Updating Records in a VSAM File
The COBOL language statements that can be used to update a VSAM file in
the Environment and Data Divisions are the same.
Figure shows the statements that you can use in the Procedure Division
to update VSAM files.
________________________________________________________________
| Figure 73. Procedure Division Statements Used to Update VSAM Files |
|_______________________ ________________________ _______________________|
| ESDS | KSDS | RRDS |
|_______________________|________________________|_______________________|
| ACCESS IS SEQUENTIAL: | ACCESS IS SEQUENTIAL: | ACCESS IS SEQUENTIAL: |
| OPEN EXTEND | OPEN EXTEND | OPEN EXTEND |
| WRITE | WRITE | WRITE |
| CLOSE | CLOSE | CLOSE |
| or | or | or |
| OPEN I-O | OPEN I-O | OPEN I-O |
| READ | READ | READ |
| REWRITE | REWRITE | REWRITE |
| CLOSE | DELETE | DELETE |
| | CLOSE | CLOSE |
|_______________________|________________________|_______________________|
| ACCESS IS RANDOM: | ACCESS IS RANDOM: | ACCESS IS RANDOM: |
| | OPEN I-O | OPEN I-O |
| | READ | READ |
| not applicable | WRITE | WRITE |
| | REWRITE | REWRITE |
| | DELETE | DELETE |
| | CLOSE | CLOSE |
|_______________________|________________________|_______________________|
| ACCESS IS DYNAMIC | ACCESS IS DYNAMIC | ACCESS IS DYNAMIC |
| Sequential Processing:| Sequential Processing: | Sequential Processing:|
| | OPEN I-O | OPEN I-O |
| | READ NEXT | READ NEXT |
| not applicable | WRITE | WRITE |
| | REWRITE | REWRITE |
| | START | START |
| | DELETE | DELETE |
| | CLOSE | CLOSE |
|_______________________|________________________|_______________________|
| ACCESS IS DYNAMIC | ACCESS IS DYNAMIC | ACCESS IS DYNAMIC |
| Random Processing: | Random Processing: | Random Processing: |
| | OPEN I-O | OPEN I-O |
| | READ | READ |
| not applicable | WRITE | WRITE |
| | REWRITE | REWRITE |
| | DELETE | DELETE |
| | CLOSE | CLOSE |
|_______________________|________________________|_______________________|
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