Description: To drop a function, the function must be in your own schema or you must have the DROP ANY PROCEDURE system privilege.
You may specify the schema containing the function. If you omit the schema name then the database assumes the function is in your own schema.
The database invalidates any local objects that depend on, or call, the dropped function. If you subsequently reference one of these objects, then the database tries to recompile the object and returns an error if you have not re-created the dropped function.
If any statistics types are associated with the function, then the database disassociates the statistics types with the FORCE option and drops any user-defined statistics collected with the statistics type.
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