Doc added May 2021

All of the READ for random access statement variations may be used with ISAM files. Note, however:

•   Each open ISAM file channel refers to both an index (IDX) and data (IDA) file. READ operations implicitly apply to only the IDA.

•   Although you can manually set the record number variable and read from IDA file independent of the index (as you would with a random access file), typically you would use an ISAM File Statements (codes 1, 2, 7, or 8) to establish the record number.

See ISAM File Statements for examples of ISAM operations involving READ statements.