IBM Tivoli NetView for z/OS Programming: Pipes - IBM notice

PIPE LOOKUP
162 Programming: Pipes
added. Contains all the lines in new. which are not in old.
deleted.
Contains all the lines which were in old. but are not in new.
unchanged.
Contains all the lines which are in both old. and new.
/* REXX Fragment - Assume stems old. and new. already created */
’PIPE (NAME LKUPXMP END %)’,
’| STEM new.’,
’| MIX: LOOKUP’,
’| STEM unchanged.’, /* from new. that matched line from old.*/
’% MIX:’, /* connect secondary output from lookup */
’| STEM added.’, /* from secondary--from new. unmatched */
’% STEM old.’, /* this STEM is a first stage! */
’| MIX:’, /* connect TWO streams of LOOKUP! */
’| STEM deleted.’ /* from old. with no match in new. */
Notes:
1. STEM old. immediately follows an end character making it the first stage of the
subsequent simple pipeline.
2. The MIX: label between the STEM old. and STEM deleted. stages acts as a
connector to the MIX: LOOKUP stage.
v Being that MIX: has an input stream, MIX: connects it to the MIX: LOOKUP
stage which defined the MIX: label. The input stream is connected as the next
available input stream, which in this case is the secondary input stream.
v Being that MIX: has an output stream, MIX: connects it to the MIX: LOOKUP
stage which defined the MIX: label. The output stream is connected as the
next available output stream, which in this case is the tertiary output stream.
So, the secondary input for LOOKUP is STEM old. and the tertiary output for
LOOKUP is STEM deleted.
For a clearer understanding of the connections involved in this example, see the
output generated after you change the second stage to MIX: (DEBUG) LOOKUP.
3. If you wanted STEM deleted. to contain line numbers from STEM old. instead
of the data, you can add the following stage immediately before to the STEM
deleted. stage:
EDIT LINECOUNT 1
IDLEOFF Example
See CLIST CNME1057 (IDLEOFF) for an example of LOOKUP with WILDCARD.
This example edits the detail records to facilitate wildcard pattern matching. The
data is then edited to return the data to its original form.