December 2000
Intermediate to advanced
224 pages
9h 52m
English
Content preview from SQL in a Nutshell
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Name
DROP FUNCTION
Synopsis
This command removes a user-defined function from the current database.
|
Vendor |
Command |
|---|---|
|
SQL Server |
Supported, with variations |
|
MySQL |
Supported, with variations |
|
Oracle |
Supported, with variations |
|
PostgreSQL |
Supported, with variations |
SQL99 Syntax and Description
DROP FUNCTION function_name {RESTRICT | CASCADE}This command permanently destroys a function. The
RESTRICT clause ensures that the command fails
if other database objects, such as a view, depend upon the function.
On the other hand, the CASCADE option drops the
function, any grants based on the function, and any dependent
database objects!
Microsoft SQL Server Syntax and Variations
DROP FUNCTION [owner_name.]function_name [,...n]
As with other SQL Server DROP commands, more
than one database object of the same type may be dropped by placing a
comma between the names of each database object.
MySQL Syntax and Variations
This command does not actually delete the file containing the
function. Instead, it deletes the function reference from the system
table, which can be added back by using the CREATE
FUNCTION statement.
Oracle Syntax and Variations
DROP FUNCTION [owner_name.]function_name
As with other Oracle DROP commands, the name of
the function owner may be specified. Otherwise, Oracle assumes the
current-user context, and only functions owned by the current user to
be dropped. Alternately, those users with DROP ANY
FUNCTION system privilege are allowed to drop any function
anywhere.
PostgreSQL Syntax ...
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