Compiling Invalid objects

DBMS_DDL.ALTER_COMPILE

Definition
This procedure is equivalent to the following SQL statement:
ALTER PROCEDUREFUNCTIONPACKAGE [.] COMPILE [BODY]

Syntax
Exec dbms_ddl.alter_compile ( type , schema, name);
Type : Must be either PROCEDURE, FUNCTION, PACKAGE, PACKAGE BODY or TRIGGER.
Schema : Database Username

Name : Objects name
Example
SQL> exec dbms_ddl.alter_compile ('PROCEDURE','SCOTT','TEST');

PL/SQL procedure successfully completed.

DBMS_UTILITY.COMPILE_SCHEMA

Definition
This procedure compiles all procedures, functions, packages, and triggers in the specified schema.

Syntax
Exec dbms_utility.compile_schema ( schema,compile all)

Schema : Database Username
Compile All : Object type ( procedure, function, packages,trigger)

Example
SQL> exec dbms_utility.compile_schema('SCOTT');

PL/SQL procedure successfully completed.

UTL_RECOMP

Definition
This script is particularly useful after a major-version upgrade that typically invalidates all PL/SQL and Java objects.

Syntax
Exec UTL_RECOMP.RECOMP_SERIAL ();

Example
SQL> Exec UTL_RECOMP.RECOMP_SERIAL ();

PL/SQL procedure successfully completed.

Note: Required SYS user to run this package.

UTLRP.SQL scripts

Definition
Recompiles all existing PL/SQL modules that were previously in an INVALID state, such as packages, procedures, and types.

Syntax
Located: $ORACLE_HOME/rdbms/admin

Example
SQL> @c:\oracle\product\10.1.0\db_1\rdbms\admin\UTLRP.SQL

TIMESTAMP
-----------------------------------------------------------------------
COMP_TIMESTAMP UTLRP_BGN 2007-08-04 12:47:21

PL/SQL procedure successfully completed.

TIMESTAMP
-----------------------------------------------------------------------
COMP_TIMESTAMP UTLRP_END 2007-08-04 12:47:26

PL/SQL procedure successfully completed.

Note: Required SYS user to run this script.
Recommended: After upgrade or migrate database.

Best Approach is manually recompiling all Invalid Objects

Spool recompile.sql
Select 'alter 'object_type' 'object_name' compile;'
From user_objects
Where status <> 'VALID'
And object_type IN ('VIEW','SYNONYM',
'PROCEDURE','FUNCTION',
'PACKAGE','TRIGGER');
Spool off
@recompile.sql

Note: VIEW,SYNONYM,PROCEDURE,PACKAGE,FUNCTION,TRIGGER

Spool pkg_body.sql
Select 'alter package 'object_name' compile body;'
From user_objects
where status <> 'VALID'
And object_type = 'PACKAGE BODY';
Spool off
@pkg_body.sql

Spool undefined.sql
select 'alter materizlized view 'object_name' compile;'
From user_objects
where status <> 'VALID'
And object_type ='UNDEFINED';
Spool off
@undefined.sql

Spool javaclass.sql
Select ‘alter java class 'object_name' resolve;'
from user_objects
where status <> 'VALID'
And object_type ='JAVA CLASS';
Spool off
@javaclass.sql

Spool typebody.sql
Select ‘alter type 'object_name' compile body;'
From user_objects
where status <> 'VALID'
And object_type ='TYPE BODY';
Spool off
@typebody.sql

Spool public_synonym.sql
Select 'alter public synonym 'object_name' compile;'
From user_objects
Where status <> 'VALID'
And owner = ‘PUBLIC’
And object_type = 'SYNONYM';
Spool off
@public_synonym.sql