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The first parameter in every KSAM procedure call must be filetable, a table describing the file and
its access. This table is defined in the WORKING-STORAGE SECTION of the COBOL program.
It requires eight words as illustrated in
Figure 3-1 Filetable Structure.
Figure 3-1 Filetable Structure
![[Filetable Structure]](img/f0301.gif)
- filenumber
A number identifying the file returned by the CKOPEN procedure
after the file named in words 2-5 has been successfully opened. After
the file is closed by CKCLOSE, filenumber is reset to 0. (This number
should be set to zero when the file table is initially defined.) It must
be defined as a COMPUTATIONAL item. - filename
The name of the KSAM file. This name is the actual designator
assigned to the file when it is created with the KSAMUTIL BUILD
command; filename may be a formal designator if it is equated to
the actual designator in a :FILE command. - input-output type
A code that limits the file access to input only, output only, or allows
both input and output: It must be defined as a COMPUTATIONAL item. - access mode
A code that indicates how the file will be processed: sequentially only,
randomly only, or either (dynamically): 2 = dynamic (sequential or random)
It must be defined as a COMPUTATIONAL item.
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