QUERY PLAN
Sort (cost=48.27..48.27 rows=1 width=403)
Sort Key: a.attnum
-> Nested Loop Left Join (cost=1.65..48.26 rows=1 width=403)
-> Nested Loop (cost=1.38..27.75 rows=1 width=1067)
-> Nested Loop Left Join (cost=1.09..27.39 rows=1 width=727)
-> Nested Loop (cost=0.82..27.03 rows=1 width=442)
-> Nested Loop (cost=0.41..9.62 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_registrations'::name)
-> Seq Scan on pg_namespace d (cost=0.00..1.19 rows=1 width=68)
Filter: (nspname = 'global'::name)
-> Index Scan using pg_attribute_relid_attnum_index on pg_attribute a (cost=0.41..17.35 rows=6 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..0.36 rows=1 width=291)
Index Cond: ((a.attrelid = adrelid) AND (a.attnum = adnum))
-> Index Scan using pg_type_oid_index on pg_type t (cost=0.28..0.36 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..16.87 rows=1 width=27)
Index Cond: (conrelid = c.oid)
Filter: (contype = 'p'::"char")
SubPlan 1
-> Aggregate (cost=2.53..2.54 rows=1 width=32)
-> Seq Scan on pg_enum (cost=0.00..2.51 rows=7 width=64)
Filter: (enumtypid = a.atttypid)