cannot drop table users because other objects depend on it

Question

I want to drop my tables in database. But, when I use, for example, DROP TABLE if exists users; I receive this message:

cannot drop tab

Answer 1

If it was really necessary to drop that specific table with or without recreating it, then first find the object(s) that depends on it.

CREATE OR REPLACE VIEW admin.v_view_dependency AS 
SELECT DISTINCT srcobj.oid AS src_oid
  , srcnsp.nspname AS src_schemaname
  , srcobj.relname AS src_objectname
  , tgtobj.oid AS dependent_viewoid
  , tgtnsp.nspname AS dependant_schemaname
  , tgtobj.relname AS dependant_objectname
FROM pg_class srcobj
  JOIN pg_depend srcdep ON srcobj.oid = srcdep.refobjid
  JOIN pg_depend tgtdep ON srcdep.objid = tgtdep.objid
  JOIN pg_class tgtobj ON tgtdep.refobjid = tgtobj.oid AND srcobj.oid <> tgtobj.oid
  LEFT JOIN pg_namespace srcnsp ON srcobj.relnamespace = srcnsp.oid
  LEFT JOIN pg_namespace tgtnsp ON tgtobj.relnamespace = tgtnsp.oid
WHERE tgtdep.deptype = 'i'::"char" AND tgtobj.relkind = 'v'::"char";

Then,

select top 99 * from admin.v_view_dependency where src_objectname like '%the_table_name_it_complaint_about%';

The result set will show you the dependant object in the field "dependant_objectname".