There are two kinds of pattern in parameters: IN denotes the parameter is an input parameter
and RETURN denotes the parameter is a result parameter of Web services.
The syntax used to delete the method of Web service is:
DROP METHOD <name >;
After registry ofWeb services and methods, details about how to invokeWeb services are explicit.
When input parameters are specified, the SQL expression in database needs to be extended to invoke
external Web service. The basic structure of an SQL expression is:
select [top n1 [percent | ,n2 ]] < list>
from ...