Lookahead Routine
Figure 1 shows the specific steps in the RPG IV lookahead
routine. The item numbers in the following descriptions refer to the
numbers in the figure.
- 1
- The next record for the file being processed is read. However, if the file is a combined or update file (identified by a C or U, respectively, in position 17 of the file description specifications), the lookahead fields from the current record being processed is extracted.
- 2
- The lookahead fields are extracted.