Modes of Collection Processing

Modes of Collection Processing Modes of Collection Processing

There are four mode of collection processing. A description of these modes is presented here in the expectation that this knowledge will be useful in defining and testing a batching algorithm.
1) Single Table Raw:
This is the simplest case, with a single table and ascending record numbers. Examples are:
       o The "Reading Data" phase of a single table SORT;
       o Source table read of MATCH;
2) Single Table Sorted:
This is the result of a single table SORT. In this case, record numbers are random. Examples are:
       o GETCALC of Sorted single table;
3) Multi Table Raw:
In this case, the tables are processed single-file in the order of the hierarchy defined by the RELATE or ORDER function; the record numbers of each table are processed in ascending order. Examples are:
       o The "Reading Data" phase of RELATE or RELATEX;
4) Multi Table Sorted:
In this case, the multiple tables are processed concurrently; and the record numbers within a table are random and may be repeated. Examples are:
       o GETREC or GETCALC of RELATEd tables;