QUERY PLAN
GroupAggregate (cost=81.64..81.66 rows=1 width=48)
Group Key: dg.id
-> Sort (cost=81.64..81.65 rows=1 width=286)
Sort Key: dg.id
-> Nested Loop Left Join (cost=0.29..81.63 rows=1 width=286)
Join Filter: (d.document_type_id = dg.id)
-> 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)
-> Seq Scan on tbl_document_types dg (cost=0.00..1.19 rows=19 width=278)