Custom function sets
A function set is a collection of database functions
that are vendor-specific. You can customize the Function Description
Service to expose or define functions that your data source supports.
Defining additional vendor-specific functions is similar to defining
custom functions. The following elements are used to specify the vendor
group.
- id
- For a custom function set, the value of the id is
vendor_group. Groups with the same identifier in the same position of the tree are merged. - context
- Defining a context restricts the visibility of this group when the application specifies a particular context.
- vendor
- Identifier for the vendor. This restricts the visibility of this group when the application specifies a particular vendor.
- datasourceQueryType
- Underlying database query technology.