OUTPUT and LOADDEF
Use the OUTPUT statement to determine which segments and fields
are to be extracted.
When a record is retrieved from HCL Workload Automation for Z using the
SELECT statement, the entire record is retrieved and the header is processed
to identify each segment. The segment is then processed only if there is a reference to it.
If you code only OUTPUT statements for the segments you need, the processing
is reduced.
Record processing involves extracting every field in the segment, creating a data output record
for the segment, running a Segment Processing Exit (if requested,) and generating Batch Loader. Some
of this processing is avoided if you code only OUTPUT statements for the
fields from which you require data.
LOADDEF command to load in-built OUTPUT
statements. The following example shows how to load definitions of every field for every segment.
Use this command only when you need to extract entire objects, for example for Batch Loader
generation. LOADDEF *OUTPUT definitions for particular records, use
LOADDEF in a more selective way. For example, to load the in-built
OUTPUT statements for the Application Definition records specify:
LOADDEF AD*Restricting OUTPUT statements to just the Segments and Fields you need
reduces the amount of processing that Workload Automation Programming Language performs, both in the amount of
OUTPUT statements that must be parsed at startup, and in the amount of
segments that are processed when records are retrieved.