| SAS Component Language: Reference |
When an
application displays a subset of a SAS table,
you may want to let users display and scroll through all rows that meet the
search conditions. To do this, you can use a set of SCL functions that reread
table rows. For example, when a program displays the first row that meets
the conditions, SCL provides functions that you can use to mark the row.
Then a user can continue to search the rest of the SAS table for any other
rows that meet the search conditions, counting them along the way. After finding
the last row that meets the search conditions, the user can redisplay the
first row in the subset (the row that was marked earlier). The following
sequence of steps implements this technique:
- Use the NOTE function to mark a row in the subset
for later reading.
- Use the POINT function to return to the marked
row after you have located all rows that meet the search conditions.
- Use the DROPNOTE function to delete the NOTE marker
and free the memory used to store the note after the program finishes using
the noted row.
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
