QUERY PLAN
Sort (cost=46.17..46.17 rows=1 width=403)
Sort Key: a.attnum
-> Nested Loop Left Join (cost=1.65..46.16 rows=1 width=403)
-> Nested Loop (cost=1.38..27.03 rows=1 width=1069)
-> Nested Loop Left Join (cost=1.09..26.63 rows=1 width=729)
-> Nested Loop (cost=0.82..26.14 rows=1 width=442)
-> Nested Loop (cost=0.41..9.65 rows=1 width=132)
Join Filter: (c.relnamespace = d.oid)
-> Index Scan using pg_class_relname_nsp_index on pg_class c (cost=0.41..8.42 rows=1 width=72)
Index Cond: (relname = 'tbl_visit_object_histories'::name)
-> Seq Scan on pg_namespace d (cost=0.00..1.21 rows=1 width=68)
Filter: (nspname = 'a57be577deb434'::name)
-> Index Scan using pg_attribute_relid_attnum_index on pg_attribute a (cost=0.41..16.44 rows=5 width=310)
Index Cond: ((attrelid = c.oid) AND (attnum > 0))
-> Index Scan using pg_attrdef_adrelid_adnum_index on pg_attrdef ad (cost=0.28..0.48 rows=1 width=293)
Index Cond: ((a.attrelid = adrelid) AND (a.attnum = adnum))
-> Index Scan using pg_type_oid_index on pg_type t (cost=0.28..0.40 rows=1 width=344)
Index Cond: (oid = a.atttypid)
Filter: (typname <> ''::name)
-> Index Scan using pg_constraint_conrelid_index on pg_constraint ct (cost=0.28..16.49 rows=1 width=27)
Index Cond: (conrelid = c.oid)
Filter: (contype = 'p'::"char")
SubPlan 1
-> Aggregate (cost=1.53..1.54 rows=1 width=32)
-> Seq Scan on pg_enum (cost=0.00..1.51 rows=7 width=64)
Filter: (enumtypid = a.atttypid)