Wrappers are mechanisms by which the
federated database interacts with data sources. The federated database uses
routines stored in a library called a wrapper module to implement a wrapper.
These routines allow the federated database to perform operations such
as connecting to a data source and retrieving data from it iteratively.
Typically, the federated instance owner uses the CREATE WRAPPER statement to
register a wrapper in the federated database. You can register a wrapper as
fenced or trusted using the DB2_FENCED wrapper option.
You create one
wrapper for each type of data source that you want to access. For example, you
want to access three DB2® for z/OS® database tables, one DB2 for System i™
table, two Informix® tables, and one Informix view. In this case, you need to
create one wrapper for the DB2 data source objects and one wrapper for the
Informix data source objects. After these wrappers are registered in the
federated database, you can use these wrappers to access other objects from
those data sources. For example, you can use the DRDA® wrapper with all DB2
family data source objects—DB2 Database for Linux®, UNIX®, and Windows®, DB2 for
z/OS, DB2 for System i, and DB2 Server for VM and VSE.
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The term wrapper generally refers to a type of , such as a flat sheet made
out of , , or to enclose an object.
In computing, it may also refer to:
-
- , where some computer
programming code allows certain classes to work together that otherwise would
not
- ,
software that functions as an adapter between an operating system and a driver
- , a computer
term referring to a Java class in object-oriented programming
- , software
used for filtering network access
- , a technique used in data mining
In other uses, it may refer to:
- , a woman's garment which is worn over nightwear or lingerie
- Wrapper (fruit papers), the fruit growers own fruits packaging into it
- Wrapper, the outer leaf of tobacco used in
