January 2002
Intermediate to advanced
640 pages
16h 39m
English
Content preview from Practical PostgreSQL
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Drop Function
Removes a user-defined function.
Synopsis
DROP FUNCTION name ( [ type [, ...] ] )
Parameters
nameThe name of the existing function you wish to drop.
typeZero or more data types consisting of the function’s arguments. The types combine with the name to uniquely identify the function.
Results
DROPThe message returned when a function is successfully dropped.
ERROR: RemoveFunction: Function'name(types)' does not existThe error returned if the function
namefor the specifiedtypesdoes not exist in the current database.
Description
Use this command to remove C function references that are defined in a database. Specifying the parameter types that the function takes allows proper identification; this is necessary when dealing with the C language, as functions exist with the same name that only differ in the types of arguments they take.
Note
DROP FUNCTION does not check if any database elements rely on the
function, or if removing it would cause any negative effects. You must check these things on
your own.
Example
The following example removes the title(integer) function from the
booktown database:
booktown=# DROP FUNCTION title(integer);
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