Adding Access Paths › Adding an Access Path › Adding a Query (QRY) Access Path

Adding a Query (QRY) Access Path

Once you add the QRY access path, following the instructions in the preceding section, Adding an Access Path, CA 2E creates and generates default values for three auxiliary objects for DDS only. Each object type has its own source, either DDS or CL, that is held in the appropriate source file in the generation library. These objects include:

• Logical file, which is based on the physical file whose data is being referenced.
• Physical file, which never contains data and is used to define a record format and keys to any HLL program generated for a function based on the QRY access path.
• CL program, which executes the Open Query File (OPNQRYF) command. This command is called at execution by any program generated for a function based on the QRY access path.

For more information on how the auxiliaries are implemented, see the Implementation table in the "Generating and Compiling" chapter in this guide.