ABL provides two structure types to support record fetches. One structure type, the index, you define in the schema of your database. The other structure type, a results list, is temporary; the AVM builds it at runtime. The results list associated with a DO, REPEAT, or OPEN QUERY statement with the PRESELECT option is sometimes called a preselect list.
In addition, there are two data types, ROWID and RECID, that allow you to retrieve a pointer to a fetched record. You can use this pointer to:
Position to and retrieve a record from a results list
Refetch a record and modify its lock status
Store as a future record reference
In addition to the examples in this section, you can learn more about ROWID in OpenEdge Getting Started: ABL Essentials.
Position to and retrieve a record from a results list
