttr (cost=0.29..8.31 rows=1 width=8)
Index Cond: ((object_id = d.id) AND (term_id = 7))
-> Index Scan using tbl_term_taxonomies_pkey on tbl_term_taxonomies tt (cost=0.15..0.22 rows=1 width=16)
Index Cond: (ttr.taxonomy_id = id)