qwerty005,

Попробуйте такой селект, используется для поиска внешних ключей (если вы это имели ввиду)

select confrelid::regclass as table_source
, af.attname as source_key,
conrelid::regclass as table_dest,
a.attname as dest_key,
ss2.conname as constraint_name
from pg_attribute af, pg_attribute a,
(select conrelid,confrelid,conkey[i] as conkey, confkey[i] as confkey,conname
from (select conrelid,confrelid,conkey,confkey,
generate_series(1,array_upper(conkey,1)) as i,conname
from pg_constraint where contype = 'f') ss) ss2
where af.attnum = confkey and af.attrelid = confrelid and
a.attnum = conkey and a.attrelid = conrelid
AND confrelid::regclass = 'public.tbl_servicecall'::regclass -- Ввод названия таблицы к которой нужно найти внешние ключи
order by conrelid::regclass,a.attname