QUERY PLAN
Sort (cost=240122.22..240122.22 rows=1 width=322)
Sort Key: fns.nspname, fc.relname, a.attnum
-> Nested Loop Left Join (cost=45.97..240122.21 rows=1 width=322)
-> Nested Loop Left Join (cost=45.55..240121.77 rows=1 width=289)
-> Nested Loop Left Join (cost=45.42..240121.61 rows=1 width=229)
-> Nested Loop (cost=45.13..240121.31 rows=1 width=161)
Join Filter: (c.oid = a.attrelid)
-> Nested Loop (cost=44.71..240119.95 rows=3 width=126)
Join Filter: (c.relnamespace = ns.oid)
-> Seq Scan on pg_namespace ns (cost=0.00..1.10 rows=1 width=4)
Filter: (nspname = 'a57be577deb434'::name)
-> Hash Join (cost=44.71..240118.33 rows=41 width=130)
Hash Cond: (ct.conrelid = c.oid)
-> ProjectSet (cost=0.00..68727.08 rows=13572000 width=123)
-> Seq Scan on pg_constraint ct (cost=0.00..765.29 rows=13572 width=118)
Filter: (contype = 'f'::"char")
-> Hash (cost=44.57..44.57 rows=11 width=8)
-> Bitmap Heap Scan on pg_class c (cost=4.50..44.57 rows=11 width=8)
Recheck Cond: (relname = 'tbl_contacts'::name)
-> Bitmap Index Scan on pg_class_relname_nsp_index (cost=0.00..4.49 rows=11 width=0)
Index Cond: (relname = 'tbl_contacts'::name)
-> Index Scan using pg_attribute_relid_attnum_index on pg_attribute a (cost=0.42..0.44 rows=1 width=70)
Index Cond: ((attrelid = ct.conrelid) AND (attnum = (ct.conkey)[(generate_subscripts(ct.conkey, 1))]))
-> Index Scan using pg_class_oid_index on pg_class fc (cost=0.29..0.31 rows=1 width=72)
Index Cond: (oid = ct.confrelid)
-> Index Scan using pg_namespace_oid_index on pg_namespace fns (cost=0.13..0.15 rows=1 width=68)
Index Cond: (fc.relnamespace = oid)
-> Index Scan using pg_attribute_relid_attnum_index on pg_attribute fa (cost=0.42..0.44 rows=1 width=70)
Index Cond: ((attrelid = ct.confrelid) AND (attnum = (ct.confkey)[(generate_subscripts(ct.conkey, 1))]))