ALTER PROCEDURE Statement

The ALTER PROCEDURE statement explicitly recompiles a standalone stored procedure. Explicit recompilation eliminates the need for implicit run-time recompilation and prevents associated run-time compilation errors and performance overhead.

To recompile a procedure that is part of a package, recompile the entire package using the ALTER PACKAGE Statement).

Note:

This statement does not change the declaration or definition of an existing procedure. To redeclare or redefine a standalone stored procedure, use the CREATE PROCEDURE Statement with the OR REPLACE clause.

The ALTER PROCEDURE statement is very similar to the ALTER FUNCTION statement. See ALTER FUNCTION Statement for more information.

Prerequisites

The procedure must be in your own schema or you must have ALTER ANY PROCEDURE system privilege.

Syntax

alter_procedure::=

alter_procedure
Description of the illustration alter_procedure.gif

compiler_parameters_clause::=

compiler_parameters_clause
Description of the illustration compiler_parameters_clause.gif

Keyword and Parameter Descriptions

schema

Specify the schema containing the procedure. If you omit schema, then the database assumes the procedure is in your own schema.

procedure

Specify the name of the procedure to be recompiled.

COMPILE

Specify COMPILE to recompile the procedure. The COMPILE keyword is required. the database recompiles the procedure regardless of whether it is valid or invalid.

  • the database first recompiles objects upon which the procedure depends, if any of those objects are invalid.

  • the database also invalidates any local objects that depend upon the procedure, such as procedures that call the recompiled procedure or package bodies that define procedures that call the recompiled procedure.

  • If the database recompiles the procedure successfully, then the procedure becomes valid. If recompiling the procedure results in compilation errors, then the database returns an error and the procedure remains invalid. You can see the associated compiler error messages with the SQL*Plus command SHOW ERRORS.

During recompilation, the database drops all persistent compiler switch settings, retrieves them again from the session, and stores them at the end of compilation. To avoid this process, specify the REUSE SETTINGS clause.

See Also:

Recompiling a Procedure: Example

DEBUG

Specify DEBUG to instruct the PL/SQL compiler to generate and store the code for use by the PL/SQL debugger. Specifying this clause is the same as specifying PLSQL_DEBUG = TRUE in the compiler_parameters_clause.

See Also:

Oracle Database Advanced Application Developer's Guide for information about debugging procedures

compiler_parameters_clause

This clause has the same behavior for a procedure as it does for a function. See the ALTER FUNCTION compiler_parameters_clause.

REUSE SETTINGS

This clause has the same behavior for a procedure as it does for a function. See the ALTER FUNCTION clause REUSE SETTINGS.

Example

Recompiling a Procedure: Example To explicitly recompile the procedure remove_emp owned by the user hr, issue the following statement:

ALTER PROCEDURE hr.remove_emp
   COMPILE;

If the database encounters no compilation errors while recompiling remove_emp, then remove_emp becomes valid. the database can subsequently execute it without recompiling it at run time. If recompiling remove_emp results in compilation errors, then the database returns an error and remove_emp remains invalid.

the database also invalidates all dependent objects. These objects include any procedures, functions, and package bodies that call remove_emp. If you subsequently reference one of these objects without first explicitly recompiling it, then the database recompiles it implicitly at run time.

Related Topics