Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Programming Guide


Defining QSAM files and records in COBOL

Use the FILE-CONTROL entry to define the files in a COBOL program as QSAM files, and to associate the files with their external file-names.

An external file-name (a ddname or environment variable name) is the name by which a file is known to the operating system. In the following example, COMMUTER-FILE-MST is your program's name for the file; COMMUTR is the external name:

FILE-CONTROL.
    SELECT COMMUTER-FILE-MST
    ASSIGN TO S-COMMUTR
    ORGANIZATION IS SEQUENTIAL
    ACCESS MODE IS SEQUENTIAL.

The ASSIGN clause name can include an S- before the external name to document that the file is a QSAM file. Both the ORGANIZATION and ACCESS MODE clauses are optional.


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