pg_depend

(classid,objid,objsubid) depends on (refclassid,refobjid,refobjsubid).

-- which objects does relation 88088 depends on
select * from pg_depend where classid = 1259 and objid = 88088;

-- which objects depend on relation 88088
select * from pg_depend where refclassid = 1259 and refobjid = 88088;

dependency link

graph LR A[classid,objid,objsubid] --> B[refclassid,refobjid,refobjsubid]

example