How to compile invalid objects

How to compile invalid objects 1. Find INVALID objects: SELECT object_name, object_type FROM dba_objectsWHERE status = 'invalid'; 2. compile invalid objects: manually COMPILE: alter package pkg1 compile reuse settings; compile with PL/SQL Package: revalidate all invalid objects in the database, in parallel and in dependency order: begin utl_recomp.recomp_parallel (); end;/revalidates the procedure UPDATE_SALARY in schema HR: begin dbms_utility.validate ('hr', 'Update _ SALARY ', namespace => 1); end;/revalidates the package body HR. ACCT_MGMT: begin dbms_utility.validate ('hr', 'acct _ MGMT ', namespace => 2); end ;/